Table 3 Description of risk factors related to head circumference at birth and SHC status (n = 3159)
Head circumference (cm) | SHC (n = 102) | ||
|---|---|---|---|
Mean (95% CI) | N | OR (95% CI) | |
All (std) | 34.6 (1.5) | ||
Child's sex | |||
Male | 34.9 (34.8-35.0)** | 55 | Ref |
Female | 34.4 (34.2-34.4) | 47 | 0.9 (0.6-1.3) |
Missing | 0 | ||
Level of urbanization | |||
Urban | 34.6 (34.6-34.7) | 16 | Ref |
Rural | 34.7 (34.6-34.8) | 86 | 1.4 (0.8-2.4) |
Districts of inclusion | |||
Ille-et-Vilaine | 34.6 (34.6-34.7) | 69 | Ref |
Côtes d'Armor - Finistère | 34.6 (34.6-34.7) | 33 | 0.9 (0.6-1.4) |
Year of inclusion | |||
2002 | 34.7 (34.5-34.8) | 16 | 1.4 (0.7-2.5) |
2003 | 34.6 (34.5-34.7) | 37 | Ref |
2004 | 34.6 (34.5-34.7) | 36 | 1.0 (0.6-1.6) |
2005 - beginning 2006 | 34.6 (34.5-34.8) | 13 | 0.9 (0.5-1.7) |
Season in early pregnancy | |||
Spring | 34.7 (34.5-34.8) | 23 | Ref |
Summer | 34.6 (34.5-34.7) | 30 | 1.1 (0.6-2.0) |
Fall | 34.6 (34.5-34.7) | 22 | 1.0 (0.5-1.8) |
Winter | 34.7 (34.6-34.8) | 27 | 1.2 (0.7-2.1) |
Maternal age at inclusion (years) | |||
< 25 | 34.5 (34.3-34.6)* | 13 | 1.3 (0.7-2.4) |
25-29 | 34.7 (34.6-34.7) | 38 | Ref |
30-34 | 34.6 (34.5-34.7) | 46 | 1.4 (0.9-2.1) |
≥ 35 | 34.7 (34.6-34.9) | 5 | 0.4 (0.1-0.9) |
BMI before pregnancy (kg/m 2 ) | |||
< 18.5 | 34.2 (34.0-34.4)** | 14 | 1.9 (1.1-3.5) |
18.5-25 | 34.6 (34.5-34.7) | 76 | Ref |
25-30 | 34.8 (34.7-35.0) | 9 | 0.7 (0.3-1.4) |
≥ 30 | 35.1 (34.9-35.3) | 3 | 0.6 (0.2-1.8) |
Missing | 0 | ||
Maternal educational level | |||
Primary education | 34.5 (34.4-34.6) | 15 | 1.0 (0.6-1.7) |
Some secondary education | 34.7 (34.5-34.8) | 20 | 0.8 (0.4-1.3) |
High school completed or higher | 34.6 (34.6-34.7) | 67 | Ref |
Missing | 0 | ||
Maternal tobacco status in early pregnancy | |||
Non smoker | 34.7 (34.6-34.7)** | 66 | Ref |
Former smoker | 34.7 (34.6-34.9) | 14 | 1.1 (0.6-1.9) |
Smoker | 34.4 (34.2-34.5) | 22 | 1.7 (1.1-2.9) |
Missing | 0 | ||
Maternal alcohol consumption in early pregnancy | |||
Never/occasionally | 34.6 (34.6-34.7) | 91 | Ref |
≤ 1 drink/day | 34.7 (34.6-34.9) | 7 | 0.5 (0.2-1.1) |
> 1 drink/day | 34.8 (34.4-35.2) | 3 | 1.6 (0.5-5.3) |
Missing | 1 | ||
Parity | |||
0 | 34.5 (34.4-34.6)** | 55 | Ref |
1 | 34.7 (34.6-34.8) | 39 | 0.8 (0.5-1.3) |
≥ 2 | 34.8 (34.7-34.9) | 8 | 0.3 (0.2-0.74) |
Missing | 0 | ||
Marital status | |||
Couple | 34.6 (34.6-34.7) | 100 | Ref |
Single | 34.8 (34.4-35.1) | 2 | - a |
Missing | 0 | ||
Gestational or preexisting diabetes | |||
No | 34.6 (34.6-34.7) | 97 | Ref |
Yes | 34.6 (34.3-34.9) | 3 | 0.8 (0.2-2.5) |
Missing | 2 | ||
High blood pressure during pregnancy | |||
No | 34.7 (34.6-34.7)** | 95 | Ref |
Yes | 34.1 (33.8-34.3) | 6 | 1.1 (0.5-2.5) |
Missing | 1 | ||
Cesarean delivery | |||
No | 34.6 (34.5-34.7)** | 88 | Ref |
Yes | 34.8 (34.7-34.9) | 11 | 0.6 (0.3-1.1) |
Missing | 3 | ||