Table 5. Multivariable linear regression model for EuroQOL score and EQ-5D index by knee OA category compared with the non-OA (Pain-/ROA-) group.

	β-coefficient ± SE Pain only (Pain+/ROA-) vs. Non-OA (Pain-/ROA-)	P value	β-coefficient ± SE ROA only (Pain-/ROA+) vs. Non-OA (Pain-/ROA-)	P value	β-coefficient ± SE Painful ROA (Pain+/ROA+) vs. Non-OA (Pain-/ROA-)	P value
EQ-VAS	-10.95 ± 1.09	< 0.001	0.51 ± 0.67	0.448	-9.75 ± 0.98	< 0.001
EQ-5D index	-0.10 ± 0.01	< 0.001	0.01 ± 0.00	0.005	-0.13 ± 0.01	< 0.001

Adjusted for age, sex, income, region, education, marital status, alcohol consumption, smoking status, and body mass index.