. 2013 Dec;4(4):117–126. doi: 10.1177/2151458514520634

Table 2.

Associations Between Preoperative Patient Factors and Postoperative WOMAC Scores.

	Postop WOMAC Total	Postop WOMAC Disability	Postop WOMAC Pain	Changes in WOMAC Total^a	Change in WOMAC Disability^a
Preop WOMAC total
Pearson	.198^b	.197^b	.165^b	.749^b	.733^b
P value	.009	.009	.030	<.001	<.001
Preop WOMAC disability
Pearson	.196^b	.197^b	.152^b	.738^b	.746^b
P value	.010	.009	.045	<.001	<.001
Preop WOMAC pain
Pearson	.195^b	.189^b	.192^b	.634^b	.559^b
P value	.010	.013	.011	<.001	<.001
Preop age
Pearson	.051	.043	.044	−.103	−.096
P value	.505	.573	.565	.175	.207
Preop BMI
Pearson	.122	.128	.056	.080	.089
P value	.110	.092	.464	.294	.245

Abbreviations: BMI, body mass index; preop; preoperative; postop; postoperative; WOMAC, Western Ontario and McMaster Universities Arthritis Index.

^a Change in WOMAC total or WOMAC disability is presented as a decrease in WOMAC score, that is, a positive change would represent an overall decrease in score. ^b p < 0.05