Search

Objective. Perceived control refers to an individual's subjective perception, affective experience, or cognitive beliefs regarding their level of control. The objective of this study was to examine the relationship between perceived control and quality of life (QoL) among breast cancer (BC) patients using a structural equation model. Method. Participants (N = 80) completed questionnaire surveys on perceived control and QoL using the Cancer Experience and Efficacy Scale (CEES) and the Quality of Life Questionnaire Core 30 (EORTC QLQ-C30 V3.0), respectively. Structural equation modeling was employed to examine the associations between perceived control factors, including cancer experience and control efficacy, and QoL. Results. The QoL in BC patients was found to be significantly negatively correlated with physical symptoms, accounting for 51.6%. This indicates that the QoL of patients decreased by 51.6% with each unit increase in physical symptoms. In terms of perceived control among BC patients, socioeconomic strain exerted the greatest influence on cancer experience, accounting for 44.3%, followed by emotional strain and personal strain at 40.08% and 34.6%, respectively. Group efficacy had the highest impact on control efficacy at 43.0%, followed by individual efficacy and medical efficacy at 41.8% and 29.7%, respectively. QoL in BC patients decreased by 4.2% with every unit increase in cancer experience but improved by 3.5% with every unit increase in control efficacy. Conclusion. The structural equation model facilitates a comprehensive understanding of the interrelationships among various variables in perceived control and QoL among BC patients. The cancer experience in perceived control is negatively correlated with the QoL, whereas control efficiency demonstrates a positive correlation with QoL. Consequently, healthcare professionals should implement appropriate interventions to alleviate physical symptoms and enhance control efficiency, thereby improving both perceived control and QoL levels among BC patients. This trial is registered with ChiCTR2300069476. [ABSTRACT FROM AUTHOR]

Background: Longevity can be regarded as a multifactorial trait that results from an interaction between environmental factors and sets of epistatic alleles that have pleiotropic age-dependent effects. The Hotan district in the Xin Jiang Uighur Autonomous region of China is relatively isolated and is well known for an ethnic group that displays marked longevity.Methods: We performed a correlation study between the insertion/deletion (I/D) polymorphism of the angiotensin-converting enzyme (ACE) gene and longevity by comparing distributions of the polymorphism between three different ethnic groups in this region. We obtained data from 424 subjects comprising 227 Uighur individuals, 108 Kazakh individuals, and 89 Han individuals. All subjects in the latter two groups ranged in age from 65 to 70 years, whereas the Uighur subjects actually comprised two different age groups: those ranging in age from 59 to 70 years (Uighur older group in Hotan [UOH]) and those ranging in age from 90 to 113 years (Uighur longevity group in Hotan [ULH]). Genomic DNA was extracted from peripheral white blood cells. Polymerase chain reaction was performed to amplify the I/D polymorphic region of the ACE gene.Results: Frequencies of the insertion (I) and deletion (D) alleles were 0.596 (243/408) and 0.404 (165/408) in the Uighur group, 0.606 (130/216) and 0.394 (85/216) in the Kazakh group, and 0.657 (117/178) and 0.343 (61/178) in the Han group. The overall distributions of alleles in these three groups did not differ significantly (chi(2) = 4.6, p =.33). Within the Uighur group, frequency of the D allele was significantly higher in the ULH group (0.448) than in the UOH group (0.355) (p <.04).Conclusions: This association reflects a genetic influence on differential survival and may point to pleiotropic age-dependent effects on longevity. Our data may help elucidate the relationship between natural longevity and race difference among individuals in the Xin Jiang Uighur Autonomous region of China. [ABSTRACT FROM AUTHOR]