Table 3.

Relationship between pain and WHODAS disability score.

Variables	Beta coefficient∗	Std error	95% CI		p value
			Lower limit	Upper limit
Frequency of pain
2-3 days a week	11.1	1.4	8.3	13.9	<0.001
2-3 times a month	1.3	1.0	−0.7	3.3	0.218
Never	Ref	Ref	Ref	Ref	·
Severity of pain
Severe	9.5	3.1	3.4	15.6	0.002
Moderate	6.5	2.1	2.3	10.6	0.002
Mild	Ref	Ref	Ref	Ref	·
Restriction of activity due to pain
Severe	20.9	3.8	13.4	28.5	<0.001
Mild to moderate	8.2	2.0	4.3	12.1	<0.001
Never	Ref	Ref	Ref	Ref	·

^∗Multiple linear regression analysis adjusted for sociodemographic variables and presence of any comorbid condition.