Table 1.
Percentages and relative risks of pregnancy outcomes according to neighbourhood classification
| Total | Deprived neighbourhood | RR (95% CI) | ||
|---|---|---|---|---|
| Yes | No | |||
| N = 7,359 | n = 2,779 | n = 4,580 | ||
| Location of delivery | ||||
| Hospital | 82.3 | 85.6 | 80.2 | 1.07 [1.05; 1.09]a |
| At home | 16.4 | 12.9 | 18.5 | |
| Missing | 1.3 | 1.5 | 1.2 | |
| Start delivery | ||||
| Elective caesarean section | 4.3 | 3.4 | 4.9 | 1.01 [1.00; 1.02]b |
| Induction of labour | 12.7 | 12.7 | 12.7 | |
| Spontaneous | 76.1 | 76.7 | 75.7 | |
| Missing | 6.9 | 7.2 | 6.7 | |
| Method of delivery | ||||
| Instrumental vaginal delivery | 12.6 | 10.9 | 13.7 | 1.06 [1.03; 1.09]c |
| Emergency caesarean section | 6.7 | 6.7 | 6.6 | |
| Elective caesarean section | 4.8 | 3.8 | 5.4 | |
| Breech | 0.1 | 0.1 | 0.2 | |
| Spontaneous | 66.4 | 69.3 | 64.5 | |
| Missing | 9.4 | 9.2 | 9.6 | |
| Pregnancy outcomes | ||||
| IUGR mid-pregnancy | ||||
| Mean EFW mid-pregnancy (grams, SD) | 381.8 (94.3) | 383.2 (99.0) | 381.0 (91.5) | |
| <p10 | 1.7 | 1.9 | 1.6 | 1.25 [0.88; 1.78] |
| Missing | 6.2 | 7.1 | 5.6 | |
| IUGR late pregnancy | ||||
| Mean EFW late pregnancy (grams, SD) | 1,617.4 (262.8) | 1,602.4 (267.5) | 1,626.0 (259.7) | |
| <p10 | 1.6 | 2.2 | 1.2 | 1.78 [1.25; 2.55] |
| Missing | 4.0 | 4.7 | 3.6 | |
| Pre-eclampsia | ||||
| Yes, pre-eclampsia | 2.4 | 3.0 | 2.1 | 1.46 [1.09; 1.95] |
| Missing | 2.8 | 2.7 | 2.8 | |
| Intrauterine fetal death | ||||
| Yes | 0.5 | 0.7 | 0.3 | 1.94 [1.02; 3.69] |
| Birth outcomes | ||||
| Low birth weight | ||||
| Mean birth weight (grams, SD) | 3,416.0 (559.2) | 3,355.8 (569.0) | 3,451.1 (550.5) | |
| <p10 | 11.9 | 14.5 | 10.4 | 1.41 [1.24; 1.59] |
| Missing | 1.2 | 1.7 | 0.9 | |
| Premature delivery | ||||
| Median gestational age delivery (weeks, range) | 40.1 (22.4–43.6) | 40.0 (22.6–43.6) | 40.2 (22.4–43.4) | |
| <37.0 weeks | 5.2 | 5.9 | 4.8 | 1.22 [1.00; 1.48] |
| Missing | 0.5 | 0.7 | 0.4 | |
| Congenital malformations | ||||
| Yes | 4.2 | 3.8 | 4.4 | 1.07 [0.86; 1.35] |
| Missing | 34.8 | 43.9 | 29.3 | |
| Apgar score 5 min after birth | ||||
| <7 | 1.1 | 1.5 | 0.9 | 1.57 [1.02; 2.41] |
| Missing | 4.1 | 4.0 | 4.1 | |
| Neonatal death | ||||
| Yes | 0.2 | 0.3 | 0.2 | 1.65 [0.66; 4.20] |
| Adverse outcome (Ao) | 21.0 | 23.8 | 19.3 | 1.3 [1.2; 1.5] |
Values represent percentage within column or Relative Risk (95% Confidence Interval)
EFW estimated fetal weight
aRR (95% CI) compared to home delivery (reference)
bRR (95% CI) compared to spontaneous start or induction of labour (reference)
cRR (95% CI) compared to spontaneous vaginal delivery (reference)