| Table 8. Baseline reproductive characteristics and hormone levels of in vitro fertilization (IVF) cycles according to age (n=494). | |||
| < 35 years (n=238) |
≥ 35 years (n=256) |
p-value | |
|---|---|---|---|
| Weight (Kg) | 66.51±13.69 | 64.96±13.64 | NSb |
| Height (cm) | 162.92±6.04 | 163.01±6.16 | NSb |
| BMI (Kg/m2) | 25.05±4.90 | 24.5±5.32 | NSb |
| Primary infertility type [n (%)] | 206 (86.6) | 181 (71.0) | <0.001a |
| Female smoker [n (%)] | 20 (20.6) | 26 (21.7) | NSa |
| Male smoker [n (%)] | 41 (42.7) | 46 (38.3) | NSa |
| Couple smoker [n (%)] | 17 (17.7) | 16 (13.3) | NSa |
| PCOS + other infertility factor [n (%)] | 20 (8.4) | 29 (11.3) | NSa |
| Male infertility factor [n (%)] | 186 (78.2) | 142 (55.5) | <0.001a |
| Duration of infertility (months) | 48.05±29.32 | 54.04±34.98 | 0.041b |
| LH,mIU/mL | 7.44±4.14 | 6.98±5.35 | NSb |
| FSH,mIU/mL | 7.04±2.19 | 8.27±7.30 | 0.014b |
| LH:FSH ratio | 1.15±0.82 | 0.90±0.41 | <0.001 |
| Basal estradiol, pg/mL | 50.57±51.22 | 48.18±30.74 | NSb |
| Progesterone, ng/mL | 0.99±0.73 | 1.10±1.39 | NSb |
Data expressed as mean±standard deviation. p-value < 0.05 was considered statistically significant. BMI: body mass index; PCOS: polycystic ovary syndrome; LH: luteinizing hormone (at beginning of the menstrual cycle); FSH: follicle-stimulating hormone (at beginning of the menstrual cycle); IU - International units; NS - not statistically different; a - Chi-square test; b - One Way ANOVA.