Analysis of covariance: effect of dichotomised age at diagnosis of IA (based on our study groups) on total number of children per man and considering the total number of children of men diagnosed ≥41 years as our reference group
| Crude (n=615) | Adjusted* (n=609) | |||
| B (95% CI) | P value | B (95% CI) | P value | |
| 31–40 years | −0.398 (−0.624 to −0.171) | 0.001 | −0.207 (−0.455 to 0.040) | 0.101 |
| ≤30 years | −0.517 (−0.744 to −0.291) | 0.000 | −0.406 (−0.660 to −0.152) | 0.002 |
*Adjusted for confounders (age at inclusion in the study, education level, cardiovascular disease, diagnosis of infertility in partner and diagnosis of RA, JIA and SpA).
IA, inflammatory arthritis; JIA, juvenile idiopathic arthritis; RA, rheumatoid arthritis; SpA, spondyloarthritis.