Table 2.
Baseline characteristics of all women, stratified by compliance, defined as whether they completed the questionnaire at 24 weeks or resigned before this time point.
| Characteristics | Completed n=177 | Resigned n=41 | P value | |
| Age in years, median (IQRa) | 30.8 (6.0) | 30.1 (6.0) | .33 | |
| Height (cm), median (IQR) | 170 (10.0) | 169 (8.0) | .86 | |
| BMIb (kg/m2), median (IQR) | 23.4 (5.8) | 25.6 (4.5) | .13 | |
| Pregnant at enrollment, n (%) | 63 (33.9) | 10 (31.3) | .77 | |
| Partner participation, n (%) | 31 (16.7) | 6 (18.8) | .77 | |
| Geographic origin, n (%) |
|
|
.21 | |
|
|
Dutch | 145 (78.0) | 24 (75.0) |
|
|
|
Western | 7 (3.8) | 0 (0) |
|
|
|
Nonwestern | 27 (14.5) | 3 (9.4) |
|
|
|
Missing | 7 (4.0) | 5 (12.2) |
|
| Education, n (%) |
|
|
.01 | |
|
|
High | 119 (64.0) | 19 (59.4) |
|
|
|
Intermediate | 53 (28.5) | 7 (21.9) |
|
|
|
Low | 3 (1.6) | 1 (3.1) |
|
|
|
Missing | 11 (6.2) | 5 (12.2) |
|
| Vegetables, grams per day, n (%) |
|
|
.13 | |
|
|
<150 (DRSc 3) | 106 (57.0) | 24 (75.0) |
|
|
|
150-200 (DRS 1.5) | 38 (20.4) | 5 (15.6) |
|
|
|
≥200 (DRS 0) | 42 (22.6) | 3 (9.4) |
|
| Fruit, pieces per day, n (%) |
|
|
.06 | |
|
|
<1.5 (DRS 3) | 59 (31.7) | 17 (53.1) |
|
|
|
1.5-2.0 (DRS 1.5) | 19 (10.2) | 3 (9.4) |
|
|
|
≥2.0 (DRS 0) | 108 (58.0) | 12 (37.5) |
|
| Folic acid supplement use, n (%) |
|
|
.48 | |
|
|
Inadequate (DRS 3) | 16 (8.6) | 4 (12.5) |
|
|
|
Adequate (DRS 0) | 170 (91.4) | 28 (87.5) |
|
| DRS, median (IQR) (DRS 0-9) | 3 (4.5) | 4.5 (3.0) | .007 | |
| Alcohol consumption, n (%) | 40 (21.5) | 11 (34.4) | .14 | |
| Smoking, n (%) | 13 (7.0) | 4 (12.5) | .28 | |
aIQR: interquartile range.
bBMI: body mass index.
cDRS: dietary risk score.