Table 3.
Associated factors for severe maternal morbidity using simple logistic regression
| Variable | Crude OR a | (95 % CI b) | Wald statc | P value |
|---|---|---|---|---|
| Parity | 1.1 | (1.02, 1.18) | 5.91 | 0.015 |
| Age | ||||
| <35 years | 1.0 | 29.00 | <0.001 | |
| ≥35 years | 2.6 | (1.83, 3.78) | ||
| Education level | ||||
| Nil and Primary | 1.0 | 3.93 | 0.141 | |
| Secondary | 0.8 | (0.36, 1.67) | ||
| Tertiary | 1.1 | (0.49, 2.36) | ||
| Occupation | ||||
| Unemployed | 1.0 | 6.68 | 0.083 | |
| Self-employed | 0.8 | (0.48, 1.47) | ||
| Support group | 1.1 | (0.74, 1.51) | ||
| Professional | 1.8 | (1.10, 2.92) | ||
| Comorbidity | ||||
| Absent | 1.0 | 5.19 | 0.023 | |
| Present | 1.8 | (1.08, 2.98) | ||
| h/o abortion | ||||
| Absent | 1.0 | 0.08 | 0.784 | |
| Present | 1.0 | (0.66, 1.36) | ||
| h/o caesarean section | ||||
| Absent | 1.0 | (1.42, 3.10) | 14.27 | <0.001 |
| Present | 2.1 | |||
| Past pregnancy complications | ||||
| Absent | 1.0 | 20.62 | <0.001 | |
| Present | 2.5 | (1.68, 3.87) | ||
| Booking | ||||
| Early (≤12 weeks) | 1.0 | 0.09 | 0.763 | |
| Late (>12 weeks) | 0.96 | (0.71, 1.28) | ||
| BMI at booking (kg/m2) | ||||
| Normal | 1.0 | 35.44 | <0.001 | |
| Underweight | 0.6 | (0.32, 1.02) | ||
| Overweight | 1.6 | (1.09, 2.29) | ||
| Obese | 2.6 | (1.74, 3.86) | ||
| Antenatal care visits | ||||
| Optimum (≥8 visits) | 1.0 | 8.60 | 0.003 | |
| Suboptimum (<7 visits) | 2.3 | (1.30, 4.13) | ||
| Mode of delivery | ||||
| Vaginal delivery | 1.0 | 207.24 | <0.001 | |
| Caesarean section | 10.6 | (7.44, 14.96) | ||
| Period of gestation | ||||
| Term (≥37 weeks) | 1.0 | <0.001 | ||
| Preterm (<37 weeks) | 7.3 | (4.28, 12.31) | 72.95 | |
| Referral status | ||||
| Not referred | 1.0 | 111.27 | <0.001 | |
| Referred | 5.3 | (3.81, 7.24) | ||
Note. BMI = body mass index
aCrude odds ratio
bConfidence interval
cWald statistic