Table 2 Description of risk factors related to birth weight and FGR status (n = 3159)
Birth weight (g) | FGR (n = 172) | ||
|---|---|---|---|
Mean (95% CI) | N | OR (95% CI) | |
All (std) | 3392 (492.4) | ||
Child's sex | |||
Male | 3452 (3428-3476)** | 87 | Ref |
Female | 3330 (3305-3355) | 85 | 1.0 (0.7-1.4) |
Missing | 0 | ||
Level of urbanization | |||
Urban | 3393 (3355-3532) | 28 | Ref |
Rural | 3392 (3372-3411) | 144 | 1.4 (0.9-2.1) |
Districts of inclusion | |||
Ille-et-Vilaine | 3386 (3365-3408) | 111 | Ref |
Côtes d'Armor - Finistère | 3403 (3374-3433) | 61 | 1.1 (0.8-1.5) |
Year of inclusion | |||
2002 | 3381 (3331-3431) | 23 | 1.1 (0.7-1.8) |
2003 | 3381 (3353-3410) | 64 | Ref |
2004 | 3390 (3361-3420) | 56 | 0.9 (0.6-1.4) |
2005 - beginning 2006 | 3436 (3390-3482) | 29 | 1.2 (0.8-1.9) |
Season in early pregnancy | |||
Spring | 3406 (3371-3442) | 34 | Ref |
Summer | 3389 (3356-3422) | 48 | 1.2 (0.8-1.9) |
Fall | 3380 (3343-3416) | 42 | 1.3 (0.8-2.1) |
Winter | 3393 (3358-3429) | 48 | 1.4 (0.9-2.2) |
Maternal age at inclusion (years) | |||
< 25 | 3326 (3273-3379)** | 21 | 1.4 (0.8-2.3) |
25-29 | 3389 (3361-3416) | 56 | Ref |
30-34 | 3403 (3374-3433) | 70 | 1.4 (1.0-2.1) |
≥ 35 | 3425 (3379-3472) | 25 | 1.3 (0.8-2.1) |
BMI before pregnancy (kg/m 2 ) | |||
< 18.5 | 3226 (3162-3290)** | 12 | 0.9 (0.5-1.7) |
18.5-25 | 3389 (3368-3409) | 128 | Ref |
25-30 | 3468 (3419-3516) | 19 | 0.9 (0.5-1.4) |
≥ 30 | 3500 (3423-3578) | 13 | 1.5 (0.8-2.8) |
Missing | 0 | ||
Maternal educational level | |||
Primary education | 3339 (3298-3380)** | 45 | 1.7 (1.1-2.4) |
Some secondary education | 3405 (3364-3446) | 27 | 0.9 (0.6-1.4) |
High school completed or higher | 3404 (3382-3426) | 100 | Ref |
Missing | 0 | ||
Maternal tobacco status in early pregnancy | |||
Non smoker | 3403 (3382-3424)** | 114 | Ref |
Former smoker | 3446 (3400-3493) | 18 | 0.8 (0.5-1.3) |
Smoker | 3284 (3237-3331) | 40 | 1.9 (1.3-2.8) |
Missing | 0 | ||
Maternal alcohol consumption in early pregnancy | |||
Never/occasionally | 3389 (3370-3408) | 146 | Ref |
≤ 1 drink/day | 3420 (3372-3469) | 18 | 0.8 (0.5-1.3) |
> 1 drink/day | 3340 (3208-3471) | 5 | 1.7(0.7-4.3) |
Missing | 3 | ||
Parity | |||
0 | 3313 (3287-3339)** | 79 | Ref |
1 | 3435 (3407-3464) | 70 | 1.1 (0.8-1.5) |
≥ 2 | 3503 (3463-3544) | 23 | 0.7 (0.4-1.1) |
Missing | 0 | ||
Marital status | |||
Couple | 3393 (3375-3411) | 163 | Ref |
Single | 3332 (3219-3446) | 9 | 2.6 (1.3-5.3) |
Missing | 0 | ||
Gestational or preexisting diabetes | |||
No | 3392 (3374-3410) | 161 | Ref |
Yes | 3409 (3317-3500) | 7 | 1.1 (0.5-2.5) |
Missing | 4 | ||
High blood pressure during pregnancy | |||
No | 3411 (3393-3429)** | 143 | Ref |
Yes | 3102 (3029-3176) | 25 | 3.3 (2.1-5.3) |
Missing | 4 | ||
Cesarean delivery | |||
No | 3406 (3387-3425)** | 131 | Ref |
Yes | 3325 (3282-3367) | 40 | 1.5 (1.0-2.2) |
Missing | 1 | ||