Table 3. Clinical and statistically significant risk factors for maternal death.
| Risk factor | Frequency |
OR | 95% CI | P-value | ||
|---|---|---|---|---|---|---|
| Cases | Controls | |||||
| Characteristics of hospital providing initial care | ||||||
| Availability of essential obstetric care: | 8.00 | 1.00–63.96 | 0.050 | |||
| No | 8 | 1 | ||||
| Yes | 74 | 83 | ||||
| Number of deliveries/year: | 9.00 | 2.09–38.79 | 0.003 | |||
| < 1500 deliveries/year | 58 | 3 | ||||
| ≥ 1500 deliveries/year | 19 | 80 | ||||
| Obstetrics-gynaecology specialist on 24-hour active duty: | 8.00 | 1.84–34.79 | 0.006 | |||
| No | 18 | 4 | ||||
| Yes | 60 | 80 | ||||
| Characteristics of hospital where death or complications occurred | ||||||
| Availability of essential obstetric care: | 16.00 | 2.12–120.65 | 0.007 | |||
| No | 16 | 1 | ||||
| Yes | 68 | 83 | ||||
| Number of deliveries/year: | 5.00 | 1.09–22.82 | 0.038 | |||
| < 1500 | 10 | 3 | ||||
| ≥ 1500 | 60 | 79 | ||||
| Obstetrics-gynaecology specialist on 24-hour active duty: | 22.00 | 2.96–163.21 | 0.003 | |||
| No | 25 | 4 | ||||
| Yes | 57 | 80 | ||||
| Delivery of care | ||||||
| Length of hospitalization (days): | 3.86 | 1.68–8.86 | 0.001 | |||
| > 5 | 56 | 31 | ||||
| 1–5 | 23 | 42 | ||||
| Characteristics of attending staff | ||||||
| Presence of residency programme: | 5.50 | 1.22–24.81 | 0.027 | |||
| No | 11 | 2 | ||||
| Yes | 73 | 82 | ||||
| Biological and social characteristics | ||||||
| Age > 19 years: | 4.67 | 1.34–16.24 | 0.015 | |||
| > 19 | 76 | 65 | ||||
| 15–19 | 8 | 19 | ||||
| Age ≥ 35 years: | 2.22 | 1.01–4.88 | 0.047 | |||
| ≥ 35 | 26 | 15 | ||||
| < 35 | 58 | 69 | ||||
| Previous gestations: | 2.18 | 1.07–4.45 | 0.032 | |||
| ≥ 4 | 38 | 23 | ||||
| 0–3 | 43 | 56 | ||||
CI, confidence interval; OR, odds ratio.