Table 3.
Factors associated with preterm delivery (N = 500)
| Factors | Mean ± SD or n (%) | Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|---|---|
|
Term
(n = 436) |
Preterm
(n = 64) |
p-value |
Crude OR
(95% CI) |
p-value | Adjust OR (95% CI) | |
| Age (years) | ||||||
| 18–24.9 | 117 (88.6) | 15 (11.4) | 1 | |||
| 25–34.9 | 199 (87.7) | 28 (12.3) | 0.785 |
1.10 (0.56, 2.14) |
||
| ≥ 35 | 120 (85.1) | 21 (14.9) | 0.390 |
1.37 (0.67, 2.78) |
||
| Parity | ||||||
| 0 | 252 (88.4) | 33 (11.6) | 1 | 1 | ||
| ≥ 1 | 184 (85.6) | 31 (14.4) | 0.348 |
1.29 (0.76, 2.18) |
0.359 |
1.29 (0.75, 2.22) |
| BMI (kg/m2) | ||||||
| ≤ 18 | 50 (90.9) | 5 (9.1) | 1 | 1 | ||
| 18–25 | 300 (88.0) | 41 (12.0) | 0.530 |
1.37 (0.52, 3.63) |
0.627 |
1.28 (0.48, 3.42) |
| > 25 | 86 (82.7) | 18 (17.3) | 0.168 |
2.09 (0.73, 5.98) |
0.205 |
2.00 (0.69, 5.81) |
| LUW thickness | ||||||
| ≥ 4.5 mm | 405 (88.0) | 55 (12.0) | 1 | 1 | ||
| < 4.5 mm | 31 (77.5) | 9 (22.5) | 0.061 |
2.14 (0.97, 4.73) |
0.037 |
2.37 (1.05, 5.32) |