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/m 2 ) | ||||||
≤ 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) |