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Rationale Both genetic variants and chronic obstructive pulmonary disease (COPD) contribute to the risk of incident severe coronavirus disease (COVID-19). Whether genetic risk of incident severe COVID-19 is the same regardless of preexisting COPD is unknown. Objectives In this study, we aimed to investigate the potential interaction between genetic risk and COPD in relation to severe COVID-19. Methods We constructed a polygenic risk score for severe COVID-19 by using 112 single-nucleotide polymorphisms in 430,582 participants from the UK Biobank study. We examined the associations of genetic risk and COPD with severe COVID-19 by using logistic regression models. Results Of 430,582 participants, 712 developed severe COVID-19 as of February 22, 2021, of whom 19.8% had preexisting COPD. Compared with participants at low genetic risk, those at intermediate genetic risk (odds ratio [OR], 1.34; 95% confidence interval [CI], 1.09–1.66) and high genetic risk (OR, 1.50; 95% CI, 1.18–1.92) had higher risk of severe COVID-19 (P for trend = 0.001), and the association was independent of COPD (P for interaction = 0.76). COPD was associated with a higher risk of incident severe COVID-19 (OR, 1.37; 95% CI, 1.12–1.67; P = 0.002). Participants at high genetic risk and with COPD had a higher risk of severe COVID-19 (OR, 2.05; 95% CI, 1.35–3.04; P

Background Several guidelines have suggested alternative glycemic markers for hemoglobin A1c among older adults with limited life expectancy or multiple coexisting chronic illnesses. We evaluated associations between fructosamine, albumin-corrected fructosamine (AlbF), fasting plasma glucose (FPG), and mortality in the diabetic and nondiabetic subpopulations, and compared which marker better predicts mortality among participants aged 80 and older. Methods Included were 2 238 subjects from the Healthy Ageing and Biomarkers Cohort Study (2012–2018) and 207 participants had diabetes at baseline. Multivariable Cox proportional hazards regression models investigated the associations of fructosamine, AlbF, FPG, and all-cause, cardiovascular disease (CVD), and non-CVD mortality in the diabetic and nondiabetic subpopulations. Restricted cubic splines explored potential nonlinear relations. C-statistic, integrated discrimination improvement (IDI), and net reclassification improvement (NRI) evaluated the additive value of different glycemic markers to predict mortality. Results Overall, 1 191 deaths were documented during 6 793 person-years of follow-up. In the linear model, per unit increases of fructosamine, AlbF, and FPG were associated with a higher risk of mortality in nondiabetic participants, with hazard ratios of 1.02 (1.00, 1.05), 1.27 (1.14, 1.42), and 1.04 (0.98, 1.11) for all-cause mortality, and 1.04 (1.00, 1.07), 1.38 (1.19, 1.59), and 1.10 (1.01, 1.19) for non-CVD mortality, respectively. Comparisons indicated that AlbF better predicts all-cause and non-CVD mortality in nondiabetic participants with significant improvement in IDI and NRI. Conclusions Higher concentrations of fructosamine, AlbF, and FPG were associated with a higher risk of all-cause or non-CVD mortality among the very elderly where AlbF may constitute an alternative prospective glycemic predictor of mortality.

Objective To examine the association of incident type 2 diabetes (T2D) risk with sleep factors, genetic risk, and their combination effects. Design Large prospective population-based cohort study. Methods This population-based prospective cohort study included 360 403 (mean (s.d.) age: 56.6 (8.0) years) participants without T2D at baseline from the UK Biobank. Genetic risk was categorised as high (highest quintile), intermediate (quintiles: 2–4), and low (lowest quintile) based on a polygenic risk score for T2D. Sleep scores, including long or short sleep duration, insomnia, snoring, late chronotype, and excessive daytime sleepiness, were categorized as an unfavourable, intermediate, or favourable sleep and circadian pattern. Results During a median follow-up of 9.0 years, 13 120 incident T2D cases were recorded. Among the participants with an unfavourable sleep and circadian pattern, 6.96% (95% CI: 6.68–7.24%) developed T2D vs 2.37% (95% CI: 2.28–2.46%) of participants with a favourable sleep and circadian pattern (adjusted hazard ratio (HR): 1.53, 95% CI: 1.45–1.62). Of participants with a high genetic risk, 5.53% (95% CI: 5.36–5.69%) developed T2D vs 2.01% (95% CI: 1.91–2.11%) of participants with a low genetic risk (adjusted HR: 2.89, 95% CI: 2.72–3.07). The association with sleep and circadian patterns was independent of genetic risk strata. Participants in the lowest quintile with an unfavourable sleep and circadian pattern were 3.97-fold more likely to develop T2D than those in the lowest quintile with a favourable sleep and circadian pattern. Conclusions Sleep and circadian patterns and genetic risk were independently associated with incident T2D. These results indicate the benefits of adhering to a healthy sleep and circadian pattern in entire populations, independent of genetic risk.

Background We investigated college students’ attitude and compliance towards a prevention strategy involving use of non-pharmaceutical interventions (NPIs) against coronavirus disease 2019 (COVID-19). Methods We conducted a cross-sectional online survey in four universities in Guangdong Province (China) based on purposive sampling. A self-administered questionnaire was given to College students (CSs) to measure the supportive attitude towards an outbreak control strategy and adoption of NPIs in respondents. Results A total of 44,446 CSs participated between 31 January and 10 February 2020; 92.7% of respondents supported the outbreak control strategy. The proportion of respondents who avoided public places, wore a facemask, avoid gatherings, and washed hands more frequently than usual was 94.8, 92.8, 91.2 and 86.9%. respectively. A total of 76.5% respondents adopted all four measures. A supportive attitude was associated with NPI adoption. Students who were female, postgraduate, anxious, and not depressed tended to have a higher supportive attitude and higher chance of NPI adoption. Conclusions Higher supportiveness towards the disease control strategy for the Chinese public may lead to higher adoption rate of NPIs. Psychosocial factors were related to a supportive attitude and adoption of the NPI. We believe that our findings could aid policymakers to create NPIs to prevent and control emerging infectious diseases such as COVID-19.

Background Candidate genes of neuromuscular junction (NMJ) pathway increased risk of frailty, but the extent and whether can be offset by exercises was unclear. The aim of this study was to investigate the association between aerobic exercises and incident frailty regardless of NMJ pathway‐related genetic risk. Methods A cohort study on participants from Chinese Longitudinal Healthy Longevity Survey was conducted from 2008 to 2011. A total of 7006 participants (mean age of 80.6 ± 10.3 years) without frailty at baseline were interviewed to record aerobic exercise status, and 4053 individuals among them submitted saliva samples. NMJ pathway‐related genes were genotyped and weighted genetic risk scores were constructed. Results During a median follow‐up of 3.1 years (19 634 person‐years), there were 1345 cases (19.2%) of incident frailty. Persistent aerobic exercises were associated with a 26% lesser frailty risk [adjusted hazard ratio (HR) = 0.74, 95% confidence interval (CI) = 0.64–0.85]. This association was stronger in a subgroup of 1552 longevous participants (age between 90 and 111 years, adjusted HR = 0.72, 95% CI = 0.60–0.87). High genetic risk was associated with a 35% increased risk of frailty (adjusted HR = 1.35, 95% CI = 1.16–1.58). Of the participants with high genetic risk and no persistent aerobic exercises, there was a 59% increased risk of frailty (adjusted HR = 1.59, 95% CI = 1.20–2.09). HRs for the risk of frailty increased from the low genetic risk with persistent aerobic exercise to high genetic risk without persistent aerobic exercise (P trend

Objective we aimed to investigate the association of smoking cessation with risk of all-cause mortality amongst oldest old people (aged ≥ 80 years). Design this was a prospective cohort study. Setting the Chinese Longitudinal Healthy Longevity Survey, implemented in 23 provinces of China. Participants a total of 28,643 community-dwelling oldest old people (mean age, 92.9 ± 7.5 years) were included. Methods in this community-based cohort study, Cox proportional hazards models were used to examine the association of smoking cessation with risk of all-cause mortality. Results during 136,585 person-years of follow-up from baseline to 1 September 2014, compared with never smokers, hazard ratios and 95% confidence intervals for all-cause mortality were 1.06 (1.02–1.10) for current smokers, 1.23 (1.09–1.39) for transient quitters (≤1 consecutive years since smoking cessation), 1.22 (1.12–1.32) for recent quitters (2–6 consecutive years since smoking cessation) and 1.11 (1.02–1.22) for long-term quitters (>6 consecutive years since smoking cessation). Cox models with penalised splines revealed an increased risk of all-cause mortality after smoking cessation; the highest mortality risk was observed within 2–4 years after smoking cessation and the risk gradually decreased with duration of smoking cessation. We further conducted subgroup analyses and sensitivity analyses to reduce the impact of reverse causation. Conclusions smoking is harmful to health in all populations. Our study findings indicated smoking cessation in late life to be associated with increased risk of all-cause mortality amongst oldest old people who have smoked for a long time.

Background Risk for transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) to close contacts of infected persons has not been well estimated. Objective To evaluate the risk for transmission of SARS-CoV-2 to close contacts in different settings. Design Prospective cohort study. Setting Close contacts of persons infected with SARS-CoV-2 in Guangzhou, China. Participants 3410 close contacts of 391 index cases were traced between 13 January and 6 March 2020. Data on the setting of the exposure, reverse transcriptase polymerase chain reaction testing, and clinical characteristics of index and secondary cases were collected. Measurement Coronavirus disease 2019 (COVID-19) cases were confirmed by guidelines issued by China. Secondary attack rates in different settings were calculated. Results Among 3410 close contacts, 127 (3.7% [95% CI, 3.1% to 4.4%]) were secondarily infected. Of these 127 persons, 8 (6.3% [CI, 2.1% to 10.5%]) were asymptomatic. Of the 119 symptomatic cases, 20 (16.8%) were defined as mild, 87 (73.1%) as moderate, and 12 (10.1%) as severe or critical. Compared with the household setting (10.3%), the secondary attack rate was lower for exposures in health care settings (1.0%; odds ratio [OR], 0.09 [CI, 0.04 to 0.20]) and on public transportation (0.1%; OR, 0.01 [CI, 0.00 to 0.08]). The secondary attack rate increased with the severity of index cases, from 0.3% (CI, 0.0% to 1.0%) for asymptomatic to 3.3% (CI, 1.8% to 4.8%) for mild, 5.6% (CI, 4.4% to 6.8%) for moderate, and 6.2% (CI, 3.2% to 9.1%) for severe or critical cases. Index cases with expectoration were associated with higher risk for secondary infection (13.6% vs. 3.0% for index cases without expectoration; OR, 4.81 [CI, 3.35 to 6.93]). Limitation There was potential recall bias regarding symptom onset among patients with COVID-19, and the symptoms and severity of index cases were not assessed at the time of exposure to contacts. Conclusion Household contact was the main setting for transmission of SARS-CoV-2, and the risk for transmission of SARS-CoV-2 among close contacts increased with the severity of index cases. Primary funding source Guangdong Province Higher Vocational Colleges and Schools Pearl River Scholar Funded Scheme.

Background To continuously improve medical quality and provide clinicians with more accurate blood test reports, this study collected blood quality control data in 2017 from a medical examination laboratory in a teaching level hospital located in Taoyuan City, Taiwan. Material and Methods The quality control data were arranged and analyzed from daily complete blood count (CBC), including white blood cells (WBC), red blood cells (RBC), hemoglobin (Hb), and platelets (PLT) recorded by a laboratory blood analyzer. Using the empirical Bayesian method, we estimated the variation of concentrations of the last and current batches to establish a novel control chart with adjusted upper and lower limits for the current batch, and then compared results with the traditional Shewhart method. The average run length (ARL) and sensitivity of the empirical Bayesian method were explored. Results The study found that ARL showed a qualified capability for the four blood routine tests when using the empirical Bayesian method. Compared to the Levey-Jennings control chart, the novel control chart presents an alert earlier when a deviation occurs and shows a fake alert later when there is no deviation. Conclusion The parallel tests showed that the longer the time is, the better the test's proficiency. We concluded that the empirical Bayesian method could be applied effectively to improve the capability of daily control in CBC laboratory tests.

The Seoul Metro Line 9 route connects the core region of the southern Han River (Gangnam) and other important areas such as Jamsil and Yeongdeungpo. The first phase facilities have existed for over ten years since they opened in 2009. Therefore, it is essential to replace the equipment through alternative investing. This study aims to perform a feasibility assessment for alternative investment in communication facilities following the “Guidelines for Performance Evaluation of Railway Facilities”. First, a set of alternative investment equipment was defined, and the performance of each item was evaluated through status surveys, interviews, and statistical analysis. Subsequently, the evaluation grade was derived by calculating and applying the weight of each item in performance evaluation based on AHP analysis. Accordingly, all communication facilities on Seoul Metro Line 9 were rated as grade D or less. To ensure stable management of the operations of the urban railway, it is necessary to frequently improve and replace the communication facilities. To the best of our knowledge, this is the first study that applied the standards established by the Ministry of Land, Infrastructure, and Transport for the alternative investment of communication facilities in the railway field. Additionally, this research is expected to be an important reference for promoting similar projects in the future.

Highlights • The prevalence of anxiety and depression symptoms was 3.4% and 22.8% among workers during the COVID-19 epidemic in China. • Epidemic-related factors especially having confirmed cases in the community and having confirmed friends were associated with the higher risk of anxiety and depression symptoms. • Major traditional risk factors, such as general or poor health status and always drinking alcohol, were found still to be the dominant factors associating with the increased risk of anxiety and depression symptoms. • Approximately 67.3% and 26.8% of workers reported demand for psychological education and interventions, respectively., Background COVID-19 has gained intense attention globally. However, little is known about the COVID-19-ralated mental health status among workers. Methods The cross-sectional online survey with 123,768 workers was conducted from February 2, 2020 to February 7, 2020 on a mega-size labor-intensive factory in Shenzhen, China. Oral consent was obtained prior to the questionnaire survey. The information collected in the survey included demographic characteristics, psychological symptoms, COVID-19-related information, and demands for psychological education and interventions. Symptoms of anxiety and depression were measured by the Zung's Self-Rating Anxiety Scale and Self-Rating Depression Scale. Logistic regression models were performed to determine the association between related factors and mental health status. Results The prevalence of anxiety and depression symptoms was 3.4% and 22.8%, respectively. The dominant epidemic-related factors were having confirmed cases in the community (odds ratio [OR], 2.75, 95% CI, 2.37–3.19) and having confirmed friends (OR, 2.44; 95% CI, 1.69–3.52) for the increased risk of anxiety and depression symptoms, respectively. Nevertheless, major traditional risk factors such as general or poor health status and always drinking alcohol were still the dominant factors associated with the increased risk of anxiety and depression symptoms. Overall, 67.3% and 26.8% workers reported desire for psychological education and interventions, respectively. Limitations All assessments were self-reported, resulting in a risk of method bias. Conclusions Our findings show a relatively low prevalence of anxiety symptoms, a relatively high prevalence of depression symptoms, and urgent demand for psychological education and interventions among workers during the COVID-19 outbreak.

ObjectivesTo evaluate the associations of regular glucosamine use with all-cause and cause-specific mortality in a large prospective cohort.MethodsThis population-based prospective cohort study included 495 077 women and men (mean (SD) age, 56.6 (8.1) years) from the UK Biobank study. Participants were recruited from 2006 to 2010 and were followed up through 2018. We evaluated all-cause mortality and mortality due to cardiovascular disease (CVD), cancer, respiratory and digestive disease. HRs and 95% CIs for all-cause and cause-specific mortality were calculated using Cox proportional hazards models with adjustment for potential confounding variables.ResultsAt baseline, 19.1% of the participants reported regular use of glucosamine supplements. During a median follow-up of 8.9 years (IQR 8.3–9.7 years), 19 882 all-cause deaths were recorded, including 3802 CVD deaths, 8090 cancer deaths, 3380 respiratory disease deaths and 1061 digestive disease deaths. In multivariable adjusted analyses, the HRs associated with glucosamine use were 0.85 (95% CI 0.82 to 0.89) for all-cause mortality, 0.82 (95% CI 0.74 to 0.90) for CVD mortality, 0.94 (95% CI 0.88 to 0.99) for cancer mortality, 0.73 (95% CI 0.66 to 0.81) for respiratory mortality and 0.74 (95% CI 0.62 to 0.90) for digestive mortality. The inverse associations of glucosamine use with all-cause mortality seemed to be somewhat stronger among current than non-current smokers (p for interaction=0.00080).ConclusionsRegular glucosamine supplementation was associated with lower mortality due to all causes, cancer, CVD, respiratory and digestive diseases.

In order to explore frailty subtypes and find their associated risk factors, we conducted cross-sectional surveys of 5,341 seniors aged 60 and over in China using the Frailty Index (FI) scale. We identified four frailty subtypes, namely multi-frail, cognitive and functionally frail, psychologically frail and physiologically frail. Old age and low education level were the common risk factors among the four subtypes. Being widowed, divorced or unmarried was a risk factor for multi-frail, cognitive and functionally frail and psychologically frail, and male sex was a protective factor against cognitive and functionally frail and psychologically frail subtypes. Having a harmonious relationship with family was a protective factor against multi-frail, and fewer visits to the elderly by their children was a risk factor for psychologically frail. Dissatisfaction with their housing was a risk factor for cognitive and functionally frail, psychologically frail and physiologically frail, and a pension being the main source of income was a risk factor for cognitive and functionally frail and psychologically frail. Exercising every day was a protective factor against multi-frail and cognitive and functionally frail, and a lower level of physical activity was a risk factor for all four frailty subtypes. Our findings confirm the heterogeneity of frailty and suggest that different frail elderly individuals need more targeted care interventions.

Introduction: The association patterns of hemoglobin (HB) concentrations with mortality among the longevity older adults are unclear. We aimed to evaluate the relationship among older adults form Chinese longevity regions.Methods: We included 1,785 older adults aged ≥65 years (mean age, 86.7 years; 1,002 women, 783 men) from the community-based Chinese Longitudinal Healthy Longevity Survey. We estimated the hazard ratios (HRs) and 95% confidence intervals (CIs) for all-cause mortality using multivariable Cox proportional hazards models and Cox models with restricted cubic spline.Results: In total, 999 deaths occurred during a median follow-up of 5.4 years from 2011 to 2017. Restricted cubic spline analysis found no non-linear association between HB concentrations and all-cause mortality after a full adjustment for covariates among the older adults form longevity regions (p > 0.05 for non-linearity). The risk for all-cause mortality was significantly higher in the groups with HB concentration of Conclusions: Among older adults form Chinese longevity regions, HB concentrations were found to be inversely and linearly associated with all-cause mortality. Further prospective intervention trials are needed to confirm whether higher HB concentrations had a lower risk of mortality in these older adults.

Background: Hypertension is a leading contributor to the global burden of disease and to mortality. The combined effects of sleep factors on the risk of hypertension are unclear. We aimed to evaluate the effect of combined sleep factors on the risk of hypertension and to explore whether this association is independent of genetic risk.Methods: This population-based prospective cohort study included 170,378 participants from the UK Biobank study. We conducted a healthy sleep score based on a combination of major five sleep factors and a genetic risk score based on 118 risk variants. Cox proportional hazard regression models were used to estimate hazard ratios (HRs) and 95% confidence intervals (CIs).Results: A total of 170,378 participants were included. Compared to participants with a healthy sleep score of 0–1, those with healthy sleep scores of 2 (HR, 0.90; 95% CI, 0.83–0.98), 3 (HR, 0.81; 95% CI, 0.75–0.88), 4 (HR, 0.74; 95% CI, 0.68–0.81), or 5 (HR, 0.67; 95% CI, 0.59–0.77) had increasingly lower risks of hypertension (P for trend Conclusions: Favorable sleep pattern was associated with a low risk of hypertension, regardless of genetic risk. These findings highlight the potential of sleep interventions to reduce risk of hypertension across entire populations.

Chronic inflammation exerts pleiotropic effects in the aetiology and progression of chronic obstructive pulmonary disease (COPD). Glucosamine is widely used in many countries and may have anti-inflammatory properties. We aimed to prospectively evaluate the association of regular glucosamine use with incident COPD risk and explore whether such association could be modified by smoking in the UK Biobank cohort, which recruited more than half a million participants aged 40–69 years from across the UK between 2006 and 2010. Cox proportional hazards models with adjustment for potential confounding factors were used to calculate hazard ratios (HR) as well as 95 % CI for the risk of incident COPD. During a median follow-up of 8·96 years (interquartile range 8·29–9·53 years), 9016 new-onset events of COPD were documented. We found that the regular use of glucosamine was associated with a significantly lower risk of incident COPD with multivariable adjusted HR of 0·80 (95 % CI, 0·75, 0·85; P < 0·001). When subgroup analyses were performed by smoking status, the adjusted HR for the association of regular glucosamine use with incident COPD were 0·84 (0·73, 0·96), 0·84 (0·77, 0·92) and 0·71 (0·62, 0·80) among never smokers, former smokers and current smokers, respectively. No significant interaction was observed between glucosamine use and smoking status (Pfor interaction = 0·078). Incident COPD could be reduced by 14 % to 84 % through a combination of regular glucosamine use and smoking cessation.

Background While well-conducted systematic reviews (SRs) can provide the best evidence on the potential effectiveness of acupuncture, limitations on the methodological rigour of SRs may impact the trustworthiness of their conclusions. This cross-sectional study aimed to evaluate the methodological quality of a representative sample of SRs on acupuncture effectiveness. Methods Cochrane Database of Systematic Reviews, MEDLINE, and EMBASE were searched for SRs focusing on the treatment effect of manual acupuncture or electro-acupuncture published during January 2018 and March 2020. Eligible SRs must contain at least one meta-analysis and be published in English language. Two independent reviewers extracted the bibliographical characteristics of the included SRs with a pre-designed questionnaire and appraised the methodological quality of the studies with the validated AMSTAR 2 (A MeaSurement Tool to Assess systematic Reviews 2). The associations between bibliographical characteristics and methodological quality ratings were explored using Kruskal-Wallis rank tests and Spearman’s rank correlation coefficients. Results A total of 106 SRs were appraised. Only one (0.9%) SR was of high overall methodological quality, zero (0%) was of moderate-quality, six (5.7%) and 99 (93.4%) were of low-quality and critically low-quality respectively. Among appraised SRs, only ten (9.4%) provided an a priori protocol, four (3.8%) conducted a comprehensive literature search, five (4.7%) provided a list of excluded studies, and six (5.7%) performed meta-analysis appropriately. Cochrane SRs, updated SRs, and SRs that did not search non-English databases had relatively higher overall quality. Conclusions Methodological quality of SRs on acupuncture is unsatisfactory. Future reviewers should improve critical methodological aspects of publishing protocols, performing comprehensive search, providing a list of excluded studies with justifications for exclusion, and conducting appropriate meta-analyses. These recommendations can be implemented via enhancing the technical competency of reviewers in SR methodology through established education approaches as well as quality gatekeeping by journal editors and reviewers. Finally, for evidence users, skills in SR critical appraisal remain to be essential as relevant evidence may not be available in pre-appraised formats.

Kidney diseases can cause severe morbidity, mortality, and health burden. Determining the risk factors associated with kidney damage and deterioration has become a priority for the prevention and treatment of kidney disease. This study followed 1042 chronic kidney disease (CKD) patients with Stage 3–5 kidney disease who were treated at a public veteran’s hospital through the national prevention program. A total of 12.5 years of records of clinical measurements were collected and analyzed using dynamic and static Cox hazard models to predict the progression to dialysis treatment. The results showed that the statistical significance of several variables in patients with Stage 3–5 CKD was attenuated while the dynamic model was being used. The estimated glomerular filtration rate (eGFR) and urine protein to creatinine ratio (PCR) had the powerful ability to predict the progression of CKD patients with Stage 3a and Stage 3b–5 kidney disease, whereas serum calcium was also predictive for the progression of Stages 3b–5 CKD. Because these two sub-stages of Stage 3 CKD are often associated with differences in routine measurements and the risk analysis of renal dialysis, future research can use this predictive model as a reference while similar prevention programs are implemented.

Some patients retested positive for SARS-CoV-2 following negative testing results and discharge. However, the potential risk factors associated with redetectable positive testing results in a large sample of patients who recovered from COVID-19 have not been well-estimated. A total of 745 discharged patients were enrolled between January 30, 2020, and September 9, 2020, in Guangzhou, China. Data on the clinical characteristics, comorbidities, drug therapy, RT-PCR testing, and contact modes to close contacts were collected. Patients who tested positive for SARS-CoV-2 after discharge were confirmed by guidelines issued by China. The repositive rate in different settings was calculated. Among 745 discharged patients, 157 (21.1%; 95% CI, 18.2–24.0%) tested repositive and the repositive rate was 16.8% (95% CI, 14.1–24.0%) for nasopharyngeal swabs and 9.7% (95% CI, 7.0–12.5%) for anal swabs. Among them, 55 (35.0%) were asymptomatic, 15 (9.6%) had mild symptoms, 83 (52.9%) had moderate symptoms, and 4 (2.6%) had severe symptoms at the first admission. The days from discharge to repositivity was 8.0 (IQR, 8.0–14.0). Most repositive patients were without clinical symptoms, and lymphocyte cell counts were higher than before being discharged. The likelihood of repositive testing for SARS-CoV-2 RNA was significantly higher among patients who were of younger age (OR, 3.88; 95% CI, 1.74–8.66, 0–17 years old), had asymptomatic severity (OR, 4.36; 95% CI, 1.47–12.95), and did not have clinical symptoms (OR, 1.89; 95% CI, 1.32–2.70, without fever). No other positive patients emerged within the families or close contacts of repositive patients. Our findings support prolonged but intermittent viral shedding as the probable cause for this phenomenon; we need to familiarize with the possibility that the virus will remain endemic.

BackgroundThe associations of SSBs, ASBs and pure fruit/vegetable juices with CVD events have not been thoroughly evaluated. The present study determined the association of soft drinks with CVD and effects of the substitution of alternative beverages for soft drinks and the population-attributable fraction of CVD mortality due to soft drinks.MethodsA cohort study was performed using data from UK Biobank and 168007 participants (mean (SD) age, 55.6 (7.9) years) without CVD/cancer at baseline were eligible for this analysis. Dietary consumption of SSBs, ASBs and pure fruit/vegetable juices was self–reported via a 24–hour dietary questionnaire between 2009 and 2012 and followed up to 2018. ResultsDuring a median follow–up of 7.0-year, we recorded 5922 incident CVD cases and 884 CVD deaths. Multivariable adjusted analyses revealed that compared to non–consumers, participants who consumed >2.5 drinks/day had a higher risk of CVD mortality and incidence with HR (95% CI) of 1.63 (1.22–2.17) and 1.23 (1.09–1.39) for SSBs, and 1.77 (1.23–2.56) and 1.20 (1.02–1.42) for ASBs, respectively. Compared to non–consumers, moderate pure fruit/vegetable juice consumers (>0–2.5 drinks/day) have an 8% (2%–13%)–34% (16%–48%) lower risk for CVD incidence and mortality. There was a positive dose–response association of SSBs per 5% energy with CVD mortality and incidence with HR (95% CI) of 1.15 (1.17–1.25) and 1.06 (1.03–1.10), respectively. Substituting one drink/day of pure fruit/vegetable juice, un–sweetened tea/coffee for SSBs and ASBs was associated with 4%–24% lower risks for CVD mortality and incidence. A reduced SSB intake to below 5% energy may prevent 4% (1%–8%) of CVD mortality.ConclusionSSBs and ASBs was associated with a higher CVD mortality and morbidity. Pure fruit/vegetable juice and un–sweetened tea/coffee are suitable alternatives to SSBs and ASBs to reduce CVD risk.

Background Inflammatory markers, such as high sensitivity C-reactive protein (hs-CRP), and cognitive impairment (CI) are associated with mortality; CRP is related to the deterioration of CI. However, it is still unknown whether these two indices predict mortality independent of each other. Furthermore, their joint effect on all-cause mortality has not been well established, especially in oldest-old adults. Methods Based on data from the 2012 wave of the Chinese Longitudinal Healthy Longevity Survey (CLHLS), we included 1447 oldest-old adults (mean age 84.7 years and 58.7% were female, weighted) with information on hs-CRP (stratified by a cutoff value of 3.0 mg/L) and cognition (quantified by Mini-Mental Status Examination (MMSE) scored according to the personal educational level) at baseline. Mortality was assessed in followed 2014 and 2017 waves. Cox proportional hazards regression models were used, with adjustment for hs-CRP and cognition (mutually controlled) and several traditional mortality risk factors. Results During a median follow-up period of 32.8 months (Q1-Q3, 9.7–59.0 months), 826 participants died. Hs-CRP [HR > 3.0 mg/L vs ≤ 3.0 mg/L: 1.64 (95% CI, 1.17, 2.30)] and cognition [HR CI vs normal: 2.30 (95% CI, 1.64, 3.21)] each was independent predictor of all-cause mortality, even after accounting for each other and other covariates. Monotonic and positive associations were observed in combined analyses, in which the highest mortality risk was obtained in elders with both high hs-CRP> 3.0 mg/L and CI [HR: 3.56 (95% CI, 2.35, 5.38)].The combined effects were stronger in male and younger oldest-old (aged 80–89 years). Conclusion High hs-CRP and CI, both individually and jointly, were associated with increased all-cause mortality risks in Chinese oldest-old. Intervention strategies for preventing inflammation and maintaining adequate cognitive function may be more important in male and younger oldest-old for reducing mortality risk.

Background Evidence of the trend of the incidence of activities of daily living (ADL) disability among Chinese older people is limited. We aimed to investigate the time trends and potential risk factors for the incidence of ADL disability among Chinese older people (≥65 years). Methods We established two consecutive and nonoverlapping cohorts (6,857 participants in the 2002 cohort and 5,589 participants in the 2008 cohort) from the Chinese Longitudinal Healthy Longevity Survey. ADL disability was defined as the need for assistance with at least one essential activity (dressing, bathing, toileting, eating, indoor activities, and continence). Cox proportional hazards models were used to identify factors associated with the trend in the incidence of ADL disability from 2002 to 2014. Results The incidence (per 1,000 person-years) of ADL disability decreased significantly from 64.2 in the 2002 cohort to 46.6 in the 2008 cohort (p < .001), and decreasing trends in the incidence of ADL disability were observed for all sex, age, and residence subgroups (all p < .001), even after adjusting for multiple potential confounding factors. Moreover, we found that adjustment for sociodemographic, lifestyle information, and cardiovascular risk factors (hypertension, diabetes, heart disease, and stroke) explained less of the decline in ADL disability during the period from 2002 to 2014. Conclusion The incidence of ADL disability among the older adults in China appears to have decreased during the study period, and this finding cannot be explained by existing sociodemographic and lifestyle information and cardiovascular risk factors.

ObjectiveTo evaluate whether evidence-based, individualised (EBI) counselling regarding hypertension and the treatment would affect medication use in insured patients with mild hypertension in China.MethodsWe conducted a parallel-group, randomised controlled trial in two primary care centres in Shenzhen, a metropolitan city in China. Patients with mild primary hypertension, 10-year risk of cardiovascular diseases (CVDs) lower than 20% and no history of CVDs were recruited and randomly allocated to two groups. EBI plus general counselling was provided to the intervention group and general counselling alone to the control group. EBI counselling included information on the 10-year CVD risk and treatment benefit in terms of absolute risk reduction estimated for each individual and information on average side effects and costs of antihypertensive drugs. The outcomes included use of antihypertensive drugs and adherence to the treatment at 6-month follow-up, with the former being primary outcome.ResultsTwo hundred and ten patients were recruited, with 103 and 107 allocated to the intervention and control groups, respectively. At baseline, 62.4% of the patients were taking antihypertensive drugs that were all covered by health insurance. At the end of 6-month follow-up, there was no statistically significant difference in the rate of medication use between the intervention group and the control group (65.0% vs 57.9%; OR=1.35, 95% CI: 0.77 to 2.36). The difference in adherence rate between the two groups was not statistically significant either (43.7% vs 40.2%; OR=1.15, 95% CI 0.67 to 2.00]). The results were robust in sensitivity analyses that used different cutoffs to define the two outcomes.ConclusionsThe EBI counselling by health educators other than the caring physicians had little impact on treatment choices and drug-taking behaviours in insured patients with mild primary hypertension in this study. It remains unclear whether EBI counselling would make a difference in uninsured patients, especially when conducted by the caring physicians.Trial registration numberChiCTR-TRC-14004169.

Background The aim of this study was to examine the trends in impairment regarding activities of daily living (ADL), physical performance, and cognitive function among the oldest-old (those aged 80 and older) in China between 1998 and 2014. Methods We used data on 34,297 oldest-old individuals from the seven waves of the Chinese Longitudinal Healthy Longevity Study. We estimated age, period, and cohort effects on the prevalence of self-reported ADL impairment, tested physical performance and cognitive function impairment using the age–period–cohort model. Results Regarding age, the prevalence of ADL, physical performance, and cognitive function impairment were highest in the centenarians, but they did not increase with age in this population. Among the literate subgroup, the prevalence of cognitive impairment increased more rapidly with age than that in the illiterate subgroup. Regarding period, the prevalence of self-reported and tested physical impairment slowly increased between 1998 and 2014, but cognitive impairment remained stable. Regarding cohort, ADL impairment continuously decreased. However, physical and cognitive impairment remained stable after a brief decline in the early birth cohorts. Conclusions The results suggest that the age effect is still the most obvious effect regarding several types of functional impairment. The likelihood of a younger person experiencing functional impairment may not change significantly, but ADL is likely to be amenable to improvement resulting from improved medical and social care. Therefore, increased care for the oldest-old may considerably improve their quality of life, particularly regarding their basic ADL.

BACKGROUND: High concentrations of plasma 25-hydroxyvitamin D [25(OH)D], a marker of circulating vitamin D, have been associated with a lower risk of mortality in epidemiologic studies of multiple populations, but the association for Chinese adults aged ≥80 y (oldest old) remains unclear. OBJECTIVE: We investigated the association between plasma [25(OH)D] concentration and all-cause mortality among Chinese adults aged ≥80 y. DESIGN: The present study is a prospective cohort study of 2185 Chinese older adults (median age: 93 y). Prospective all-cause mortality data were analyzed for survival in relation to plasma 25(OH)D using Cox proportional hazards regression models, with adjustments for potential sociodemographic and lifestyle confounders and biomarkers. The associations were measured with HR and 95% CIs. RESULTS: The median plasma 25(OH)D concentration was 34.4 nmol/L at baseline. Over the 5466 person-year follow-up period, 1100 deaths were identified. Men and women were analyzed together as no effect modification by sex was found. After adjusting for multiple potential confounders, the risk of all-cause mortality decreased as the plasma 25(OH)D concentration increased (P-trend

Background: Little is known about the role of specific leisure activities in affecting cognitive functions. We aim to examine the associations of specific leisure activities with the risk of cognitive impairment among oldest-old people in China. Methods: This community-based prospective cohort study included 10,741 cognitively normal Chinese individuals aged 80 years or older (median age 88 years) from the Chinese Longitudinal Healthy Longevity Survey. Cognitive function was assessed using the Mini-Mental State Examination (MMSE). Cox proportional hazards models were utilized to estimate the effects of specific leisure activities on cognitive impairment outcome. Results: During a median follow-up time of 3.4 years (41,760 person-years), 2,894 participants developed cognitive impairment. Compared to those who “never” engaged in watching TV or listening to radio, reading books or newspapers, and playing cards or mah-jong, those who engaged in such activities “almost every day” reduced their risk of cognitive impairment, the fully-adjusted hazard ratios were 0.56 (0.51–0.61), 0.64 (0.53–0.78), and 0.70 (0.56–0.86), respectively. The association between the risk of cognitive impairment and watching TV and listening to the radio, playing cards or mah-jong, and reading books or newspapers were stronger among those who had two or more years of education. Moreover, the association between risk of cognitive impairment and watching TV and listening to radio was stronger in men than in women. Conclusions: In conclusion, a greater frequency of TV watching or radio listening, reading books or newspapers, and playing cards or mah-jong may decrease the risk of cognitive impairment among the oldest-old.

Context The patterns of associations between glycated Hb (HbA1c) and mortality are still unclear. Objective To explore the extent to which ranges of HbA1c levels are associated with the risk of mortality among participants with and without diabetes. Design, Setting, and Patients This was a nationwide, community-based prospective cohort study. Included were 15,869 participants (median age 64 years) of the Health and Retirement Study, with available HbA1c data and without a history of cancer. Cox proportional hazards regression models were used to estimate hazard ratios with 95% CIs for mortality. Results A total of 2133 participants died during a median follow-up of 5.8 years. In participants with diabetes, those with an HbA1c level of 6.5% were at the lowest risk of all-cause mortality. When HbA1c level was 7.4%, the increased all-cause mortality risk became statistically significant as compared with an HbA1c level of 6.5%. As for participants without diabetes, those with an HbA1c level of 5.4% were at the lowest risk of all-cause mortality. When the HbA1c level was Conclusions A U-shaped and reverse J-shaped association for all-cause mortality was found among participants with and without diabetes. The corresponding optimal ranges for overall survival are predicted to be 5.6% and 7.4% and 5.0% and 6.5%, respectively.

The patterns of the association between high-density lipoprotein cholesterol (HDL-C) concentrations and mortality among the elderly are still unclear.To examine the association of HDL-C concentrations with mortality and to identify the optimal HDL-C concentration range that predicts the lowest risk of all-cause mortality among the elderly.This was a nationwide, community-based, prospective cohort study.This study included 7766 elderly individuals (aged ≥65 years; mean age: 74.4 years) from the Health and Retirement Study. Cox proportional hazards models and Cox models with penalized smoothing splines were used to estimate hazard ratios (HRs) with 95% CI for all-cause and cause-specific mortality.During a median follow-up of 5.9 years, 1921 deaths occurred. After a full adjustment for covariates, a nonlinear (P0.001 for nonlinearity) association was found between HDL-C and all-cause mortality [minimum mortality risk at 71 mg/dL (1.84 mM)]; the risk for all-cause mortality was significantly higher in the groups with HDL-C concentration61 mg/dL (1.58 mM; HR: 1.18; 95% CI: 1.05 to 1.33) and with HDL-C concentration87 mg/dL (2.25 mM; HR: 1.56; 95% CI: 1.17 to 2.07) than in the group with HDL-C concentrations ranging from 61 to 87 mg/dL (1.58 to 2.25 mM). Nonlinear associations of HDL-C concentrations with both cardiovascular and noncardiovascular mortality were also observed (both P0.001 for nonlinearity).Among the elderly, nonlinear associations were found between HDL-C and all-cause and cardiovascular mortality. The single optimal HDL-C concentration and range were 71 mg/dL and 61 to 87 mg/dL, respectively.

Objectives Currently, most treatment guidelines suggest lowering hypertriglyceridemia of any severity, even in elderly individuals. However associations of serum triglycerides (TGs) with adverse health and mortality risk decrease with age, it remains unclear among the oldest old (aged 80 years and older). The study was to investigate the relationship of serum TG concentrations with cognitive function, activities of daily living (ADLs), frailty, and mortality among the oldest old in a prospective cohort study. Design Longitudinal prospective cohort study. Setting Community-based setting in longevity areas in China. Participants A total of 930 (mean age = 94.0 years) Chinese oldest old. Measurements The TG concentrations were measured at baseline survey in 2009. Cognitive function, ADLs, frailty, and mortality were determined over 5 years of follow-up. Cox proportional hazards models and competing risk models were performed to explore the association, adjusting for potential confounders. Results Each 1-mmol/L increase in TGs was associated with a nearly 20% lower risk of cognitive decline, ADL decline, and frailty aggravation during the 5 years of follow-up. Consistently, higher TGs (each 1 mmol/L) was associated with lower 5-year all-cause mortality after fully adjustment (hazard ratio [HR] = 0.79; 95% confidence interval [CI] = 0.69-0.89). Nonelevated TG concentrations (less than 2.26 mmol/L) were associated with higher mortality risk (HR = 1.72; 95% CI = 1.22-2.44), relative to TGs of 2.26 mmol/L or more. We observed similar results regarding TG concentrations and mortality in 1-year lag analysis and when excluding participants with identified chronic disease. Conclusion In the oldest old, a higher concentration of TGs was associated with a lower risk of cognitive decline, ADL decline, frailty aggravation, and mortality. This paradox suggests the clinical importance of revisiting the concept of "the lower the better" for the oldest old. J Am Geriatr Soc 67:741-748, 2019.

This study demonstrated the optically tunable random lasing from azo-dye-doped polymer dispersed liquid crystal (PDLC) in capillary tubes, in order to expand new applications for this device. The azo-dye-doped PDLC was prepared in glass capillaries with different core diameters, and the random lasing thresholds of these samples were measured respectively. The spectra of random lasers were measured with increasing the intensity of ultraviolet radiation. The experimental results show that the random laser threshold measurements of different core diameter capillary samples (100 μm, 300 μm, 500 μm) are 11.8 μJ/pulse, 8.6 μJ/pulse and 13.2 μJ/pulse. The experimental results also show that as the intensity of ultraviolet radiation increases (from 0 mW/cm2 to 150 mW/cm2), the random laser intensity decreases gradually, and the FWHM of the spectrum becomes wider. And the random lasing showed similar properties under the UV beam with different polarized directions during the optical tuning process. Our work verifies the possibility to fabricate miniature laser devices in cylindrical confinement structures, and extends the application scope of PDLC.

Background The coronavirus disease 2019 (COVID-19) pandemic is a worldwide public health emergency that began in late 2019 and is still ongoing. Medical staff are at a particularly high risk of mental stress due to their close contact with infected patients. This study aimed to assess medical staff anxiety and depression levels from different risk-level areas in China during the early period of the COVID-19 outbreak and identify the main factors that might affect their mental health. Methods From February 22 to March 9, 2020, we conducted a 4-part online questionnaire to survey medical staff across different Chinese provinces about their anxiety and depression levels during the initial COVID-19 outbreak. The survey considered different demographic characteristics, anxiety (General Anxiety Disorder-7) scores, depression (Patient Health Questionnaire-9) scores, and occupational protection scores. Snowball sampling via a WeChatTM group was performed to collect the data. Results Among the 7,413 respondents, the rates of anxiety and depression reported among medical staff were 33.74% [2,501] and 27.65% [2,050], respectively. The odds of being assessed with severe anxiety were higher among nurses, those who were widowed, those in poor physical health, those working in COVID-19 designated facilities, and those receiving more than 50% negative/false information every day; the odds decreased by 5.8% with every 1-point increase in occupational protection. The odds of being assessed with moderate to severe depression or above were higher for the 18-30-year-old group, divorcees, those in poor physical health, and those receiving more than 50% of negative/false information every day; these odds decreased by 4.5% with every 1-point increase in occupational protection. Medical staff working in areas with a low exposure risk were at high risk of both anxiety and depression. Conclusions During the outbreak of COVID-19 in China, a significant proportion of medical staff faced psychological problems, even those in areas with a low exposure risk. Targeted interventions should focus more on nurses, widowed /divorced, and medical staff with poor physical health, less clinical experience, or insufficient occupational protection. The authenticity and orientation of media also showed a correlation with the mental state of medical staff.

Cervical cancer is the fourth most common cancer worldwide, but its incidence varies greatly in different countries. Regardless of incidence or mortality, the burden of cervical cancer in China accounts for approximately 18% of the global burden. The Chinese Cervical Cancer Clinical Study is a hospital-based multicenter open cohort. The major aims of this study include (i) to explore the associations of therapeutic strategies with complications as well as mid- and long-term clinical outcomes; (ii) to widely assess the factors which may have an influence on the prognosis of cervical cancer and then guide the treatment options, and to estimate prognosis using a prediction model for precise post-treatment care and follow-up; (iii) to develop a knowledge base of cervical clinical auxiliary diagnosis and prognosis prediction using artificial intelligence and machine learning approaches; and (iv) to roughly map the burden of cervical cancer in different districts and monitoring the trend in incidence of cervical cancer to potentially inform prevention and control strategies. Patients eligible for inclusion were those diagnosed with cervical cancer, whether during an outpatient visit or hospital admission, at 47 different types of medical institutions in 19 cities of 11 provinces across mainland China between 2004 and 2018. In a total, 63 926 patients with cervical cancer were enrolled in the cohort. Since the project inception, a large number of standardized variables have been collected, including epidemiological characteristics, cervical cancer-related symptoms, physical examination results, laboratory testing results, imaging reports, tumor biomarkers, tumor staging, tumor characteristics, comorbidities, co-infections, treatment and short-term complications. Follow-up was performed at least once every 6 months within the first 5 years after receiving treatment and then annually thereafter. At present, we are developing a cervical cancer imaging database containing Dicom files with data of computed tomography/magnetic resonance imaging examination. Additionally, we are also collecting original pathological specimens of patients with cervical cancer. Potential collaborators are welcomed to contact the corresponding authors, and anyone can submit at least one specific study proposal describing the background, objectives and methods of the study.

With the explosive growth of medical information, it is almost impossible for healthcare providers to review and evaluate all relevant evidence to make the best clinical decisions. Meta‐analyses, which summarize all existing evidence and quantitatively synthesize individual studies, have become the best available evidence for informing clinical practice. This article introduces the common methods, steps, principles, strengths and limitations of meta‐analyses and aims to help healthcare providers and researchers obtain a basic understanding of meta‐analyses in clinical practice and research., This article introduces the common methods, principles, steps, strengths and limitations of meta‐analyses and aims to help clinicians and researchers obtain a basic understanding of meta‐analyses in clinical practice and research.

The purpose of the study is to build a "virtual roller compactor" as a predictive tool to assess the roll force (RF)-maximum pressure (Pmax) and RF-ribbon density relationship for pharmaceutical roller compaction. We provided a theoretical basis to demonstrate that, there exists a critical nip angle for a pharmaceutical powder, beyond which the RF-Pmax relationship is insensitive to wall friction angle or effective angle of internal friction. We showed that for most pharmaceutical roller compaction, the critical nip angle is lower than 17 degree, and can be exceeded via wall friction elevation, using rolls with non-smooth surface. Under this condition, the original Johanson model can be substantially simplified to a single equation requiring only one material property (compressibility). By performing manufacturing-scale roller compaction using materials with diverse compressibility, we showed that the simplified, friction angle-free model performed similar to the original Johanson model. It can predict the RF-Pmax and RF-ribbon density relationship well after applying a correction factor. The predictive tool, in the form of a user-friendly graphical user interface, was created based on the simplified model. The tool was adopted for in-house, bench-scale formulation development and scale-up because of its ease-of-use, good predicting capability, and very low material demand.

Summary Background & aims The association between dietary diversity (DD) changes and mortality remains unclear. We aimed to investigate the association between DD changes and all-cause mortality among older people. Methods A total of 17,959 participants with a mean age of 84.8 years old were enrolled at baseline. Food groups were collected at baseline and follow-up using simplified food frequency questionnaire (FFQ), and then overall, plant-based and animal-based dietary diversity score (DDS) were calculated. DDS changes were calculated using DDS at baseline and the first follow-up. The association between three DDS changes (overall, plant-based and animal-based DDS) and subsequent all-cause mortality were evaluated. Nonparametrically restricted cubic splines and a multivariable-adjusted Cox proportional hazards model were used to estimate HRs and 95% CIs. Results We documented 12,974 deaths over a 129,590 person-years of follow up. Compared with high-to-high DDS pattern, participants with lower overall DDS patterns had increased mortality risk with HRs (95%CI) of 1.39 (1.29–1.49), 1.53 (1.37–1.70), 1.38 (1.18–1.60) and 1.55 (1.31–1.83) for medium-to-medium, low-to-low, low-to-high and high-to-low patterns, respectively. And compared with high-to-high DDS pattern, the estimates were 1.34 (1.23–1.46), 1.49 (1.35–1.65), 1.43 (1.23–1.67) and 1.62 (1.40–1.88) for plant-based DDS, and 1.23 (1.15–1.31), 1.29 (1.20–1.40), 1.24 (1.12–1.37) and 1.28 (1.15–1.44) for animal-based DDS for medium-to-medium, low-to-low, low-to-high and high-to-low patterns, respectively. There was a U-shaped association between DDS change scores and mortality, and compared with participants with whose DDS remained stable, those with extreme declines and extreme improvements had higher risks of mortality with HRs (95% CI) of 1.15 (1.09–1.22) and 1.11 (1.04–1.17). Conclusions Maintaining a lower DDS, extreme declines and extreme improvements in DDS were all associated with an increased risk of all-cause mortality.

Low-resolution face recognition is a challenging problem in the face recognition algorithm. Most face recognition algorithms have a significant reduction in recognition accuracy when facing low-resolution faces. In this paper, we propose a DCR(Deep Coupled ResNet) model based on super-resolution reconstruction, named SR-DCR model, to tackle this challenging. Firstly, we designed a super-resolution face reconstruction model based on the facial feature. The "perceptual loss + classification loss" is used as the loss function of the reconstructed network. And the facial feature is used to constrain the reconstruction process to make the reconstructed face more favorable for recognition. Then a series of improvements and adjustments were made to the DCR model. Improved the network structure of the main network, and its cross-layer connection method was changed to a close connection, which further promoted feature propagation in the network and enhanced feature reusability; The loss function of the main network is improved, and the improved "triplet loss" is used as a loss function to directly optimize the facial feature between high resolution and low-resolution, further enhancing the high and low resolution. The aggregation between facial features; at the same time, the training method of the DCR model is adjusted, and the steps of joint training between the main network and branch network are added to further optimize DCR network parameters. Finally, the super-resolution reconstruction and the improved DCR model are combined to recognize low-resolution faces. The performance of the proposed algorithm is compared with that of other advanced methods on LFW and SCFace datasets. Experimental results show that the algorithm improves the recognition rate by 3.5% based on DCR. Effectively improve the accuracy of face recognition at low resolution.

Highlights • The prevalence of anxiety and depression symptom was 7.7% and 12.2%, respectively. • Having confirmed and suspected cases in family members or relatives was associated with the higher risk of depression symptom. • Self-reported health condition was strongly associated with risk of anxiety and depression symptom., Background : Although studies have suggested experiencing the epidemic of severe infectious diseases increased the prevalence of mental health problems, the association between COVID-19 epidemic and risk of anxiety and depression symptom in college students in China was unclear. Methods : A large cross-sectional online survey with 44,447 college students was conducted in Guangzhou, China. The Zung's Self-rating Anxiety Scale (SAS) and the Center for Epidemiologic Studies Depression Scale (CES-D Scale) were used to define the anxiety and depression symptom, respectively. Multivariable logistic regression models were used to analyze the association between COVID-19 epidemic and risk of anxiety and depression symptom. Results : The prevalence of anxiety and depression symptom was 7.7% (95% confidence interval [CI]: 7.5%, 8.0%) and 12.2% (95%CI: 11.9%, 12.5%), respectively. Compared with students who reported have not infected or suspected cases in family members and relatives, students who reported having confirmed (OR=4.06; 95%CI: 1.62, 10.19; P=0.003), and suspected (OR=2.11; 95%CI: 1.11, 4.00; P=0.023) cases in family members and relatives had higher risk of depression symptom. Additionally, the proportions of students with anxiety and depression symptom reported more demand of psychological knowledge and interventions than those without (P

The purpose of this study is to assess the prevalence of funnel flow pattern for common pharmaceutical powder blends, upon discharging from modern intermediate bulk containers (IBCs) in drug product manufacturing. The estimation was built upon Jenike’s original radial stress field theory. It was modified to account for the stress-dependence of wall friction angle commonly observed in pharmaceutical powders. A total of 260 flow pattern estimations, based on 20 real-life IBCs and 13 investigational powder blends, were made. The estimated results showed that the mass flow pattern is present in less than 5% of all cases. Funnel flow pattern is clearly prevalent among pharmaceutical powder blends. The prevalence of funnel flow stems from several factors: 1) relatively shallow hopper section shared by all IBCs, 2) the common transition-type geometry, leading to even shallower hopper inclination at the edge of the hopper section, and 3) relatively high wall friction angles resulting from low wall normal stresses. This conclusion was verified through at-scale experiments, by discharging multiple pharmaceutical powder blends from a representative IBC. In general, our study suggests that, unless the powder wall friction can be substantially reduced, pharmaceutical powders are likely to discharge under funnel flow from modern IBCs.

As enterprise data management develops, business intelligence systems have obtained prevalence in innovative industries. It has proved to provide a complete set of solutions for enterprise data management. However, it features a series of obstacles requiring high learning costs. To overcome this, the paper integrates four elements of learning costs and proposes a user learning cost weakening model from the perspective of applied behavior analysis. Outcomes from the research suggest new ideas and strategies for reducing user learning costs for complicated enterprise-level data products.

Background: Research on the relationship between long-term exposure to particulate matter with aerodynamic diameter ≤2.5μm (PM2.5) and poor cognitive function is lacking in developing countries, especially in highly polluted areas. Objectives: We evaluated associations of long-term exposure to PM2.5 with poor cognitive function in a diverse, national sample of older adults in China. Methods: This analysis included data on 13,324 older adults (5,879 who were 65–79 years of age, 3,052 who were 80–89 years of age, 2,634 who were 90–99 years of age, and 1,759 who were ≥100 years of age) with normal cognitive function at baseline from March 2002 to September 2014, with 64,648 person-years of follow-up. We used a geographic information system analysis to estimate the annual average satellite-derived PM2.5 concentration for the geocoded location of the participants’ baseline residences. Poor cognitive function was defined as a score of less than 18 on the Chinese version of the Mini-Mental State Examination (MMSE). Competing risk models were performed to explore the association of PM2.5 with poor cognitive function. Results: Each 10-μg/m3 increase in PM2.5 was associated with a 5.1% increased risk of poor cognitive function [adjusted hazard ratio (HR): 1.051; 95% confidence interval (CI): 1.023, 1.079]. Compared to the lowest quartile of PM2.5 (

We appreciated Safiri and Mansournia for their interest and comment on our recent study.1 2 Safiri et al 1 mentioned that we did not explain the steps for the selection of confounders that have been included in our fully adjusted models. We acknowledged that due to the limited number of the words for the manuscript required by the journal, the content for the explanation for selection of confounders was not included. Actually, all confounders in our study were selected according to the published literature,3–5 and these were the most important risk factors for mortality. In total, 27 …

BackgroundRapid spread of SARS-CoV-2 in Wuhan prompted heightened surveillance in Guangzhou and elsewhere in China. Modes of contact and risk of transmission among close contacts have not been well estimated.MethodsWe included 4950 closes contacts from Guangzhou, and extracted data including modes of contact, laboratory testing, clinical characteristics of confirmed cases and source cases. We used logistic regression analysis to explore the risk factors associated with infection of close contacts.ResultsAmong 4950 closes contacts, the median age was 38.0 years, and males accounted for 50.2% (2484). During quarantine period, 129 cases (2.6%) were diagnosed, with 8 asymptomatic (6.2%), 49 mild (38.0%), and 5 (3.9%) severe to critical cases. The sensitivity of throat swab was 71.32% and 92.19% at first to second PCR test. Among different modes of contact, household contacts were the most dangerous in catching with infection of COVID-19, with an incidence of 10.2%. As the increase of age for close contacts and severity of source cases, the incidence of COVID-19 presented an increasing trend from 1.8% (0-17 years) to 4.2% (60 or over years), and from 0.33% for asymptomatic, 3.3% for mild, to 6.2% for severe and critical source cases, respectively. Manifestation of expectoration in source cases was also highly associated with an increased risk of infection in their close contacts (13.6%). Secondary cases were in general clinically milder and were less likely to have common symptoms than those of source cases.ConclusionsIn conclusion, the proportion of asymptomatic and mild infections account for almost half of the confirmed cases among close contacts. The household contacts were the main transmission mode, and clinically more severe cases were more likely to pass the infection to their close contacts. Generally, the secondary cases were clinically milder than those of source cases.

Background Dementia is a serious and growing health problem, and since most people with dementia live at home, caring responsibilities generally fall on family members. Caregivers are often inadequately supported by formal health services and have poorer psychological and physical health. Our study aimed to compare the contributions of publications from different countries, institutions and authors and present a bibliometric analysis to determine the hotspots and trends in research concerning the health of and interventions for family dementia caregivers. Methods Studies published during 1988–2018 were extracted from the Science Citation Index Expanded of the Web of Science. Each abstract of publications was evaluated to obtain the basic information. A bibliometric analysis was used to evaluate the number or cooperation networks of publications, countries, institutions, journals, citations, authors, references, and keywords. The resulting articles were analyzed descriptively, and the publication keywords were visualized using VOSviewer. Results Five hundred forty-two articles were identified. The annual number of relevant publications has steadily increased since approximately 2006. The USA has the highest number of publications (36.2%), followed by the UK (12.9%). China entered the field late, but research conducted in China has rapidly developed. The most productive institution, journal, and author in this field are University College London, the Journal of the American Geriatrics Society, and Orrell M from the UK, respectively. A co-occurrence analysis of the keywords reveals a mainstream research focus on burden, depression, quality of life, and corresponding interventions for people with dementia caregivers. The keywords “psychosocial intervention”, “long-term”, “e-learning/online”, “communication”, and “qualitative research” reflect the latest hotspots, appearing in approximately 2017–2018. Conclusion Our study details the performance statistics, main topics and trends research on the health of and interventions for dementia caregivers from 1988 to 2018 and provides a comprehensive analysis.

Currently the Chinese government has adopted World Health Organization interim target-1 values as the national ambient air quality standards values. However, the population-based evidence was insufficient, especially for the oldest old (aged 80+). We evaluated the association of fine particulate matters (PM(2.5)) exposure and incidence of disability in activities of daily living (ADL) in 15 453 oldest old in 886 counties/cities in China from 2002 to 2014 using Cox model with penalized splines and competing risk models to evaluate the linear or non-linear association. After adjusting for potential confounders, a J-shaped association existed between PM(2.5) exposure with a threshold concentration of 33 μg/m(3), and incident disability in ADL. Above this threshold, the risk magnitude significantly increased with increase of PM(2.5) concentrations; compared to 33 μg/m(3), the hazard ratio ranged from 1.03 (1.00-1.06) at 40 μg/m(3) to 2.25 (1.54-3.29) at 110 μg/m(3). The risk magnitude was not significantly changed below this threshold. Each 10 μg/m(3) increase in PM(2.5) exposure corresponded to a 7.7% increase in the risk of disability in ADL (hazard ratio 1.077, 95% CI 1.051-1.104). Men, smokers, and participants with cognitive impairment might be more vulnerable to PM(2.5) exposure. The study provided limited population-based evidence for the oldest old and detected a threshold of 33 μg/m(3), and supported that reduction to current World Health Organization interim target-1value (35 μg/m(3)) and Chinese national ambient air quality standards (35 μg/m(3)) or lower may be associated with lower risk of disability in ADL.

Background: Some cases retested positive for SARS-CoV-2 following negative testing results and discharge, which attracted widespread concern. However, the potential risk factors associated with re-detectable positive tests in a large sample of cases who recovered from COVID-19 has not been well estimated. Methods: A total of 745 discharged COVID-19 cases were enrolled between 30 January and 9 September 2020 in Guangzhou, China. Data on the clinical characteristics, comorbidities, drug therapy, RT-PCR testing, and contact modes to close contacts were collected. Re-positive cases were confirmed by guidelines issued by China. The re-positive rate of in different settings was calculated. Univariable and multivariable logistic regression models were used to explore the potential risk factors associated with COVID-19 re-positivity. Findings: Among 745 discharged cases, 157 (21.1%; 95%CI, 18.2% to 24.0%) were retested positive with 55 (35.0%) of asymptomatic, 15 (9.6%) of mild, 83 (52.9%) of moderate and 4 (2.6%) of severe at the first admission. The median time from discharge to re-positivity was 8.0 days (IQR, 8.0 to 14.0 days). Most re-positive cases were without clinical symptoms and lymphocyte cell counts increased than before. The likelihood of re-positive testing for SARS-CoV-2 RNA was significantly higher among cases with younger age (OR, 3.88; 95%CI, 1.74 to 8.66, 0 to 17 years old), asymptomatic severity (OR, 4.36; 95%CI, 1.47 to 12.95) and without clinical symptoms (OR, 1.89; 95%CI, 1.32 to 2.70, without fever). Interpretation: We found that the re-positive rate of COVID-19 was relatively high, and they were re-tested positive with median days 8.0 to 14.0 post-discharge. Re-positive results were mainly observed in young cases without severe clinical symptoms. These findings suggest that a significant proportion of cases could carry virus fragments for a long time, and effective management, such as prolonged quarantine phase of discharged cases, is necessary. Funding Statement: The Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme; the Construction of High-level University of Guangdong; Young Elite Scientists Sponsorship Program by CAST; the National Natural Science Foundation of China; the Zhejiang University special scientific research fund for COVID-19 prevention and control. Declaration of Interests: We declare no competing interests. Ethics Approval Statement: This study was reviewed and approved by the Ethics Committee of GZCDC. As required by the National Health Commission of China, CDCs were responsible for the work for an ongoing public health response to COVID-19, and our cohort study was based on the data by GZCDC. Patients were informed about the surveillance before providing written consent, and data were collected and anonymized for analysis. All analysis of personally identifiable data took place onsite at the GZCDC.

Roll compaction technologies have advanced substantially over the past decade and are increasingly adapted by formulation scientists as a preferred means of granulation. This chapter presents recent progress in pharmaceutical roll compaction with respect to the following three key aspects: formulation development, process modeling, and equipment. On the modeling front, we outline various continuum-based modeling efforts and their role in furthering the fundamental, mechanistic understanding of the process. Here, we discuss the significant body of work that has been derived from the rolling theory for granular solids, focusing on both the quantities that that model predicts accurately and the reasons it recurrently falls short in predicting various process outcomes, as well as the rise of high-fidelity computational simulations and their potential to overcome the shortcomings of the rolling theory. With regard to the formulation development aspects of the process, common pharmaceutical excipients and their impact on the resulting ribbon and granule qualities are discussed. Lastly, we present the current state of the art in equipment design and process control that enable the processing of a wide variety of pharmaceutical powders. Emphases are placed on different roll compactor options and their ability to precisely control the roll force and roll gap, perform efficient deaeration, and minimize powder leakage.

Background: Rapid spread of SARS-CoV-2 in Wuhan prompted heightened surveillance in Guangzhou and elsewhere in China Modes of contact and risk of transmission

This study was to investigate prevalence of depression among migrant hypertensive patients in primary care and to examine hypertensive patients' social capital and its relationship with the prevalence of depression. An on-site-based cross-sectional study was performed in Shenzhen, China. A total of 830 migrant hypertensive patients completed the survey by using systematic sampling design. A questionnaire including information of depressive symptoms and social capital was administered by face-to-face interview surveys. We found that the prevalence of depression was 11.0% among migrant hypertensive patients in primary care. Social ties (odds ratio = 1.197, 95% confidence interval: 1.034, 1.387) and trust (odds ratio = 2.061, 95% confidence interval: 1.342, 3.165) were statistically significant associated with the prevalence of depression. Our study shows that the prevalence of depression is high among migrant hypertensive patients in primary care. It also suggests an inverse association between social capital and depression among migrant hypertensive patients. Although causal pathways between social capital and depression cannot be established by the present study, it is plausible to design and implement social interventions to improve mental health of migrant hypertensive patients in primary care.

Very fast transient overvoltage (VFTO) engenders great threat to gas-insulated switchgear (GIS) in ultra-high-voltage (UHV) power system. A novel conical voltage sensor was developed based on combination of the conical voltage divider and coaxial integral device to measure VFTO in UHV GIS. The results indicate that the conical structure of the voltage sensor can make the wave impedance translate smoothly from the high-voltage arm to the coaxial cable, which significantly reduces refraction and reflection of VFTO. The optimum value of the integral capacitance is between 100 and 200 pF, which is determined by the integral resistance, capacitance of the sensor, and the length of the transmission line. To avoid refraction and reflection of VFTO in the process of transmission, the length of the transmission cable should not exceed 20 cm. Calibration results show that the response time of the conical voltage sensor is