β (95% CI) | |||
Number of painful body sites | PPTarm | PainDETECT | |
WOMAC pain | 2.78 (1.05 to 4.51)** | −0.01 (−0.04 to 0.14) | 2.34 (1.79 to 2.88)** |
WOMAC function | 2.46 (0.75 to 4.17)** | −0.02 (−0.05 to 0.01) | 2.27 (1.73 to 2.80)** |
PCS | 0.79 (−1.77 to 0.21) | 0.02 (0.004 to 0.04)* | −0.63 (−0.97 to 0.28)** |
MCS | −1.44 (−2.45 to to 0.42)** | 0.01 (−0.002 to 0.03) | −0.56 (−0.91 to 0.20)** |
Adjustments: age, sex, ethnicity (Chinese vs non-Chinese), education (none, primary, secondary and above), body mass index, radiographic grading (KL0-3 vs KL4) and functional comorbidity index.
Bold: statistically significant associations.
*P<0.05; **p<0.01.
KL, Kellgren-Lawrence grading; MCS, mental component summary; PCS, physical component summary; PPTarm, pressure pain threshold taken at volar side of right forearm; QoL, quality of life; SF-36, Medical Outcome Survey Short-form 36; WOMAC, Western Ontario and McMaster University Index.