Table 4.

Mean SF-36 Scores per Group

	Group 1	Group 2	Group 3	Group 4	P value
Physical functioning	59.3a	74.1a	82.7	92.5	<0.001
Physical role functioning	26.2a	62.4a	75.0	86.3	<0.001
Emotional role functioning	49.6a	77.6	92.3	89.5	<0.001
Vitality	37.7a	59.1a	61.9	72.7	<0.001
Mental health	56.4a	73.9a	75.7	81.4	<0.001
Social functioning	43.9a	75.3a	84.7	90.0	<0.001
Pain	45.8a	66.0a	74.8	81.0	<0.001
General health	34.1a	58.3a	65.6	74.6	<0.001

^aMean difference is statistically significant compared with healthy controls.