Table I.
Baseline characteristics of the patients.
| Characteristics | Endometriosis (n=191) | Controla (n=312) | p-value | |
|---|---|---|---|---|
| Age at start IVF, median (Q1-Q3) years | 33.2 (30.4-37.7) | 36.1 (32.0-39.3) | <0.001 | |
| BMI, median ± (Q1-Q3) kg/m 2 b | 22.5 (20.6-25.7) | 23.4 (21.5-26.0) | 0.07 | |
| Smoking– n (%) c | 25 (15.6) | 31 (13.7) | 0.59 | |
| Drinking – n (%) d | 66 (42.6) | 88 (40.6) | 0.70 | |
| Infertility– n (%) | <0.001 | |||
| Primary | 131 (68.6) | 136 (43.6) | ||
| Secondary | 60 (31.4) | 176 (56.4) | ||
| Previous surgery – n (%) | ||||
| Abdominal surgery e | 29 (16.4) | 30 (11.9) | 0.18 | |
| Reproductive surgery f | 126 (70.4) | 78 (30.8) | <0.001 | |
| Hysteroscopic surgery or curettage g | 27 (15.1) | 31 (12.3) | 0.40 | |
| Chromopertubation f | 106 (59.2) | 101 (39.9) | <0.001 | |
| No surgery h | 8 (9.1) | 55 (29.6) | <0.001 | |
| GnRH treatment– n (%) i | 0.24 | |||
| Lucrin | 2 (1.1) | 2 (0.8) | ||
| Synarel | 27 (14.8) | 44 (17.7) | ||
| Decapeptyl | 121 (66.5) | 157 (63.1) | ||
| Triptofem | 4 (2.2) | 0 (0.0) | ||
| Cetrotide | 5 (2.7) | 8 (3.2) | ||
| Orgalutran | 4 (2.2) | 3 (1.2) | ||
| Name unknown | 19 (10.4) | 33 (13.3) | ||
| No GnRH treatment | 0 (0.0) | 2 (0.8) | ||
| Endometriosis classification j | ||||
| rASRM I/II – n (%) | 19 (16) | - | ||
| rASRM III-IV – n (%) | 99 (84) | - | ||
a Defined as tubal disease + unexplained infertility as IVF indication; b Missing values: 55 (endometriosis), 139 (other); c Smoking at start of IVF treatment; Missing values: 31 (endometriosis), 85 (other); d Drinking at start of IVF treatment; Missing values: 36 (endometriosis), 95 (other); e Missing values: 14 (endometriosis), 59 (other); f Missing values: 12 (endometriosis), 59 (other); g Missing values: 7 (endometriosis), 60 (other); h Missing values: 103 (endometriosis), 126 (other); i Missing values: 9 (endometriosis), 63 (other); j The total number of observations was not 191 due to no r-ASRM classification in 72 patients.