Parameters r P-value
OC / resistin - 0.36 0.0341
glucose / resistin - 0.49 0.0030
glucose / IL-6 - 0.49 0.0030
insulin / disease duration  0.40 0.0168
HOMA-IR / disease duration  0.36 0.0340
IL-6 / IGFBP-3 - 0.35 0.0387
IGF-1 / IGFBP-3   0.43 0.0091
IGF-1 to IGFBP-3 ratio / ESR 0.46 0.0057
IGF-1 to IGFBP-3 ratio / hsCRP   0.39 0.0215
ESR, erythrocyte sedimentation rate; hsCRP, high sensitivity C-reactive protein; HOMA-IR,, homeostasis model assessment of insulin resistance; IGF-1, insulinlike growth factor-1; IGFBP-3, insulin-like growth factor binding protein-3,;IL-6, interleukin 6; OC, osteocalcin
Table 2: Relationships between biochemical indices, ESR and disease duration in patients with RA.