Table 2.
Odds ratio (OR) estimates of maternal mortality by demographic and clinical characteristics of the study population using logistic regression model (pseudo R2=0.5698)
| Variable | Controls (n=148) | Cases (n=37) | Unadjusted OR (95% CI) | p-value | Adjusted OR (95% CI)1 | p-value |
|---|---|---|---|---|---|---|
| Maternal age at delivery (yr) | ||||||
| <34 | 126 | 27 | 1.00 | 1.00 | ||
| ≥35 | 20 | 10 | 2.45 (1.01-5.99) | 0.049 | 8.48 (1.26-56.99) | 0.03 |
| Body mass index (kg/m2) | ||||||
| Normal weight (18.5-24.9) | 85 | 11 | 1.00 | 1.00 | ||
| Underweight (<18.5) | 12 | 3 | 1.86 (0.42-8.14) | 0.41 | 2.10 (0.07-65.43) | 0.67 |
| Overweight/obese (≥25.0) | 34 | 14 | 3.63 (1.33-9.89) | 0.01 | 10.99 (1.65-73.22) | 0.01 |
| Type of delivery | ||||||
| Normal vaginal delivery | 82 | 12 | 1.00 | 1.00 | 0.91 | |
| Cesarean section | 64 | 18 | 1.83 (0.82-4.09) | 0.14 | 0.92 (0.22-3.89) | |
| Person who managed delivery | ||||||
| Midwife | 80 | 11 | 1.00 | |||
| Obstetrician | 66 | 18 | 1.86 (0.82-4.19) | 0.14 | - | - |
| Gravidity | ||||||
| First | 71 | 13 | 1.00 | |||
| Per unit increase in gravidity | 75 | 24 | 1.56 (1.08-2.25) | 0.02 | - | - |
| Gestational age (wk) | ||||||
| Term (37-42) | 117 | 19 | 1.00 | 1.00 | ||
| Preterm (< 37) | 25 | 15 | 4.30 (1.82-10.17) | 0.001 | 1.73 (0.34-8.88) | 0.51 |
| Systemic disease2 | ||||||
| No | 121 | 17 | 1.00 | 1.00 | ||
| Yes | 22 | 17 | 6.88 (2.61-18.17) | 0.001 | 17.54 (2.71-113.42) | 0.003 |
CI, confidence interval.
1
OR adjusted for other variables in the table;
2
Systemic diseases included heart disease, diabetes, high blood pressure, renal disease, and thyroid impairment.