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Table 2 Influence of disease related factors on BMDa at the spine and femoral neck.

From: Influence of arthritis and non-arthritis related factors on areal bone mineral density (BMDa) in women with longstanding inflammatory polyarthritis: a primary care based inception cohort

  Baseline 10th Anniversary
  Femoral Neck (g/cm2)
ß1 coefficient
Lumbar Spine (g/cm2)
ß1 coefficient
Femoral Neck (g/cm2)
ß1 coefficient
Lumbar Spine (g/cm2)
ß1 coefficient
Swollen joint count:     
Lower Referent Referent Referent Referent
Mid -0.043 (-0.096, 0.009) 0.003 (-0.061, 0.066) -0.015 (-0.068, 0.039) -0.061 (-0.123, 0.001)
Upper -0.024 (-0.073, 0.025) -0.012 (-0.071, 0.048) -0.018 (-0.071, 0.035) -0.020 (-0.081, 0.040)
Tender joint count:     
Lower Referent Referent Referent Referent
Mid 0.001 (-0.051, 0.052) -0.020 (-0.081, 0.042) -0.025 (-0.075, 0.026) -0.015 (-0.075, 0.045)
Upper -0.023 (-0.076, 0.029) -0.027 (-0.090, 0.036) 0.004 (-0.051, 0.058) -0.007 (-0.070, 0.057)
Both swollen & tender jt count:     
Lower Referent Referent Referent Referent
Mid 0.022 (-0.030, 0.074) -0.007 (-0.070, 0.056) -0.012 (-0.078, 0.055) 0.020 (-0.059, 0.098)
Upper -0.009 (-0.059, 0.040) 0.002 (-0.058, 0.061) -0.001 (-0.051, 0.048) 0.008 (-0.050, 0.066)
Deformed joint count:     
Lower - - Referent Referent
Mid    -0.047 (-0.098, 0.004) -0.059 (-0.121, 0.003)
Upper    -0.067 (-0.117, -0.018)* -0.046 (-0.106, 0.015)
Erosive joint count:     
Lower - - Referent Referent
Mid    -0.084 (-0.160, -0.008)* -0.126 (-0.213, -0.039)*
Upper - - -0.031 (-0.100, 0.039) -0.014 (-0.093, 0.066)
CRP level:     
Normal <10 mg/L Referent Referent Referent Referent
Elevated ≥10 mg/L 0.044 (-0.003, 0.091) 0.041 (-0.017, 0.100) 0.031 (-0.013, 0.075) 0.030 (-0.026, 0.086)
HAQ score (0-3) -0.004 (-0.034, 0.027) -0.003 (-0.040, 0.034) -0.003 (-0.031, 0.025) -0.010 (-0.043, 0.024)
Steroid use (ever vs never) - - 0.006 (-0.055, 0.067) 0.008 (-0.065, 0.081)
DMARD use (ever vs never) - - 0.016 (-0.035, 0.068) -0.016 (-0.079, 0.048)
  1. 1adjusted for age. *p < 0.05