. Author manuscript; available in PMC: 2013 Jul 1.

Published in final edited form as: Arthritis Rheum. 2012 Jul;64(7):2252–2259. doi: 10.1002/art.34422

Table 2.

Proportional odds of pain in those with v. without definite varus thrust, using the individual WOMAC pain questions to define pain.

Individual WOMAC pain questions			Frequency of people with levels of pain stratified by varus thrust status					Unadjusted Proportional Odds Ratio for Pain with v. without definite varus thrust	^*Adjusted Proportional Odds Ratio for Pain with v. without definite varus thrust
Individual WOMAC pain questions			0	1	2	3	4
Weight-bearing Questions	Pain with walking	*With definite varus thrust*	4	12	6	3	0	5.0 (1.9 – 12.8)	N/A^ξ
	Pain with walking	*Without definite varus thrust*	29	21	7	0	0	5.0 (1.9 – 12.8)	N/A^ξ
	Pain standing upright	*With definite varus thrust*	4	8	9	4	0	5.5 (2.2 – 13.9)	4.1 (1.5 – 11.6)
	Pain standing upright	*Without definite varus thrust*	31	16	8	2	0	5.5 (2.2 – 13.9)	4.1 (1.5 – 11.6)
	Pain with stairs	*With definite varus thrust*	2	11	4	7	1	N/A^ξ	1.0 (0.4 – 3.0)
	Pain with stairs	*Without definite varus thrust*	11	21	20	4	1	N/A^ξ	1.0 (0.4 – 3.0)

Non-weight-bearing Questions	Pain at night in bed	*With definite varus thrust*	11	6	7	1	0	2.0 (0.8 – 4.9)	2.3 (0.8 – 6.8)
	Pain at night in bed	*Without definite varus thrust*	35	12	8	1	1	2.0 (0.8 – 4.9)	2.3 (0.8 – 6.8)
	Pain sitting or lying	*With definite varus thrust*	11	10	3	1	0	1.5 (0.5 – 3.8)	1.3 (0.4 – 3.7)
	Pain sitting or lying	*Without definite varus thrust*	34	13	8	1	1	1.5 (0.5 – 3.8)	1.3 (0.4 – 3.7)

Denotes adjustment for age, sex, height and weight.

^ξ

Using this definition of pain, the assumptions of proportional odds was not met; therefore, we did not report the proportional odds using this definition of pain.