Table 4.
The association between maternal age and caesarean section in primiparious women with singleton births. Results of multivariable logistic regression analyses
| Maternal age, years | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ≤29 | 30–34 | ≥35 | |||||||
| Crude OR (95 % CI) | Adjusted OR (95 % CI) | Crude OR (95 % CI) | Adjusted OR (95 % CI) | ||||||
| All CS | ref | 1.45 | (1.10–1.91)* | 1.40 | (1.02–1.92)* | 2.50 | (1.74–3.56)*** | 1.89 | (1.28–2.78)** |
| Elective CS | ref | 1.69 | (1.11–2.55)* | 1.55 | (0.94–2.55) | 2.67 | (1.54–4.61)** | 1.70 | (0.88–3.30) |
| Emergency antepartum CS | ref | 1.64 | (0.68–3.97) | 1.76 | (0.73–4.25) | 2.99 | (1.94–4.61)*** | 2.26 | (1.49–3.40)** |
| Intrapartum CS | ref | 1.11 | (0.63–1.98) | 1.05 | (0.56–1.97) | 1.62 | (0.97–2.69) | 1.44 | (0.92–2.25) |
Multivariable logistic regression analysis with adjustment study design effect and risk factors. Risk factors were included: marital status, height, pre-exiting medical conditions, maternal hypertension, birthweight and health institutions ownership. Pre-exiting medical conditions was defined as presence of any of followings: chronic hypertension, cardiac/renal diseases, chronic respiratory conditions, diabetes mellitus, sickle cell anaemia, severe anaemia and pyelonephritis or urinary infection. Maternal hypertension was defined as presence of pregnancy-induced hypertension, preeclampsia and eclampsia
CS caesarean section, ref reference group
* < 0.05 ** < 0.01 *** < 0.001