Table 1 Baseline characteristics of the unweighted population of patients included in the analysis
|  | r-hFSH-alfa N = 17,725 | hMG HP N = 10,916 | Difference (95% CI) |
|---|---|---|---|
Age (years) at index date, mean (SD) | 33.5 (4.4) | 35.6 (4.9) | 2.07 (1.95, 2.18) |
 n (%) with non-missing data | 17,725 (100) | 10,916 (100) | |
BMI (kg/m2) at index date, mean (SD) | 23.6 (4.4) | 23.7 (4.4) | 0.16 (0.06, 0.27) |
 n (%) with non-missing data | 17,376 (98.0) | 10,691 (97.9) | |
Type of infertility, n (%) | |||
 Male factor | 10,046 (57.7) | 5545 (51.8) | −5.89 (−7.09, −4.70) |
 Endometriosis | 948 (5.4) | 635 (5.9) | 0.49 (− 0.07, 1.05) |
 Hyperandrogenism/PCOS | 463 (2.7) | 245 (2.3) | −0.37 (− 0.74, 0.00) |
 Idiopathic | 1448 (8.3) | 1068 (10.0) | 1.66 (0.96, 2.36) |
 Other | 1317 (7.6) | 871 (8.1) | 0.57 (−0.08, 1.22) |
 Pathological cycle, other endocrine disordera | 650 (3.7) | 417 (3.9) | 0.16 (−0.30, 0.62) |
 Psychological factors | 7 (0.0) | 5 (0.1) | 0.01 (−0.04, 0.06) |
 Status post sterilisation | 21 (0.1) | 56 (0.5) | 0.40 (0.26, 0.55) |
 Tubal pathology | 2410 (13.8) | 1804 (16.9) | 3.01 (2.14, 3.89) |
 Uterine, cervical factor | 109 (0.6) | 63 (0.6) | −0.04 (−0.22, 0.15) |
Year of first stimulation cycle, n (%) | |||
 2007 | 4696 (26.5) | 2688 (24.6) | −1.87 (− 2.91, −0.83) |
 2008 | 4002 (22.6) | 2612 (23.9) | 1.35 (0.34, 2.36) |
 2009 | 4571 (25.8) | 2879 (26.4) | 0.59 (−0.46, 1.63) |
 2010 | 4455 (25.1) | 2736 (25.1) | −0.07 (−1.10, 0.96) |