Nandita Perumal

Sep 21, 2023 | bmj.com | Nandita Perumal |Dongqing Wang |Anne Darling |Enju Liu

Maternal GWG was defined as the difference between the final weight measure before delivery and the first trimester weight. Gestational age was assessed using ultrasound based measures or date of last menstrual period.

Jul 24, 2023 | journals.plos.org | Anne Darling |Dongqing Wang |George Mason |Nandita Perumal

Statistical analysesWe conducted 2-stage pooled analyses for risk factors of interest that were measured in at least 3 studies. In a few cases, we excluded studies if the risk factor had an extremely high number of missing values. These analyses involved first estimating study-specific regression coefficients using modified Poisson regression with robust variance estimates and pooling all regression coefficients in a meta-analysis.

Jul 24, 2023 | journals.plos.org | Anne Darling |Dongqing Wang |George Mason |Nandita Perumal

Statistical analysesWe conducted 2-stage pooled analyses for risk factors of interest that were measured in at least 3 studies. In a few cases, we excluded studies if the risk factor had an extremely high number of missing values. These analyses involved first estimating study-specific regression coefficients using modified Poisson regression with robust variance estimates and pooling all regression coefficients in a meta-analysis.