Table I.
Characteristics of the patients in the full analysis set according to study group.
| Variable | Time-lapse group (n = 369) | Control group (n = 376) |
|---|---|---|
| Female age (years) | 33.4 (4.2) | 33.6 (4.1) |
| 33 (30; 37) | 33 (30; 37) | |
| Female height (cm) | 168.2 (6.5) | 167.7 (6.2) |
| 169 (164; 172) | 168 (163; 172) | |
| Female weight (kg) | 70.4 (13.1) | 69.6 (13.6) |
| 68 (61; 77) | 67 (60; 78) | |
| Female BMI (kg/m2) | 24.9 (4.4) | 24.7 (4.4) |
| 24 (21.5; 27.7) | 23.6 (21.5; 27.3) | |
| Smoking female | ||
| Non-smoker | 357 (98.6%) | 361 (97.6%) |
| <5 cigarettes/day | 1 (0.3%) | 7 (1.9%) |
| 5–10 cigarettes/day | 4 (1.1%) | 1 (0.3%) |
| 11–20 cigarettes/day | 0 (0.0%) | 1 (0.3%) |
| Taking snuff (snus) female | ||
| Non-snuffer | 348 (96.1%) | 358 (96.8%) |
| Occasionally | 5 (1.4%) | 5 (1.4%) |
| Daily | 9 (2.5%) | 7 (1.9%) |
| Partner age (years) | 35.8 (5.7) | 35.6 (5.6) |
| 35 (31; 39) | 35 (31; 39) | |
| Smoking partner | ||
| Non-smoker | 311 (97.2%) | 299 (94.9%) |
| <5 cigarettes/day | 2 (0.6%) | 8 (2.5%) |
| 5–10 cigarettes/day | 3 (0.9%) | 2 (0.6%) |
| 11–20 cigarettes/day | 2 (0.6%) | 5 (1.6%) |
| >20 cigarettes/day | 2 (0.6%) | 1 (0.3%) |
| Taking snuff (snus) partner | ||
| Non-snuffer | 251 (78.4%) | 245 (77.8%) |
| Occasionally | 11 (3.4%) | 6 (1.9%) |
| Daily | 58 (18.1%) | 64 (20.3%) |
| Previous pregnancies in current relationship | ||
| 0 | 218 (59.1%) | 220 (58.5%) |
| 1 | 85 (23.0%) | 85 (22.6%) |
| 2 | 40 (10.8%) | 44 (11.7%) |
| 3 | 12 (3.3%) | 12 (3.2%) |
| 4 | 7 (1.9%) | 9 (2.4%) |
| 5 or more | 7 (1.9%) | 6 (1.6%) |
| Previous births in current relationship | ||
| 0 | 287 (77.8%) | 280 (74.5%) |
| 1 | 76 (20.6%) | 90 (23.9%) |
| 2 | 6 (1.6%) | 5 (1.3%) |
| 3 | 0 (0.0%) | 1 (0.3%) |
| Number of started IVF cycles leading to oocyte retrieval | 0.775 (1.288) | 0.870 (1.622) |
| 0 (0; 1) | 0 (0; 1) | |
| Type of menstruation | ||
| Regular | 312 (85.0%) | 323 (86.1%) |
| Irregular | 55 (15.0%) | 52 (13.9%) |
| Indication | ||
| Hormonal (hypogonadotropic hypogonadism World Health Organization class I) | 20 (5.4%) | 11 (2.9%) |
| Male | 83 (22.5%) | 81 (21.6%) |
| Endometriosis | 19 (5.1%) | 21 (5.6%) |
| Cervical factor | 1 (0.3%) | 0 (0.0%) |
| Polycystic ovary syndrome (Rotterdam criteria) | 19 (5.1%) | 21 (5.6%) |
| Tubal factor | 34 (9.2%) | 22 (5.9%) |
| Same sex | 18 (4.9%) | 23 (6.1%) |
| Unexplained | 139 (37.7%) | 152 (40.5%) |
| Other reasons | 29 (7.9%) | 35 (9.3%) |
| Single | 7 (1.9%) | 9 (2.4%) |
| Origin of sperm | ||
| Ejaculated | 310 (84.0%) | 308 (81.9%) |
| Donated | 47 (12.7%) | 58 (15.4%) |
| Percutaneous epididymal sperm aspiration (PESA) | 2 (0.5%) | 2 (0.5%) |
| Testicular sperm aspiration (TESA) | 5 (1.4%) | 5 (1.3%) |
| Testicular sperm aspiration extraction (TESE) | 1 (0.3%) | 0 (0.0%) |
| Thawed | 4 (1.1%) | 3 (0.8%) |
For categorical variables, n (%) is presented.
For continuous variables, mean (SD), median (Q1; Q3) is presented.