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Table 1 Characteristics of the identified randomised trials

From: The effects of dietary and lifestyle interventions among pregnant women who are overweight or obese on longer-term maternal and early childhood outcomes: protocol for an individual participant data (IPD) meta-analysis

Trial name LIMIT [5557] UPBEAT [58] ROLO [59] LiP [6063] Belgian Flanders [64] NELLI [65] The TOP study [66]
Investigators Dodd, Grivell, Owens Poston McAuliffe Vinter, Tanvig, Jensen Bogaerts, Devlieger Luoto Renault
Funding NHMRC (ID 519240 and 1043178) NIHR HRB Ireland Trygfonden, Denmark   Finnish Diabetes Research Fund Sygekassernes Helsefond; Broedrene Hartmann Fondon
Inclusion criteria Overweight or obese Obese Women with prior birth of infant >4 kg Obese Obese Women of all BMI categories Obese
Setting Adelaide, South Australia Multiple centres, United Kingdom Dublin, Ireland Odense, Denmark Multiple centres, Belgium Pirkananaa region, Southwest Finland Copenhagen, Denmark
Intervention intensity 3 face-to-face sessions (2 with dietitian, 1 with RA); 3 telephone contacts 8 weekly sessions with health trainer Initial group dietary education session, 2 follow-up sessions with dietitian 4 sessions with dietitian; weekly physiotherapy sessions 4 sessions with midwife 5 counselling sessions with midwife Up to 13 sessions (alternate face-to-face and telephone with dietitian)
Intervention content Healthy eating in pregnancy; food substitutions; promote increased physical activity; identify barriers/enablers Healthy eating; food substitutions; promote increased physical activity; SMART goals Healthy eating in pregnancy; low glycaemic index foods Dietary advice consistent with national guidelines; individual energy requirements calculated; moderate physical activity Dietary advice consistent with national guidelines Promote increased physical activity; dietary advice consistent with national guidelines Mediterranean style diet consistent with national recommendations; increased physical activity measured by pedometer
Baseline data 10–20 weeks gestation 15–19 weeks gestation Prior to 18 weeks gestation 10–14 weeks gestation Prior to 15 weeks gestation 8–12 weeks gestation Prior to 16 weeks gestation
Primary trial findings Reduction infant birth weight >4 kg
Improved diet and physical activity
Reduction GWG 0.5 kg
Improved diet and physical activity
Reduction GWG 1.3 kg
Improved diet, physical activity and insulin resistance
Reduction GWG 1.6 kg
Improved insulin resistance
Reduction GWG 1.1 kg Reduction infant birth weight >4 kg
Improved diet and physical activity
Reduction GWG 1.38 kg
Sample size 2212 women randomised 1556 women randomised 429 women randomised 360 women randomised 205 women randomised 238 women randomised 425 women randomised
Follow-up 6, 18, and 36 months 6 and 36 months 6 and 60 months 6 and 36 months 36 months 36 months 6, 9, 18, and 36 months
Retention 72% (~1592) 60% (~930) 68% (~290) 54% (~194) 65% (~134) 65% (~154) 65% (~250)