Table III.
Multiple logistic regression analysis to account for confounding variables.
| Term LBW (n = 143) | Unadjusted OR (95% CI) | P | Adjusted OR (95% CI) | P |
|---|---|---|---|---|
| E2 level on the day of hCG trigger (<2500 vs ≥2500 pg/ml) | 12.1 (9.2–15.7) | <0.001 | 10.8 (9.2–12.5) | <0.001 |
| Age (<35 vs ≥35 years) | 0.97 (0.7–1.3) | 0.79 | 0.88 (0.7–1.9) | 0.68 |
| Parity (0 vs ≥1) | 1.08 (0.8–1.7) | 0.69 | 1.01 (0.8–1.4) | 0.45 |
| BMI(<25 vs ≥25 kg/m2) | 0.94 (0.7–1.3) | 0.63 | 1.06 (0.6–2.2) | 0.54 |
| Race (white vs non-white) | 0.82 (0.4–1.8) | 0.37 | 0.74 (0.5–1.9) | 0.16 |
| Infertility diagnosis (male factor vs others) | 1.13 (0.8–1.5) | 0.26 | 1.08 (0.8–1.8) | 0.14 |
| Ovarian stimulation protocol (GnRH-agonist vs GnRH-antagonist based) | 1.04 (0.8–1.8) | 0.21 | 0.94 (0.7–1.9) | 0.15 |
| Duration of ovarian stimulation (<10 vs ≥10 days) | 0.88 (0.7–1.2) | 0.49 | 0.98 (0.6–1.7) | 0.33 |
| Gonadotropin dose (<2000 vs ≥2000 IU) | 1.18 (0.5–2.7) | 0.71 | 1.44 (0.5–3.9) | 0.58 |
| hCG trigger dose (10 000 IU vs 5000 IU/4000 IU/3330 IU) | 0.93 (0.4–1.9) | 0.60 | 1.39 (0.5–2.6) | 0.39 |
| Peak endometrial thickness (<10 vs ≥10 mm) | 0.75 (0.6–1.3) | 0.11 | 0.70 (0.6–1.2) | 0.14 |
| ICSI (yes vs no) | 0.60 (0.2–1.9) | 0.38 | 0.69 (0.4–1.8) | 0.35 |
| Blastocyst-stage ET (yes vs no) | 0.47 (0.1–11.6) | 0.77 | 0.59 (0.1–6.1) | 0.64 |