Table 5. Ancova models statistics.

	WOMAC PAIN			WOMAC PHYSICAL FUNCTION
Source	Type III Sum of Squares	F	Sig.	Type III Sum of Squares	F	Sig.
Corrected Model	53995.769a	27.700	<0.001	48931.351a	27.677	<0.001
Intercept	6447.274	29.768	<0.001	4274.415	21.759	<0.001
Medication use	10216.744	47.171	<0.001	2073.871	10.557	<0.001
Disease duration	1893.982	8.745	0.003	10950.318	55.743	0.001
Phenotype	25373.689	16.736	<0.001	20178.351	14.674	<0.001
Error	127353.416			115507.483
Total	317856.250			281992.661
Corrected Total	181349.185			164438.834

a: R Squared = .298 (Adjusted R Squared = .290)

b: R Squared = .298 (Adjusted R Squared = .287)

df: degree of freedom