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Highlights • This is the first meta-analysis of individual data in chronic Trypanosoma cruzi infection after treatment. • The probability of seroreversion is variable along the course of follow-up. • An interaction was found between age at treatment and country setting. • The course of parasitological/molecular tests after treatment needs to be assessed., Objective To determine the course of serological tests in subjects with chronic Trypanosoma cruzi infection treated with anti-trypanosomal drugs. Methods A systematic review and meta-analysis was conducted using individual participant data. Survival analysis and the Cox proportional hazards regression model with random effects to adjust for covariates were applied. The protocol was registered in the PROSPERO database (http://www.crd.york.ac.uk/PROSPERO; CRD42012002162). Results A total of 27 studies (1296 subjects) conducted in eight countries were included. The risk of bias was low for all domains in 17 studies (63.0%). Nine hundred and thirteen subjects were assessed (149 seroreversion events, 83.7% censored data) for enzyme-linked immunosorbent assay (ELISA), 670 subjects (134 events, 80.0% censored) for indirect immunofluorescence assay (IIF), and 548 subjects (99 events, 82.0% censored) for indirect hemagglutination assay (IHA). A higher probability of seroreversion was observed within a shorter time span in subjects aged 1–19 years compared to adults. The chance of seroreversion also varied according to the country where the infection might have been acquired. For instance, the pooled adjusted hazard ratio between children/adolescents and adults for the IIF test was 1.54 (95% confidence interval 0.64–3.71) for certain countries of South America (Argentina, Bolivia, Chile, and Paraguay) and 9.37 (95% confidence interval 3.44–25.50) for Brazil. Conclusions The disappearance of anti-T. cruzi antibodies was demonstrated along the course of follow-up. An interaction between age at treatment and country setting was found.

Objective To assess the accuracy of angiogenic biomarkers to predict pre-eclampsia. Design Prospective multicentre study. From 2006 to 2009, 5121 pregnant women with risk factors for pre-eclampsia (nulliparity, diabetes, previous pre-eclampsia, chronic hypertension) from Argentina, Colombia, Peru, India, Italy, Kenya, Switzerland and Thailand had their serum tested for sFlt-1, PlGF and sEng levels and their urine for PlGF levels at ⩽20, 23–27 and 32–35 weeks’ gestation (index tests, results blinded from carers). Women were monitored for signs of pre-eclampsia, diagnosed by systolic blood pressure ⩾140 mmHg and/or diastolic blood pressure ⩾90 mmHg, and proteinuria (protein/creatinine ratio ⩾0.3, protein ⩾1 g/l, or one dipstick measurement ⩾2+) appearing after 20 weeks’ gestation. Early pre-eclampsia was defined when these signs appeared ⩽34 weeks’ gestation. Main outcome measure Pre-eclampsia. Results Pre-eclampsia was diagnosed in 198 of 5121 women tested (3.9%) of whom 47 (0.9%) developed it early. The median maternal serum concentrations of index tests were significantly altered in women who subsequently developed pre-eclampsia than in those who did not. However, the area under receiver operating characteristics curve at ⩽20 weeks’ gestation were closer to 0.5 than to 1.0 for all biomarkers both for predicting any pre-eclampsia or at ⩽34 weeks’ gestation. The corresponding sensitivity, specificity and likelihood ratios were poor. Multivariable models combining sEng with clinical features slightly improved the prediction capability. Conclusions Angiogenic biomarkers in first half of pregnancy do not perform well enough in predicting the later development of pre-eclampsia.

Objective To determine the relationship of interpregnancy interval with maternal and offspring outcomes. Design Retrospective study with data from the Perinatal Information System database of the Latin American Centre for Perinatology and Human Development, Uruguay. Setting Latin America, 1990–2009. Population A cohort of 894 476 women delivering singleton infants. Methods During 1990–2009 the Perinatal Information System database of the Latin American Centre for Perinatology identified 894 476 women with defined interpregnancy intervals: i.e. the time elapsed between the date of the previous delivery and the first day of the last normal menstrual period for the index pregnancy. Using the interval 12–23 months as the reference category, multiple logistic regression estimated adjusted odds ratios (aORs) with 95% confidence intervals (95% CIs) of the association between various interval lengths and maternal and offspring outcomes. Main outcome measures Maternal death, pre-eclampsia, eclampsia, puerperal infection, fetal death, neonatal death, preterm birth, and low birthweight. Results In the reference interval there was 0.05% maternal death, 1.00% postpartum haemorrhage, 2.80% pre-eclampsia, 0.15% eclampsia, 0.28% puerperal infection, 3.45% fetal death, 0.68% neonatal death, 12.33% preterm birth, and 9.73% low birthweight. Longer intervals had increased odds of pre-eclampsia (>72 months), fetal death (>108–119 months), and low birthweight (96–107 months). Short intervals of

Background Every year millions of women around the world suffer from pregnancy, childbirth and postpartum complications. Women who survive the most serious clinical conditions are regarded as to have experienced a severe acute maternal complication called maternal near miss (MNM). Information about MNM cases may complement the data collected through the analysis of maternal death, and was proposed as a helpful tool to identify strengths and weaknesses of health systems in relation to maternal health care. The purpose of this study is to evaluate the performance of a systematized form to detect severe maternal outcomes (SMO) in 20 selected maternity hospitals from Latin America (LAC). Methods Cross-sectional study. Data were obtained from analysis of hospital records for all women giving birth and all women who had a SMO in the selected hospitals. Univariate and multivariate adjusted logistic regression models were used to assess the predictive ability of different conditions to identify SMO cases. In parallel, external auditors were hired for reviewing and reporting the total number of discharges during the study period, in order to verify whether health professionals at health facilities identified all MNM and Potentially life-threatening condition (PLTC) cases. Results Twenty hospitals from twelve LAC were initially included in the study and based on the level of coverage, 11 hospitals with a total of 3,196records were included for the final analysis. The incidence of SMO and MNM outcomes was 12.9 and 12.3 per 1,000 live births, respectively. The ratio of MNM to maternal death was 19 to 1, with a mortality index of 5.1 %. Both univariate and multivariate analysis showed a good performance for a number of clinical and laboratory conditions to predict a severe maternal outcome, however, their clinical relevance remains to be confirmed. Coherence between health professionals and external auditors to identify SMO was high (around 100 %). Conclusions The form tested, was well accepted by health professionals and was capable of identifying 100 % of MNM cases and more than 99 % of PLTC variables. Altered state of consciousness, oliguria, placenta accrete, pulmonary edema, and admission to Intensive Care Unit have a high (LR+ ≥80) capacity to anticipate a SMO. Electronic supplementary material The online version of this article (doi:10.1186/s12978-016-0250-9) contains supplementary material, which is available to authorized users.

Introduction. Medicinal iron supplementation is a free and widely used intervention to prevent and treat childhood anemia. Objectives. To determine the prevalence of anemia in a sample of children from Rosario, to describe the use of iron supplements in children included in the studied sample, and to illustrate variables potentially related to mothers’ adherence to oral iron administration. Population and methods. A cross-sectional study involving mothers and infants younger than 42 months old assisted by the public health network of Rosario from December 2011 to April 2012 was conducted. Sociodemographic variables and data on children’s health, growth, anemia, and iron administration were collected. A rapid test was used to determine hemoglobin level. Results. A total of 325 mother-infant dyads were included. The overall prevalence of anemia was 40% (95% CI: 35-45%), and it increased up to 56% in the 6-23 month old group. Fifty-one percent of mothers reported that their children had at some time received iron. Mothers’ adherence to oral iron administration was higher in the group of children without anemia in comparison to those with anemia (OR: 0.28; 95% CI: 0.1-0.69). The most common causes for lack of adherence included gastrointestinal intolerance (38%) and forgetfulness (36%). Conclusions. Prevalence of childhood anemia in the studied sample was high. A lower mothers’ adherence to iron administration was observed in the group of children with anemia.

Introduction Medicinal iron supplementation is a free and widely used intervention to prevent and treat childhood anemia. Objectives To determine the prevalence of anemia in a sample of children from Rosario, to describe the use of iron supplements in children included in the studied sample, and to illustrate variables potentially related to mothers' adherence to oral iron administration. Population and methods A cross-sectional study involving mothers and infants younger than 42 months old assisted by the public health network of Rosario from December 2011 to April 2012 was conducted. Sociodemographic variables and data on children's health, growth, anemia, and iron administration were collected. A rapid test was used to determine hemoglobin level. Results A total of 325 mother-infant dyads were included. The overall prevalence of anemia was 40% (95% CI: 35-45%), and it increased up to 56% in the 6-23 month old group. Fifty-one percent of mothers reported that their children had at some time received iron. Mothers' adherence to oral iron administration was higher in the group of children without anemia in comparison to those with anemia (OR: 0.28; 95% CI: 0.1-0.69). The most common causes for lack of adherence included gastrointestinal intolerance (38%) and forgetfulness (36%). Conclusions Prevalence of childhood anemia in the studied sample was high. A lower mothers' adherence to iron administration was observed in the group of children with anemia.

Postpartum haemorrhage (PPH) is an important cause of maternal mortality. We conducted a systematic review of the prevalence of PPH with the objective of evaluating its magnitude both globally and in different regions and settings: global figures, as well as regional, country and provincial variations, are likely to exist but are currently unknown. We used prespecified criteria to select databases, recorded the database characteristics and assessed their methodological quality. After establishing PPH (>or=500 mL blood loss) and severe PPH (SSPH) (>or=1000 mL blood loss) as main outcomes, we found 120 datasets (involving a total of 3,815,034 women) that reported PPH and 70 datasets (505,379 women) that reported SPPH in the primary analysis. The prevalence of PPH and SPPH is approximately 6% and 1.86% of all deliveries, respectively, with a wide variation across regions of the world. The figures we obtained give a rough estimate of the prevalence of PPH and suggest the existence of some variations. For a reliable picture of PPH worldwide - its magnitude, distribution and consequences - a global survey tackling this condition is necessary.

NICHD NIH HHS World Health Organization ObjectiveTo generate a global reference for caesarean section (CS) rates at health facilities. DesignCross-sectional study. SettingHealth facilities from 43 countries. Population/SampleThirty eight thousand three hundred and twenty-four women giving birth from 22 countries for model building and 10045875 women giving birth from 43 countries for model testing. MethodsWe hypothesised that mathematical models could determine the relationship between clinical-obstetric characteristics and CS. These models generated probabilities of CS that could be compared with the observed CS rates. We devised a three-step approach to generate the global benchmark of CS rates at health facilities: creation of a multi-country reference population, building mathematical models, and testing these models. Main outcome measuresArea under the ROC curves, diagnostic odds ratio, expected CS rate, observed CS rate. ResultsAccording to the different versions of the model, areas under the ROC curves suggested a good discriminatory capacity of C-Model, with summary estimates ranging from 0.832 to 0.844. The C-Model was able to generate expected CS rates adjusted for the case-mix of the obstetric population. We have also prepared an e-calculator to facilitate use of C-Model (). ConclusionsThis article describes the development of a global reference for CS rates. Based on maternal characteristics, this tool was able to generate an individualised expected CS rate for health facilities or groups of health facilities. With C-Model, obstetric teams, health system managers, health facilities, health insurance companies, and governments can produce a customised reference CS rate for assessing use (and overuse) of CS. Tweetable abstractThe C-Model provides a customized benchmark for caesarean section rates in health facilities and systems. Tweetable abstract The C-Model provides a customized benchmark for caesarean section rates in health facilities and systems. Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Social Med, Av Bandeirantes, BR-3900 Ribeirao Preto, Brazil WHO, World Bank Special Programme Res Dev & Res Traini, UNDP UNFPA UNICEF WHO, Dept Reprod Hlth & Res, CH-1211 Geneva, Switzerland Univ Paris 05, Sorbonne Paris Cite, UMR 216, Inst Dev Res, Paris, France WHO Reg Off Amer, Women & Reprod Hlth CLAP WR, Latin Amer Ctr Perinatol, Montevideo, Uruguay Emory Univ, Rollins Sch Publ Hlth, Dept Epidemiol, Atlanta, GA 30322 USA Paris Descartes Univ, Ctr Epidemiol & Biostat, Obstetr Perinatal & Pediat Epidemiol Res Team, Inserm U1153, Paris, France Natl Inst Publ Hlth, Ctr Populat Hlth Res, Cuernavaca, Morelos, Mexico Univ Technol, Fac Hlth, Sydney, NSW, Australia Natl Ctr Child Hlth & Dev, Dept Hlth Policy, Tokyo, Japan Ctr Rosarino Estudios Perinat, Rosario, Argentina Lindsay Stewart R&D Ctr, Off Res & Clin Audit, Royal Coll Obstetricians & Gynaecologists, London, England London Sch Hyg & Trop Med, Dept Hlth Serv Res & Policy, London WC1, England Shanghai Jiao Tong Univ, Sch Med, Xinhua Hosp, Shanghai Key Lab Childrens Environ Hlth,Minist Ed, Shanghai 200030, Peoples R China Univ Estadual Campinas, Sch Med Sci, Dept Obstet & Gynaecol, Campinas, SP, Brazil Family Hlth Bur, Minist Hlth, Colombo, Sri Lanka Fiocruz MS, ENSP, BR-21045900 Rio De Janeiro, Brazil Natl Inst Hlth & Welf, Helsinki, Finland Univ Tokyo, Grad Sch Med, Dept Paediat, Tokyo, Japan Bayer Krankenhausgesellschaft, Bayer Arbeitsgemeinschaft Qualitatssicherun Stati, Munich, Germany Khon Kaen Univ, Fac Med, Dept Obstet & Gynecol, Khon, Kaen, Thailand Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Obstet & Gynaecol, BR-14049 Ribeirao Preto, Brazil Minist Sante, Direct Sante Famille, Ouagadougou, Burkina Faso Univ Washington, Inst Hlth Metr & Evaluat, Seattle, WA 98195 USA Univ Mongolia, Hlth Sci, Sch Publ Hlth, Ulaanbaatar, Mongol Peo Rep GLIDE Tech Cooperat & Res, Ribeirao Preto, SP, Brazil Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Paediat, BR-14049 Ribeirao Preto, SP, Brazil Univ Calif San Francisco, Dept Obstet & Gynaecol & Global Hlth Sci, San Francisco, CA 94143 USA Khon Kaen Univ, Fac Publ Hlth, Dept Biostat & Demog, Khon Kaen, Thailand Univ Fed Sao Paulo, Sch Med Sao Paulo, Dept Obstet, Sao Paulo, Brazil Inter Amer Dev Bank, Social Protect & Hlth Div, Mexico City, DF, Mexico Fortis Mem Res Inst, Gurgaon, Haryana, India Hosp Nacl Itaugua, Itaugua, Paraguay Univ Fed Sao Paulo, Sch Med Sao Paulo, Dept Obstet, Sao Paulo, Brazil NICHD NIH HHS: T32 HD052460 World Health Organization: 001 Web of Science

OBJECTIVE: To assess the incidence of hypertensive disorders of pregnancy and related severe complications identify other associated factors and compare maternal and perinatal outcomes in women with and without these conditions. DESIGN: Secondary analysis of the World Health Organization Multicountry Survey on Maternal and Newborn Health (WHOMCS) database. SETTING: Cross-sectional study implemented at 357 health facilities conducting 1000 or more deliveries annually in 29 countries from Africa Asia Latin America and the Middle East. POPULATION: All women suffering from any hypertensive disorder during pregnancy the intrapartum or early postpartum period in the participating hospitals during the study period. METHODS: We calculated the proportion of the pre-specified outcomes in the study population and their distribution according to hypertensive disorders severity. We estimated the association between them and maternal deaths near-miss cases and severe maternal complications using a multilevel logit model. MAIN OUTCOME MEASURES: Hypertensive disorders of pregnancy. Potentially life-threatening conditions among maternal near-miss cases maternal deaths and cases without severe maternal outcomes. RESULTS: Overall 8542 (2.73%) women suffered from hypertensive disorders. Incidences of pre-eclampsia eclampsia and chronic hypertension were 2.16% 0.28% and 0.29% respectively. Maternal near-miss cases were eight times more frequent in women with pre-eclampsia and increased to up to 60 times more frequent in women with eclampsia when compared with women without these conditions. CONCLUSIONS: The analysis of this large database provides estimates of the global distribution of the incidence of hypertensive disorders of pregnancy. The information on the most frequent complications related to pre-eclampsia and eclampsia could be of interest to inform policies for health systems organisation. (c) 2014 RCOG The World Health Organization retains copyright and all other rights in the manuscript of this article as submitted for publication.

Background Mode of delivery remains a topic of debate in vertex/non-vertex twin pregnancies. We used the WHO Global Survey dataset to determine the risk of adverse maternal/perinatal outcomes associated with presentation of the second twin, following vaginal delivery of a vertex first twin. Methods We analysed a derived dataset of twin pregnancies ≥ 32 weeks gestation where the first twin was vertex and delivered vaginally. Maternal, delivery and neonatal characteristics and adverse outcomes were reported by presentation of the second twin. Logistic regression models (adjusted for maternal and perinatal confounders, mode of delivery and region) were developed to determine odds of adverse outcomes associated with presentation. Results 1,424 twin pregnancies were included, 25.9% of these had a non-vertex second twin and Caesarean was more common in non-vertex presentations (6.2% vs 0.9%, p

La función generalizada de variancia (FGV) es un método muy difundido entre organismos gubernamentales encargados de dirigir y planificar encuestas de gran magnitud, que permite obtener de manera sencilla el error muestral de una estimación dada. Consiste en un modelo que pretende reproducir la relación entre un estimador y alguna medida de su variación, por ejemplo la Variancia Relativa (VR). Si bien pueden plantearse varios modelos para la FGV, en la práctica usualmente se consideran dos modelos muy simples (modelo lineal y modelo logarítmico). En este trabajo se explora el uso de otro modelo, basado en la regresión spline penalizada (P-spline). Se comparan dichos modelos utilizando datos provistos por la Dirección General de Estadística y Censos de la Ciudad Autónoma de Buenos Aires. Para ello se utilizarán las estimaciones de totales de características de interés provenientes de la “Encuesta Anual de Hogares” realizada por dicho organismo, correspondiente al año 2010. Fil: Cuesta, Cristina Beatriz. Instituto de Investigaciones Teóricas y Aplicadas de la Escuela de Estadística. Facultad de Ciencias Económicas y Estadística, Universidad Nacional de Rosario; Argentina. Fil: Mari, Gonzalo. Instituto de Investigaciones Teóricas y Aplicadas de la Escuela de Estadística. Facultad de Ciencias Económicas y Estadística, Universidad Nacional de Rosario; Argentina. Fil: Rivero, Matias. Dirección General de Estadística y Censos de la Ciudad Autónoma de Buenos Aires; Argentina

Reduction of maternal mortality is a target within the Millennium Development Goals. Data on the incidence of preeclampsia and eclampsia, one of the main causes of maternal deaths, are required at both national and regional levels to inform policies. We conducted a systematic review of the incidence of hypertensive disorders of pregnancy (HDP) with the objective of evaluating its magnitude globally and in different regions and settings. We selected studies using pre-specified criteria, recorded database characteristics and assessed methodological quality of the eligible studies reporting incidence of any HDP during the period 2002-2010. A logistic model was then developed to estimate the global and regional incidence of HDP using pre-specified predictor variables where empiric data were not available. We found 129 studies meeting the inclusion criteria, from which 74 reports with 78 datasets reporting HDP were analysed. This represents nearly 39 million women from 40 countries. When the model was applied, the overall estimates are 4.6% (95% uncertainty range 2.7-8.2), and 1.4% (95% uncertainty range 1.0-2.0) of all deliveries for preeclampsia and eclampsia respectively, with a wide variation across regions. The figures we obtained give a general idea of the magnitude of the problem and suggest that some regional variations might exist. The absence of data in many countries is of concern, however, and efforts should be made to implement data collection and reporting for substantial statistics. The implementation of large scale surveys conducted during a short period of time could provide more reliable and up-to-date estimations to inform policy.

One approach to analyse geographic variations of a disease within a country is through mortality rates in administrative areas. In some geographical areas the rates can be unstable due to their low population. Thus, the statistical analysis of the rate could be not significant due to low population, not because of the real value. An alternative approach to this problem is to set a minimum level of population that enables valid statistical comparisons with the national rate to be made. It is decided to apply an algorithm that groups neighbouring geographical units that reach the minimum population. In the resulting regions, mortality rates are calculated, and the geographic patterns are analysed through the Moran's I coefficient of spatial clustering. This paper presents an application of this approach to mortality rates from breast cancer by Argentine departments, political administrative units into which a province is divided. Applying this procedure, 217 regions were obtained. In two of the regions the rates were significantly higher than the national rate, while in 40 regions they were significantly lower. Significant spatial grouping, reflected by a Moran I coefficient of O-47, was observed.

Summary Background We report the main findings of the WHO Multicountry Survey on Maternal and Newborn Health (WHOMCS), which aimed to assess the burden of complications related to pregnancy, the coverage of key maternal health interventions, and use of the maternal severity index (MSI) in a global network of health facilities. Methods In our cross-sectional study, we included women attending health facilities in Africa, Asia, Latin America, and the Middle East that dealt with at least 1000 childbirths per year and had the capacity to provide caesarean section. We obtained data from analysis of hospital records for all women giving birth and all women who had a severe maternal outcome (SMO; ie, maternal death or maternal near miss). We regarded coverage of key maternal health interventions as the proportion of the target population who received an indicated intervention (eg, the proportion of women with eclampsia who received magnesium sulphate). We used areas under the receiver operator characteristic curves (AUROC) with 95% CI to externally validate a previously reported MSI as an indicator of severity. We assessed the overall performance of care (ie, the ability to produce a positive effect on health outcomes) through standardised mortality ratios. Results From May 1, 2010, to Dec 31, 2011, we included 314 623 women attending 357 health facilities in 29 countries (2538 had a maternal near miss and 486 maternal deaths occurred). The mean period of data collection in each health facility was 89 days (SD 21). 23 015 (7·3%) women had potentially life-threatening disorders and 3024 (1·0%) developed an SMO. 808 (26·7%) women with an SMO had post-partum haemorrhage and 784 (25·9%) had pre-eclampsia or eclampsia. Cardiovascular, respiratory, and coagulation dysfunctions were the most frequent organ dysfunctions in women who had an SMO. Reported mortality in countries with a high or very high maternal mortality ratio was two-to-three-times higher than that expected for the assessed severity despite a high coverage of essential interventions. The MSI had good accuracy for maternal death prediction in women with markers of organ dysfunction (AUROC 0·826 [95% CI 0·802–0·851]). Interpretation High coverage of essential interventions did not imply reduced maternal mortality in the health-care facilities we studied. If substantial reductions in maternal mortality are to be achieved, universal coverage of life-saving interventions need to be matched with comprehensive emergency care and overall improvements in the quality of maternal health care. The MSI could be used to assess the performance of health facilities providing care to women with complications related to pregnancy. Funding UNDP–UNFPA–UNICEF–WHO–World Bank Special Programme of Research, Development and Research Training in Human Reproduction (HRP); WHO; USAID; Ministry of Health, Labour and Welfare of Japan; Gynuity Health Projects.

Objectives Assess the accuracy of serum soluble fms-like tyrosine kinase 1 (sFlt-1), placental growth factor (PlGF) and soluble endoglin (sEng) and urinary PlGF as predictors of preeclampsia in a prospective multicountry study. Methods From 2006-9, 5121 pregnant women from centers in Argentina, Colombia, India, Italy, Kenya, Peru, Switzerland and Thailand had their serum tested for sFlt-1, PlGF and sEng levels and their urine for PlGF levels at ⩽20 (index tests, results kept blind from care givers), 23–27 and 32–35 weeks’ gestation. During prenatal care, women were closely monitored for signs of preeclampsia, diagnosed by systolic blood pressure ⩾140 mmHg and/or diastolic blood pressure ⩾90 mmHg, and proteinuria with protein/creatinine ratio ⩾0.3, protein ⩾1 g/l or, one dipstick measurement ⩾2+ appearing after gestational week 20, and defined as early preeclampsia when these signs appeared before 34 weeks’ gestation. Results Preeclampsia was diagnosed in 3.9% (198 of the 5121 women) whom 47 (0.9%) had early disease. No test performed well at Conclusions Angiogenic biomarkers, alone or combined with clinical risk factors, performed poorly as predictors of preeclampsia, when measured early in pregnancy ( Disclosures M. Widmer: None. C.B. Cuesta: None. K. Khan: None. A.M. Gulmezoglu: None. S.A. Karumanchi: Consultant: Roche, Beckman, Siemens. M.D. Lindheimer: None.