Table 5.

Subgroup analysis of disability

Independent variables	DF (R-square)	F value	P value
WOMEN
Age	1 (0.06)	5.03	0.0279
Pre-operative WORC	1 (0.17)	15.36	0.0002
Post-op pain limited ROM	1 (0.62)	117.60	< 0.0001
Post-op strength	1 (0.30)	30.72	< 0.0001
Post-op participation limitation	2 (0.56)	46.44	< 0.0001
Pre-op expectations for return to work	3 (0.03)	0.76	0.5184
Work Status	1 (0.16)	14.15	0.0003
Level of pathology	1 (0.04)	3.00	0.0872
Pre-op Medication use	1 (0.003)	0.20	0.6527
MEN
Age	1 (0.04)	3.54	0.0637
Pre-operative WORC	1 (0.03)	2.70	0.1045
Post-op pain limited ROM	1 (0.25)	25.89	< 0.0001
Post-op strength	1 (0.20)	19.01	< 0.0001
Post-op participation limitation	2 (0.41)	26.71	< 0.0001
Pre-op expectations for return to work	3 (0.20)	6.29	0.0007
Work Status	1 (0.11)	9.92	0.0023
Level of pathology	1 (0.01)	1.58	0.2122
Pre-op Medication use	1 (0.08)	7.36	0.0081