Table 2

BOKS analysis: independent association of standardized biomarkers with BML (BML > 0) per SD of change in marker




Univariate association
Full model (including age, sex and BMI)


Marker
(BML = 0)
(BML > 0)
OR
95% CI
R2
Full model R2
Full model ROC area

Ln-BSAP
3.48 (0.35)
3.57 (0.36)
1.4
(0. 9, 2.0)
2.58
14.56
0.701
Ln-osteocalcin
2.73 (0.51)
2.80 (0.55)
1.2
(0.8, 1.7)
0.8
13.41
0.687
Ln-NTx
-3.47 (1.07)
-3.27 (0.78)
1.4
(1.0, 2.0)
3.05
14.55
0.697

BMI, body mass index; BML, bone marrow; BOKS, Boston Osteoarthritis Knee Study; BSAP, bone-specific alkaline phosphatase; Ln, Natural Log; NTx, type I collagen N-telopeptide; SD, standard deviation.

Hunter et al. Arthritis Research & Therapy 2008 10:R102   doi:10.1186/ar2494