TABLE 1.
Demographic and obstetric characteristics of the preterm delivery and control group before and after PSM analysis
| Pre‐PSM | Post‐PSM | |||||
|---|---|---|---|---|---|---|
| Preterm delivery (n = 105) | Term delivery (n = 1529) | P‐value | Preterm delivery (n = 105) | Term delivery (n = 210) | P‐value | |
| Maternal age (y) | 29.93 ± 4.039 | 29.59 ± 3.823 | .381 | 29.93 ± 4.039 | 30.07 ± 4.201 | .781 |
| Pre‐pregnancy IBM (kg/m2) | 20.17 ± 2.116 | 20.59 ± 8.425 | .619 | 20.17 ± 2.116 | 20.26 ± 2.316 | .760 |
| Gravidity (number) | 1.71 ± 0.917 | 1.76 ± 0.905 | .592 | 1.71 ± 0.917 | 1.90 ± 0.988 | .100 |
| Parity (number) | 0.33 ± 0.494 | 0.37 ± 0.527 | .502 | 0.33 ± 0.494 | 0.45 ± 0.611 | .075 |
| Gestational age at assessment (wk) | 24.75 ± 1.663 | 24.8 ± 1.608 | .779 | 24.75 ± 1.663 | 24.8 ± 1.487 | .871 |
| Gestational age at delivery(weeks) | 35.2 ± 1.477 | 39.25 ± 1.085 | .000 | 35.2 ± 1.477 | 39.06 ± 1.040 | .000* |
| Assessment to delivery interval (d) | 71.1 ± 15.0 | 99.2 ± 13.5 | .000 | 70.2 ± 15.2 | 97.0 ± 12.4 | .000* |
| Delivery weight (g) | 2573.1 ± 442.59 | 3338.9 ± 362.95 | .000 | 2573.1 ± 442.59 | 3344.9 ± 366.96 | .000* |
| PPROM | 64.8% (68/105) | 29.2% (447/1529) | .000 | 64.8% (68/105) | 65.2% (137/210) | .934 |
Abbreviation: PPROM, preterm premature rupture of membranes.
*
P < .05 was accepted as significant.