Table 1. Baseline characteristics of women who had a spontaneous preterm delivery and women who delivered at term.
| Characteristic | Spontaneous Preterm Delivery N=77 | Term Delivery N=756 | P |
|---|---|---|---|
|
| |||
| Maternal age (years)a | 22 (19-27) | 23 (20-27) | 0.45 |
|
| |||
| Nulliparity | 31 (40.3) | 301 (39.9) | 0.95 |
|
| |||
| History of prior PTB | 17 (22.1) | 75 (9.9) | <0.01 |
|
| |||
| Body mass index (kg/m2)a | 25.8 (22.3-31.4) | 25.9 (22.4-31.3) | 0.97 |
|
| |||
| Smoking | 21 (27.6) | 267 (35.4) | 0.18 |
|
| |||
| Birthweighta | 2440 (1940-2723) | 3260 (2973-3560) | <0.01 |
|
| |||
| Periodontal disease | |||
| Yes | 59 (76.6) | 568 (75.1) | 0.77 |
| No | 18 (23.4) | 188 (24.9) | |
|
| |||
| Preterm premature rupture of membranes | |||
| Yes | 42 (54.5) | ||
| No | 35 (45.5) | ||
a
Data presented as median values (interquartile range), in all other cases data represents n (%).