Table 1 Baseline characteristics of participants
Variable | Intention-to-treat population | Per-protocol population | ||
|---|---|---|---|---|
Intervention Mean (SD) Median (range) (n = 438) | Controls Mean (SD) Median (range) (n = 871) | Intervention Mean (SD) Median (range) (n = 116) | Control Mean (SD) Median (range) (n = 845) | |
Weeks pregnant at first pregnancy visit | 8.6 (2.5) 8.2 (3–20) | 7.9 (2.3) 7.9 (5–18) | 8.3 (2.1) 7.9 (4–15) | 7.9 (2.3) 7.7 (5–18) |
Age, years | 30.9 (5.5) 30.5 (18.2–47.4) | 30.7 (5.1) 30.4 (17.6–46.1) | 30.7 (5.4)30.1 (20.7–47.4) | 30.7 (5.1) 30.3 (17.6–46.1) |
Weight at first pregnancy visit, transformed to week 15, kg | 94.0 (13.9) 92.0 (63.0–152.0) | 93.4 (11.5) 92.0 (69.0–153.0) | 94.1 (14.7) 91.0 (67.0–152.0) | 93.3 (11.3) 92.0 (69.0–144.0) |
Height at first pregnancy visit, cm | 165.8 (7.5) 165.0 (133.0–187.0) n = 437 | 166.4 (6.2) 166.0 (148.0–185.0) | 165.8 (7.2) 165.0 (148.0–180.0) | 166.4 (6.2) 166.0 (148.0–185.0) |
BMI at first pregnancy visit, transformed to week 15 | 34.1 (4.0) 33.3 (27.7–57.2) n = 437 | 33.7 (3.2) 32.8 (29.7–50.0) | 34.1 (3.7) 33.1 (29.3–49.6) | 33.6 (3.1) 32.8 (29.7–47.0) |
n (%) | n (%) | n (%) | n (%) | |
Overweight BMI < 30.0a | 28 (6.4) | 5 (0.6) | 6 (5.2) | 5 (0.6) |
Obese Class I BMI 30.0–34.9 | 271 (62.0) | 611 (70.1) | 74 (63.8) | 596 (70.5) |
Obese Class II BMI 35.0–39.9 | 98 (22.4) | 210 (24.1) | 25 (21.6) | 204 (24.1) |
Obese Class III BMI ≥40 | 40 (9.2) | 45 (5.2) | 11 (9.5) | 40 (4.7) |
Primipara | 204 (46.6) | 338 (38.8) | 63 (54.3) | 326 (38.6) |
Born outside Sweden | 131 (29.9) | 92 (10.6) | 35 (30.2) | 89 (10.5) |
Use of translator | 46 (10.5) | 17 (2.0) | 14 (12.1) | 17 (2.0) |
Education ≤12 yearsb | 269 (61.6) | 564 (64.8) | 68 (58.6) | 545 (64.6) |
Other than employedc | 151 (34.5) | 194 (22.3) | 43 (37.1) | 187 (22.2) |
Use of nicotine | 33 (7.5) | 79 (11.0) | 8 (6.9) | 77 (11.1) |