Use of a DVD to provide dietary and lifestyle information to pregnant women who are overweight or obese: a nested randomised trial

Abstract

BackgroundWe conducted a nested randomised trial to evaluate the effect of an educational DVD, providing information about healthy food choices and exercise during pregnancy, on diet and physical activity, among pregnant women who were overweight or obese.MethodsWe conducted a nested randomised trial within the context of the LIMIT randomised trial. Women were eligible with a singleton pregnancy between 10 and 20 weeks gestation, and body mass index at the time of their first antenatal appointment of ≥25 kg/m2. All women who were randomised to the Lifestyle Advice Group of the LIMIT trial received a series of consultations with both research dieticians and research assistants, in addition to standard written dietary and exercise materials (Standard Materials Group). Women randomised to the DVD Group received the same consultations and written materials, and additionally received an educational DVD (DVD Group). The primary study outcome was the Healthy Eating Index. Other study outcomes included physical activity, and gestational weight gain. Women completed a qualitative evaluation of all the materials provided.Results1,108 women in the LIMIT Lifestyle Advice Group participated in the nested trial, with 543 women randomised to the DVD Group, and 565 women to the Standard Materials Group. Women who received the DVD compared with those who did not, had a higher mean Healthy Eating Index at 36 weeks gestation (73.6 vs 72.3; adjusted mean difference 1.2; 95% CI 0.2 to 2.3; p = 0.02), but not at 28 weeks gestation (73.2 vs 73.5; adjusted mean difference −0.1; 95% CI −1.1 to 0.9; p = 0.82). There were no statistically significant differences in physical activity or total gestational weight gain. While most women evaluated the materials positively, frequency of utilisation was poor.ConclusionsOngoing attention to the delivery of information is required, particularly with the increased use and availability of digital and multi-media interactive technologies.Trial registrationAustralian and New Zealand Clinical Trials Registry ACTRN12607000161426

Intervention strategies for preventing excessive gestational weight gain: systematic review and meta‐analysis

“…In all RCTs, participants were enrolled by 28 weeks of gestation. Gestational weight gain was the primary outcome for 13 RCTs but a secondary outcome for 10 RCTs . Five RCTs were focused on healthy eating , six on physical activity and 12 on combined healthy eating and physical activity .…”

“…Gestational weight gain was the primary outcome for 13 RCTs but a secondary outcome for 10 RCTs . Five RCTs were focused on healthy eating , six on physical activity and 12 on combined healthy eating and physical activity . Eleven RCTs had a sample size less than 100 , seven had a sample size of 100–400 and three included more than 1,000 subjects .…”

“…Twenty RCTs presented no other bias relevant to group differences in baseline. Overall, 19 RCTs were rated as having moderate risk for reporting bias, two were rated as low risk and two were rated as high risk .…”

“…Other RCTs included general recommendations for macronutrients, such as balancing protein, fat and carbohydrate , replacing carbohydrate rich foods with lower glycemic index foods , reducing fat and increasing fruits/vegetables , or eating protein, and reducing fat and carbohydrate .…”

“… and Szmeja et al . recommended two servings of fruits, five servings of vegetables and three servings of dairy/day. Others included meal plans , healthy recipes , high‐fibre intake , eating three meals and three snacks a day with the last snack 2 hours after dinner , portion control , eating‐out options and checking nutrition facts and food labels .…”