Skip to main content

Table 2 Comparisons of gestational age and preterm birth between control and exercise groups, PAMELA study

From: A randomized controlled trial of exercise during pregnancy on maternal and neonatal outcomes: results from the PAMELA study

Intention-to-treat analysis Intervention (n=198a) Control (n=396a) p  
  n (%) 0.73 OR (95%CI)
Preterm birth
 < 37 weeks 26 (13.1) 48 (12.1)   1.1 (0.7-1.8)
 ≥ 37 weeks 172 (86.9) 348 (87.9)  
  mean (SD)   MD (95%CI)
Gestational age at delivery (weeks) 38.5 ± 2.1 38.7 ± 1.8 0.17 0.2 (−0.1-0.6)
 Per protocol analysis (> = 70% exercise sessions) n = 83 n = 396   
  n (%) 0.52 OR (95%CI)
Preterm birth
 < 37 weeks 8 (9.6) 48 (12.1)   0.8 (0.4-1.7)
 ≥ 37 weeks 75 (90.4) 348 (87.9)  
  mean (SD)   MD (95%CI)
Gestational age at delivery (weeks) 38.8 ± 2.0 38.7 ± 1.8 0.63 −0.1 (−0.5; 0.3)
 Sensitivity analysis (per protocol 100%) b n = 23 n = 396   
  n (%)   OR (95%CI)
Preterm birth    0.62  
 < 37 weeks 2 (8.7) 48 (12.1)   0.7 (0.2;3.0)
 ≥ 37 weeks 21 (9.3) 348 (87.9)  
  mean (SD)   MD (95%CI)
Gestational age at delivery (weeks) 38.8 ± 2.5 38.7 ± 1.8 0.87 −0.1 (−0.8;0.7)
  1. aDescription of these numbers was presented in the flowchart of the intervention. bAt least 48 sessions of the total exercise program. SD: standard deviation. OR: odds ratio. CI: confidence interval. p > .05; MD: mean difference