Table 4

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

VariableEstimateSE95% CI
(Intercept)4.6480.3503.962 to 5.334
Biological age—per year†−0.0770.007−0.090 to −0.063§
Disease duration‡0.0150.031−0.046 to 0.076
Presence of ACPA‡−0.5440.349−1.227 to 0.140
Presence of erosions‡−0.0760.239−0.545 to 0.393
Presence of RF‡−0.3120.281−0.863 to 0.239
Ever used MTX0.0050.187−0.361 to 0.372
Age*disease duration−0.0010.001−0.002 to 0.001
ACPA*erosions0.3640.447−0.512 to 1.239
ACPA*RF0.4130.441−0.451 to 1.276
Erosions*RF−0.1460.390−0.910 to 0.618
ACPA*erosions*F−0.1210.573−1.243 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.