| Prematurity | ||||
| Variables | Terms | Yes (n = 255) | No (n = 1011) | p-value |
| Health zone | Gombe | 63 | 359 | 0.002 |
| Kingasani | 104 | 318 | ||
| Lime | 88 | 334 | ||
| Tribe | Bakongo | 66 | 174 | 0.015 |
| Bengali | 82 | 375 | ||
| Baswahili | 55 | 221 | ||
| Luba | 52 | 241 | ||
| Age (median) IQR] | 30.00 | 29.00 | 0.763 | |
| Marital status | Single | 25 | 148 | <0.001 |
| Divorcee | 11 | 79 | ||
| Bride | 189 | 600 | ||
| Free union | 10 | 40 | ||
| Widow | 20 | 144 | ||
| Legitimacy of marriage | Yes | 150 | 662 | 0.056 |
| No | 105 | 349 | ||
| Type of marriage (%) | Monogamous | 247 | 946 | 0.062 |
| Polygamous | 8 | 65 | ||
| Person in charge (median [IQR]) | 8.00 | 7.00 | 0.174 | |