Possible risk factors of low bone mass (T score ⩽−1) at the spine L2–4, total hip, and femoral neck
| Spine L2–4 | Total hip | Femoral neck | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| β | OR | CI | β | OR | CI | β | OR | CI | |||
| Age ⩾60 | 1.29 | 3.62 | 2.21 to 5.92 | 1.13 | 3.10 | 1.81 to 5.29 | 1.42 | 4.13 | 2.43 to 7.01 | ||
| BMI6-150 2 lowest quartiles | 0.89 | 2.43 | 1.49 to 3.97 | 1.43 | 4.17 | 2.45 to 7.11 | 0.86 | 2.37 | 1.44 to 3.92 | ||
| Deformed joints | −0.08 | 0.93 | 0.57 to 1.50 | 0.48 | 1.62 | 0.97 to 2.70 | 0.48 | 1.61 | 0.98 to 2.66 | ||
| MHAQ6-150 ⩾1.5 | 0.48 | 1.62 | 0.97 to 2.71 | 0.84 | 2.31 | 1.35 to 3.97 | 0.62 | 1.86 | 1.10 to 3.14 | ||
| DAS6-150 2 highest quartiles | 0.19 | 1.20 | 0.72 to 2.00 | −0.04 | 0.96 | 0.56 to 1.65 | 0.12 | 1.13 | 0.67 to 1.91 | ||
| Current use of corticosteroids | 0.89 | 2.44 | 1.51 to 3.93 | 0.75 | 2.11 | 1.27 to 3.53 | 0.55 | 1.74 | 1.05 to 2.86 | ||
| Non-vertebral fracture | 0.47 | 1.59 | 0.89 to 2.85 | 1.17 | 3.23 | 1.63 to 6.37 | 0.69 | 2.00 | 1.05 to 3.83 | ||
| Constant | −1.97 | −2.06 | −1.63 | ||||||||
| Sensitivity/specificity (%) | 69/70 | 74/69 | 73/65 | ||||||||
↵6-150 BMI = body mass index; MHAQ = Modified Health Assessment Questionnaire; DAS = disease activity score.