Table 1 Characteristics of French Pregnant Women at the Time of Urine Sampling, and of their Offspring (Eden and Pélagie Cohorts, 2002 – 2006)
Eden-Poitiers (n = 91) | Eden-Nancy (n = 100) | Pélagie-Brittany (n = 96) | Overall (n = 287) | |||||
|---|---|---|---|---|---|---|---|---|
Characteristics of participants | N (%) | 5th-50th-95th centiles | N (%) | 5th -50th-95th centiles | N (%) | 5th -50th-95th centiles | N (%) | 5th -50th-95th centiles |
Duration of gestationa | 37-40-42 | 37-39-42 | 36-39-41 | 36-40-42 | ||||
Age (years) | 21.9-29.0-38.4 | 20.9-28.9-38.7 | 23.5-29.6-37.0 | 22.2-29.3-37.8 | ||||
BMI b (kg/m² ) | 18.4-22.6-33.6 | 17.1-21.5-31.3 | 16.8-21.2-24.2 | 17.7-21.7-32.2 | ||||
Previous livebirth | ||||||||
0 | 38 (42%) | 34 (34%) | 43 (45%) | 115 (40%) | ||||
≥ 1 | 31 (34%) | 44 (44%) | 39 (41%) | 114 (40%) | ||||
≥ 2 | 22 (24%) | 22 (22%) | 14 (14%) | 58 (20%) | ||||
Active smoking ( > 0 cig./day)c | ||||||||
No | 74 (82%) | 84 (84%) | 80 (85%) | 238 (83%) | ||||
Yes | 17 (18%) | 16 (16%) | 14 (15%) | 47 (17%) | ||||
Alcohol ( > 0 glasses/day)c | ||||||||
No | 57 (70%) | 71 (82%) | 79 (82%) | 207(78%) | ||||
Yes | 24 (30%) | 16 (18%) | 17 (18%) | 57 (22%) | ||||
Maternal education | ||||||||
High school or less | 51 (58%) | 44 (45%) | 38 (40%) | 133 (48%) | ||||
High school + 2 years or more | 37 (42%) | 53 (55%) | 58 (60%) | 148 (52%) | ||||
Occupation b | ||||||||
No | 31 (34%) | 27 (27%) | 12 (12%) | 70 (25%) | ||||
Yes | 59 (66%) | 72 (73%) | 84 (88%) | 215 (75%) | ||||
Date of urine sampling | Jul. 03- Nov. 04d- Aug. 05 | Dec.03- Sept.04d- Jan.06 | Aug. 02- Nov. 03d- Mar. 05 | Mar. 03- Jun. 04d- Nov. 05 | ||||
Urine Sampling conditions | ||||||||
Time of sampling | ||||||||
Before 7.00 AM | 12 (18%) | 23 (23%) | - | 35 (21%) | ||||
7.00 to 7.59 AM | 29 (44%) | 44 (44%) | - | 73 (44%) | ||||
8.00 to 9.59 AM | 13 (20%) | 27 (27%) | - | 40 (24%) | ||||
After 10.00 AM | 12 (18%) | 6 (6%) | - | 18 (11%) | ||||
Creatinine (g/l) | 0.46-1.04-2 | 0.38-1.16-2.30 | 0.47-1.10-2.1 | 0.43-1.10-2.20 | ||||
Gestational weeks at sampling | 25-27-28.6 | 24.1-26.4-28.5 | 7.4-13-16.9 | 9.1-25.6-28.3 | ||||
Duration of storage at room temperature (h) | 0.7-3-6 | 3-5-8 | 24-48-168 | 1-5-120 | ||||
Season of sampling | ||||||||
Jan-March | 27 (30%) | 32 (32%) | 24 (25%) | 83 (29%) | ||||
April-June | 22 (24%) | 27 (27%) | 31 (32%) | 80 (28%) | ||||
July-Sept | 21 (23%) | 17 (17%) | 21 (22%) | 59 (20%) | ||||
Oct-Dec | 21 (23%) | 24 (24%) | 20 (21%) | 65 (23%) | ||||
Day of sampling | ||||||||
Monday to Friday | 91 (100%) | 100(100%) | 82 (85%) | 273(95%) | ||||
Saturday or Sunday | 0 (0%) | 0 (0%) | 14 (15%) | 14 (5%) | ||||