Abstrak: Systematic investigations into the structure of measurement error of physical activity questionnaires are lacking. We propose a measurement error model for a physical activity questionnaire that uses physical activity level (the ratio of total energy expenditure to basal energy expenditure) to relate questionnaire-based reports of physical activity level to true physical activity levels. The 1999-2006 National Health and Nutrition Examination Survey physical activity questionnaire was administered to 433 participants aged 40-69 years in the Observing Protein and Energy Nutrition (OPEN) Study (Maryland, 1999-2000). Valid estimates of participants' total energy expenditure were also available from doubly labeled water, and basal energy expenditure was estimated from an equation; the ratio of those measures estimated true physical activity level ("truth"). We present a measurement error model that accommodates the mixture of errors that arise from assuming a classical measurement error model for doubly labeled water and a Berkson error model for the equation used to estimate basal energy expenditure. The method was then applied to the OPEN Study. Correlations between the questionnaire-based physical activity level and truth were modest (r = 0.32-0.41); attenuation factors (0.43-0.73) indicate that the use of questionnaire-based physical activity level would lead to attenuated estimates of effect size. Results suggest that sample sizes for estimating relationships between physical activity level and disease should be inflated, and that regression calibration can be used to provide measurement error-adjusted estimates of relationships between physical activity and disease.

Abstrak: Venue sampling is a common sampling method for populations of men who have sex with men (MSM); however, men who visit venues frequently are more likely to be recruited. While statistical adjustment methods are recommended, these have received scant attention in the literature. We developed a novel approach to adjust for frequency of venue attendance (FVA) and assess the impact of associated bias in the ManCount Study, a venue-based survey of MSM conducted in Vancouver, British Columbia, Canada, in 2008-2009 to measure the prevalence of human immunodeficiency virus and other infections and associated behaviors. Sampling weights were determined from an abbreviated list of questions on venue attendance and were used to adjust estimates of prevalence for health and behavioral indicators using a Bayesian, model-based approach. We found little effect of FVA adjustment on biological or sexual behavior indicators (primary outcomes); however, adjustment for FVA did result in differences in the prevalence of demographic indicators, testing behaviors, and a small number of additional variables. While these findings are reassuring and lend credence to unadjusted prevalence estimates from this venue-based survey, adjustment for FVA did shed important insights on MSM subpopulations that were not well represented in the sample.

Abstrak: Komplikasi persalinan merupakan penyebab langsung kematian ibu. Berat badan lahir rendah (BBLR) terus menjadi masalah kesehatan masyarakat global. Kunjungan antenatal menjadi faktor penting terjadinya komplikasi persalinan dan BBLR. Penelitian kunjungan antenatal, komplikasi persalinan, dan BBLR banyak dilakukan dengan beragam metode statistik. Tujuan penelitian menghasilkan evidence based recommendation kepada pemegang program berdasarkan perbandingan hasil analisis tiga alternatif pilihan metode statistik tentang pengaruh kunjungan antenatal terhadap komplikasi persalinan dan BBLR. Penelitian ini merupakan penelitian kuantitatif dengan desain studi cross-sectional. Sumber data berasal dari Survei Demografi Kesehatan Indonesia (SDKI) 2017. Sampel penelitian sebagian wanita usia subur berusia 15-49 tahun yang melahirkan anak terakhir dalam 5 tahun terakhir sebanyak 12.035 responden. Variabel dependen: komplikasi persalinan dan BBLR, variabel independen: kunjungan antenatal, variabel potensial confounder: status ekonomi, tempat tinggal, pendidikan, status pernikahan, status merokok, jarak kelahiran, kunjungan antenatal pertama, kunjungan antenatal terakhir, petugas pemeriksa antenatal, tempat antenatal, paritas, usia ibu, dan jenis kelamin bayi. Analisis data menggunakan regresi logistik, cox, dan poisson dengan varians robust. Hasil penelitian menunjukkan bahwa prevalensi komplikasi persalinan (47,40%) dan BBLR (6,56%). Kunjungan antenatal terbukti secara statistik berpengaruh terhadap komplikasi persalinan dan BBLR di Indonesia. Wanita yang melakukan kunjungan antenatal

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Childbirth complications are a direct cause of maternal death. Low birth weight (LBW) continues to be a global public health problem. The antenatal care visits is an important factor in occurrence of birth complications and LBW. Research on the frequency of antenatal visits, birth complications, and LBW has been carried out using various statistical methods. The purpose of the study is to produce evidence-based recommendations for the program based on a comparison of the results of the analysis of three alternative statistical methods for Indonesia regarding the influence of the of antenatal visits on birth complications and LBW. This study is a quantitative study with a cross-sectional study design. The data comes from the 2017 Indonesian Demographic Health Survey (IDHS). The sample of this study included 12,035 respondents of women of childbearing aged 15-49 years who gave birth to their last child in the last 5 years. Dependent variables: birth complications and LBW, independent variables: frequency of antenatal care, potential confounder variables: economic status, geographic area, place of residence, education, marital status, smoking status, birth spacing, first antenatal visit, last antenatal visit, antenatal care provider, place an antenatal care, birth order, parity, maternal age, and baby’s sex. Data analysis uses logistic regression, Cox, and Poisson regression with robust variance. The results showed that the prevalence of birth complications (47.40%) and LBW (6.56%). The antenatal care visits had been statistically proven to influence childbirth complications and LBW in Indonesia. Women who had

Abstrak: Introduction: . Women suffer disproportionately from depression, which has a high prevalence in developing countries. Sociodemographic factors are associated with depression, some of which may be modifiable and lead to better outcomes for depression among women.

Objectives: . To determine sociodemographic factors associated with depression among women of reproductive age in Karachi.

Methods: . A case control study was conducted on 376 women in 2 hospitals in Karachi. Patients were diagnosed by psychiatrists and family physicians by Diagnostic and Statistical Manual of Mental Disorders (4th ed.) criteria and SRQ20.

Results: . The odds for women with depression being married for >5 years, being abused by in-laws, spending ≤3 hours per day with their spouses, and being just satisfied or not satisfied with their married life was more than that for controls.

Conclusion: . The authors' findings highlight the important modifiable risk factors for depression, which if addressed will help decrease the burden of depression among women.