832 Does BMI influence the impact of an educational video module on gestational weight gain?

Abstract

Approximately 70% of patients do not gain appropriate weight during pregnancy, and almost one third of women receive no counseling about gestational weight gain (GWG). Overweight and obese patients have the highest prevalence of excessive GWG. We aim to see if use of a video module will impact GWG differently among different BMI categories. This was an IRB-approved, prospective cohort study conducted from February-October 2019. Patients were recruited from a large academic practice during their first trimester of pregnancy. Group 1 were patients in the control cohort and received routine care, while, group 2 were in the intervention cohort and watched the 5-minute GWG video module. Patients were included if they were ≥18 years old and had a singleton intrauterine pregnancy. Patients were excluded if they were non-English speaking, had a fetus with a known anomaly and/or demise, or if they had a documented eating disorder. Pre-pregnancy weight was recorded for all. On admission to the hospital for delivery, all patients’ GWG was calculated. Patients were stratified by their pre-pregnancy BMI, and the percentage of patients who gained the appropriate amount of weight was calculated for each BMI class, in each group. T-tests and Mann-Whitney U tests were used to compare groups, with a value of p<0.05 statistically significant. 155 patients were recruited, with 79 in group 1 and 76 in group 2 (Table 1). 3 and 7 patients were lost from groups 1 and 2, respectively, due to transfer of care or pregnancy loss. The first group (n=76) showed a difference in the percentage of patients who had the appropriate GWG, with overweight patients being significantly less likely to gain appropriately as compared to the other BMI groups (p=0.007). In the second group (n=69), there was no significant difference in the percentage of patients with the appropriate GWG based on BMI. In overweight women only, 8.30% of patients in group 1 gained appropriately, as compared to 30.40% of patients in group 2 (p=0.216), Table 2. A video module can potentially improve GWG among overweight patients.View Large Image Figure ViewerDownload Hi-res image Download (PPT)