Table 2.
Multilevel logistic regression analyses of the probability for live births following all ICSI or IVF/ICSI cycles according to gender and stratified by BMI
| Variables | n (%) | ORa | 95% CI | P valueb | |
|---|---|---|---|---|---|
| Femaleb BMI, (n=990 ICSI cycles among 990 women) | |||||
| Ovulatory | |||||
| Underweight | 48 (6.1) | 6.5 | (2.1-20.65) | 0.001 | |
| Normal weight | 298 (37.9) | Reference group | - | - | |
| Overweight | 328 (41.0) | 0.30 | (0.11-0.83) | 0.021 | |
| Obese | 112 (14.2) | 0.14 | (0.02-0.99) | 0.049 | |
| Trend | 786 (100) | 0.91 | (0.83-0.99) | 0.045 | |
| Anovulatory | |||||
| Underweight | 11 (5.3) | 7.30 | (0.99-55.1) | 0.050 | |
| Normal weight | 59 (28.9) | Reference group | - | - | |
| Overweight | 84 (41.1) | 0.50 | (0.10-2.4) | 0.392 | |
| Obese | 50 (24.5) | 0.14 | (0.009-2.4) | 0.186 | |
| Trend | 204 (100) | 0.85 | (0.72-0.98) | 0.021 | |
| Maleb BMI, (n=990 ICSI cycles among 990 men) | |||||
| Underweight | 45 (4.5) | 0.295 | (0.02-3.96) | 0.352 | |
| Normal weight | 297 (30.0) | Reference group | - | - | |
| Overweight | 425 (42.9) | 0.07 | (0.0-10.71) | 0.360 | |
| Obese | 223 (22.5) | 0.012 | (0.0-21.89) | 0.294 | |
| Trend | 990 (100) | 1.01 | (0.95-1.09) | 0.647 | |
OR; Odds ratio, CI: Confidence interval, BMI; body mass index, IVF; In vitro fertilization, ICSI; Intra-cytoplasmic sperm injection, a; ORs with 95% CIs and P values from Wald tests, and b; Female analyses adjusted for age and duration of infertility. Male analyses adjusted for age, duration of infertility, and smoking status.