Table 3.

Coefficients for ANCOVA with MEP as Outcome (Adjusted Models)

	Balance Pain			Walking Pain			Chair Stand Pain
Predictor	SS	F	p	SS	F	p	SS	F	p
Perceived stress	494.55	1.37	0.24	1521.38	3.59	0.06	740.99	1.69	0.20
Race	551.98	1.53	0.22	909.06	2.15	0.15	862.2	1.97	0.16
Perceived stress*race	2747.19	7.60	0.006	3264.68	7.71	0.006	3236.27	7.40	0.007
C1 SES index	725.46	2.01	0.158	36.94	0.09	0.77	57.57	0.13	0.71
C2 Age	173.89	0.48	0.49	228.52	0.54	0.46	442.66	1.01	0.32
C3 KL score	451.35	1.25	0.27	1707.77	4.03	0.05	3922.67	8.97	0.003
C4 BMI	70.06	0.19	0.66	432.84	1.02	0.31	1131.92	2.59	0.11
C5 Study site	360.04	1	0.32	1306.72	3.09	0.08	13.95	0.03	0.86
C6 WOMAC	13888.37	38.42	<.0001	17837	42.13	<.0001	18922.74	43.27	<.0001

	Index Knee Strength Pain			Non-Index Knee Strength Pain
Predictor	SS	F	p	SS	F	p
Perceived stress	9.71	0.02	0.88	1137.53	3.52	0.06
Race	139.84	0.32	0.58	48.42	0.15	0.7
Perceived stress*race	1374.23	3.1	0.08	353.64	1.09	0.3
C1 SES index	441.87	1	0.32	26.21	0.08	0.78
C2 Age	59.4	0.13	0.71	514.38	1.59	0.21
C3 KL score	47.25	0.11	0.74	258.59	0.8	0.37
C4 BMI	664.48	1.5	0.22	211.21	0.65	0.42
C5 Study site	1996.7	4.51	0.04	379.41	1.17	0.28
C6 WOMAC	10239.43	23.12	<.01	8095.38	25.02	<.01

SES= socioeconomic status, BMI= body mass index, WOMAC= Western Ontario and McMaster Universities Osteoarthritis Index