Table 2 Association of women’s obstetric history and pregnancy outcome with preterm delivery
From: Incidence and risk factors of preterm birth in a rural Bangladeshi cohort
Obstetric history | Live births (n = 32,126) | Preterm births (n = 7,161) | RR | 95% CI | P value | |
|---|---|---|---|---|---|---|
Number | Number | Percent (row) | ||||
Birth Order | ||||||
First child | 6886 | 1343 | 19.5 | 0.80 | 0.76 – 0.85 | <0.001 |
Second child | 6290 | 1371 | 21.8 | 0.90 | 0.85 – 0.95 | <0.001 |
Third child | 5315 | 1135 | 21.4 | 0.88 | 0.83 – 0.93 | <0.001 |
Fourth or higher | 13635 | 3312 | 24.3 | Ref. | - | Â |
Sex of the baby delivered | ||||||
Female | 15414 | 3277 | 21.3 | 0.91 | 0.88 – 0.95 |  |
Male | 16712 | 3884 | 23.2 | Ref. | - | Â |
Multiple pregnancy | ||||||
Yes | 835 | 367 | 44.0 | 2.02 | 1.87 – 2.19 | <0.001 |
No | 31291 | 6794 | 21.7 | Ref. | - | Â |
History of still birth or abortion | ||||||
Yes | 7898 | 2014 | 25.5 | 0.99 | 0.94 – 1.05 | >0.73 |
No | 24228 | 5177 | 21.4 | Ref. | - | Â |
History of child death | ||||||
Yes | 5853 | 1295 | 22.1 | 1.20 | 1.15 – 1.25 | <0.001 |
No | 26273 | 5866 | 22.3 | Ref. | - | Â |