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. 2009 Dec 7;127(4):216–222. doi: 10.1590/S1516-31802009000400007

Table 5. Regression equations for estimates at the bone sites evaluated among the women with rheumatoid arthritis.

Equations R R2 adjusted P
Lumbar spine BMD model = 1.153 + 0.005 (W) - 0.005 (D) - 0.004 (A) - 0.003 (FI) 0.626 0.360 0.000
Femoral neck BMD model = 0.764 + 0.000 (ALM) - 0.005 (A) - 0.005 (D) - 0.003 (PTH) 0.698 0.460 0.000
Total femur BMD model = 0.552 + 0.06 (W) + 0.019 (TPA) - 0.05 (A) - 0.003 (D) 0.711 0.481 0.000

BMD = bone mineral density; W = weight; D = disease duration; A = age; FI = fat intake (%); ALM = appendicular lean mass; PTH = parathyroid hormone; TPA = total physical activity.