Effects of HRT in postmenopausal women with rheumatoid arthritis. The associations between (a) baseline levels of erythrocyte sedimentation rate (ESR) and interleukin-6 (IL-6), (b) the changes in ESR and IL-6 after 2-year follow-up, and (c) the changes in ESR and IGF-1 after 2-year follow-up are shown in scattergram plots. Spearman rank correlation coefficients (rs) and P values are given.
d'Elia et al. Arthritis Res Ther 2003 5:R202-R209 doi:10.1186/ar761