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Table 1 Baseline characteristics of sample by treatment arm (n = 1689)

From: The effectiveness of an online intervention in preventing excessive gestational weight gain: the e-moms roc randomized controlled trial

Characteristica Placebo control n = 563 Intervention n = 1126
BMI Income Strata n (%) n (%)
 Normal Low Income 115 (20.4) 242 (21.5)
 Normal Not-Low Income 186 (33.0) 359 (31.9)
 Overweight + Obese Low Income 125 (22.2) 252 (22.4)
 Overweight + Obese Not-Low Income 137 (24.3) 273 (24.3)
Initial BMI (kg/m2)   
 Median (25th, 75th percentile) 24.7 (21.9, 28.3) 24.7 (22.0, 28.6)
Age at entry   
 18 to 24.99 y 167 (29.7) 358 (31.8)
 25 to 29.99 y 205 (36.4) 366 (32.5)
 30 to 34.99 y 191 (33.9) 402 (35.7)
Race and ethnicity   
 Non-Hispanic white 340 (64.8) 667 (63.8)
 Non-Hispanic African American 111 (21.1) 246 (23.5)
 Hispanic/Latina 27 (5.1) 73 (7.0)
 Other 47 (9.0) 60 (5.7)
 Missing (n) 38 80
Parity   
 Nulliparous 264 (47.1) 511(45.4)
 Primiparous 172 (30.7) 378 (33.6)
 Multiparous 125 (22.3) 236 (21.0)
 Missing (n) 2 1
Education   
 High school or less 91 (20.2) 200 (22.5)
 Some college 133 (29.6) 258 (29.0)
 College graduate 113 (25.1) 213 (23.9)
 Graduate or professional degree 113 (25.1) 219 (24.6)
 Missing (n) 113 236
Smoked in pregnancy   
 Yes 66 (12.6) 114 (11.0)
 No 457 (87.4) 923 (89.0)
 Missing (n) 40 89
Home internet use   
 Most days/week 335 (71.7) 665 (72.0)
 A few times or less 132 (28.3) 259 (28.0)
 Missing (n) 96 202
  1. aTable entries are shown as frequency and percent of known values, n (%), unless specified differently. Subjects with missing values are shown in the missing row for each characteristic