The Center for Epidemiologic Studies Depression Scale–Revised (CESD-20-R): factorial validity and gender invariance among Nigerian young adults

Psychometric characteristics of the Center for Epidemiologic Studies Depression Scale-Revised in a population of Polish university students

The Center for Epidemiologic Studies Depression Scale-Revised (CESD-R) has already been validated on the Polish population. However, the structure of the scale obtained at that time was not confirmed by confirmatory factor analysis (CFA) in subsequent studies on the Polish sample and measurement invariance for gender was not performed. The purpose of this article is to present the results of psychometric analyses to verify the structure of the CESD-R in a university student sample. An online cross-sectional study was conducted with 1519 university students (March/April 2021). The dataset was randomly divided into three subsets to perform principal component analysis (PCA, Subset 1) and CFA for CESD-R versions with different numbers of factors and items (Subsets 2 and 3). Measurement invariance for gender was verified for the whole sample. PCA pointed to a three-factor solution that was analyzed in the subsequent CFA. Due to high correlation coefficients between factors, further steps were taken using only one factor. For CFA, 20-, 18- and 9-item versions of the CESD-R were used, but the 9-item version obtained the best model fit parameters and was used to evaluate the measurement invariance for gender, which was confirmed. The 9-item CESD-R has the best model fit compared to other versions of this scale and is gender invariant. Further research is needed to verify the criterion validity of this shortened scale.

Association of depressive symptoms and quality of life in Pakistani youth (15-24 years) with polycystic ovarian syndrome: a web-based analytical cross-sectional study

Introduction

Polycystic ovarian syndrome (PCOS) is associated with impaired quality of life (QOL) of individuals, predominantly in youth, who are most vulnerable to its impact. Psychological morbidity could be one of the factors influencing QOL. The study investigated the association between depressive symptoms and QOL in Pakistani youth (15-24 years) with PCOS and determined other factors associated with QOL.

Methods

We conducted an analytical-cross-sectional survey on 213 single Pakistani females aged 15-24 years recruited via a web-based approach. Depression and QOL were assessed through Center-of-Epidemiological-Studies-Depression tool and Polycystic-ovarian-syndrome-quality-of-life-scale. Multiple-linear-regression was used to determine factors associated with QOL, and adjusted regression-coefficients along with a 95% confidence interval were reported.

Results

The mean QOL score: 2.9 ± 1.1. The domain of obesity had the lowest mean score (2.5 ± 1.6) whereas domain of hirsutism had the highest (3.2 ± 1.9). 172/213 (80%) participants were screened positive for depressive symptoms. Participants with depressive symptoms reported reduced mean QOL scores than respondents with no such symptoms (2.8 ± 1.0 vs. 3.4 ± 1.3, p < 0.001). No differences were found in overall QOL and individual domains between participants 15-19 years (n = 36, 17%) and participants >19-24 years (n = 177, 83%) (2.9 ± 1.1 vs. 2.9 ± 1.1) (p > 0.05). We found a significant interaction between depressive symptoms and PCOS duration, indicating that the estimated mean overall QOL score decreases by 25.1 (-36.6, -13.6) for every year increase in PCOS duration among participants screened positive for depressive symptoms. Furthermore, for those respondents who had family history of PCOS and were not satisfied with their healthcare provider treating PCOS, the estimated mean QOL score was 17.47 (-26.1, -8.8) lower than participants who had no family history of PCOS and were satisfied with their healthcare provider. Other factors associated with reduced quality of life included societal pressure to improve appearance affected by PCOS, parental criticism related to PCOS, education, socioeconomic status, working status and BMI.

Conclusion

Depressive symptoms with increasing duration of PCOS were significantly associated with reduced QOL. Therefore, to improve the overall QOL of PCOS youth, screening and timely addressing of psychological morbidities should be considered.

Plant-based dietary quality and depressive symptoms in Australian vegans and vegetarians: a cross-sectional study

Plant-based dietary patterns (vegan and vegetarian) are often considered 'healthy' and have been associated with broad health benefits, including decreased risk of obesity and ill health (cardiovascular disease, blood glucose and type II diabetes). However, the association between plant-based diets and mood disorders such as depression remains largely equivocal. This cross-sectional study of 219 adults aged 18-44 (M=31.22, SD=7.40) explored the associations between an estimate of overall plant-based diet quality and depression in vegans (n=165) and vegetarians (n=54). Overall plant-based diet quality was associated with depressive symptoms in vegans and vegetarians F(1, 215)=13.71, p<0.001 accounting for 6% of the variation in depressive symptoms. For those without depression, higher diet quality was protective against depressive symptoms F(1, 125)=6.49, p=0.012. Conversely, for those with depression no association with diet quality was found F(1, 89)=0.01, p=0.963. These findings suggest that a high-quality plant-based diet may be protective against depressive symptoms in vegans and vegetarians. In line with emerging research between food and mental health, higher-quality dietary patterns are associated with a reduced risk of depressive symptoms. Given the rapidly increasing rate of vegan and vegetarian food products within Australia, understanding the potential mechanisms of effects through which a plant-based diet may influence depressive symptoms is required.