Table 1 Comparison of patient characteristics among the two study groups
TSH 0.27–2.5 mIU/L n = 543 1110 cycles | TSH 2.51–4.5 mIU/L n = 183 355 cycles | ||
|---|---|---|---|
Age (years)* | 29 (19–40) | 29 (19–40) | 0.07 |
Age range | |||
< 35 | 476 (87.6%) | 160 (87.4%) | 0.85 |
≥ 35 | 67 (12.4%) | 23 (12.6%) | |
Body mass index (kg/m2)* | 24.2 (18.2–34.8) | 23.4 (18.1–34.8) | 0.08 |
Body mass index range | |||
< 25 | 316 (58.2%) | 119 (65.0%) | 0.67 |
25–29.9 | 182 (33.5%) | 53 (28.9%) | |
≥ 30 | 45 (8.2%) | 11 (6.1%) | |
Primary infertility | 466 (85.8%) | 303 (85.5) | 0.92 |
Infertility duration (years)* | 4.02 (2–9) | 4.44 (2–10) | 0.38 |
Infertility duration range | |||
< 3 years | 165 (30.5%) | 57 (31.1%) | 0.78 |
3–5 years | 212 (39.0%) | 79 (43.1%) | |
> 5 years | 166 (30.5%) | 47 (25.6%) | |
History of pelvic surgery | 77 (14.1%) | 27 (14.7%) | 0.84 |
Smokers, n | 104 (19.3%) | 36 (19.8%) | 0.87 |
Smoking ranges | |||
1–5 cigarettes/day | 42 (7.7%) | 12 (6.5%) | 0.71 |
6–10 cigarettes/day | 45 (8.2%) | 18 (9.8%) | |
> 10 cigarettes/day | 17 (3.1%) | 6 (3.2%) | |
Alcohol use, n | 8 (1.4%) | 4 (2.1%) | 0.547 |
Basal assessment on day 2 | |||
FSH level (IU/L)* | 6.8 (2.4 -9.9) | 6.8 (1.8–10.0) | 0.801 |
Prolactin, ng/mL * | 14.0 (4–30) | 14.1 (5–30) | 0.100 |
LH level (IU/L) * | 4.8 (0.8–40.0) | 5.1 (1.4–41.0) | 0.091 |
Antral follicle count, n* | 9 (8–23) | 9 (8–24) | 0.128 |
Total motile sperm count (millions) * | 43 (10–346) | 41 (10–330) | 0.835 |