Estimates of linear-mixed model describing the change of serum anti-Müllerian hormone (AMH) levels (applying square root transformation) with increasing age in 128 female RA patients
| Variable | Estimate | SE | 95% CI |
|---|---|---|---|
| (Intercept) | 4.648 | 0.350 | 3.962 to 5.334 |
| Biological age—per year† | −0.077 | 0.007 | −0.090 to −0.063§ |
| Disease duration‡ | 0.015 | 0.031 | −0.046 to 0.076 |
| Presence of ACPA‡ | −0.544 | 0.349 | −1.227 to 0.140 |
| Presence of erosions‡ | −0.076 | 0.239 | −0.545 to 0.393 |
| Presence of RF‡ | −0.312 | 0.281 | −0.863 to 0.239 |
| Ever used MTX | 0.005 | 0.187 | −0.361 to 0.372 |
| Age*disease duration | −0.001 | 0.001 | −0.002 to 0.001 |
| ACPA*erosions | 0.364 | 0.447 | −0.512 to 1.239 |
| ACPA*RF | 0.413 | 0.441 | −0.451 to 1.276 |
| Erosions*RF | −0.146 | 0.390 | −0.910 to 0.618 |
| ACPA*erosions*F | −0.121 | 0.573 | −1.243 to 1.001 |
†Age is used as time variable in the model.
‡Variable at baseline.
§P<0.05.
ACPA, snti-citrullinated protein antibodies; MTX, methotrexate; RA, rheumatoid arthritis; RF, rheumatoid factor.