Fertility evaluation
| All patients (N=628) | IA diagnosed ≤30 years (N=137) | IA diagnosed 31–40 years (N=149) | IA diagnosed ≥41 years (N=342) | P value | |
| Fertility | |||||
| Male fertility evaluation, n (%) | 93 (15.74) | 27 (20.61)* | 30 (20.69)* | 35 (11.36) | 0.027 |
| Female fertility evaluation (partner), n (%) | 71 (15.04) | 18 (18.56) | 24 (20.69) | 29 (11.42) | 0.069 |
| Male fertility evaluation outcome | |||||
| No male fertility problem identified, n (%) | 47 (7.48) | 14 (10.22) | 14 (9.40) | 19 (5.56) | 0.129 |
| Low sperm quality, n (%) | 33 (5.45) | 9 (6.77) | 12 (8.22) | 12 (3.67) | 0.086 |
| Infertility secondary to unknown cause, n (%) | 7 (1.16) | 3 (2.26) | 3 (2.05) | 1 (0.31) | 0.105 |
| Female fertility evaluation outcome | |||||
| No female fertility problem identified, n (%) | 34 (5.41) | 8 (6.02) | 11 (7.53) | 15 (4.59) | 0.066 |
| Female infertility secondary to known cause‡, n (%) | 24 (3.96) | 6 (4.51) | 9 (6.16) | 9 (2.75) | 0.199 |
| Female infertility secondary to unknown cause, n (%) | 7 (1.16) | 4 (3.01)* | 2 (1.37) | 1 (0.31) | 0.047 |
*P≤0.05 compared with those diagnosed age ≥41 years.
†P≤0.05 compared with those diagnosed age ≥31–40 years.
‡Endometriosis, fallopian tube obstruction, polycystic ovary syndrome, uterine abnormality, early menopause.
IA, inflammatory arthritis.