Table 2

Postoperative changes in physical function scores.

Patient-Reported Outcome Measure	n	Score,Mean ± SD	Change,Mean ± SD	P Value^a
Patient-Reported Outcome Measure	n	Score,Mean ± SD	Change,Mean ± SD	P Value^a	12-Item Veterans RAND PCS
Preoperative	59	32.3 ± 9.1
6 wk	59	33.8 ± 9.8	1.6 ± 9.5	0.210
12 wk	59	37.7 ± 11.2	5.5 ± 8.5	<0.001
6 mo	59	41.3 ± 12.2	9.1 ± 10.6	<0.001
1 y	59	42.2 ± 12.8	9.9 ± 11.1	<0.001
12-Item Short Form PCS
Preoperative	59	30.9 ± 8.0
6 wk	59	31.5 ± 8.8	0.6 ± 8.9	0.594
12 wk	58	35.6 ± 10.4	4.8 ± 8.7	<0.001
6 mo	59	38.5 ± 12.3	7.6 ± 10.6	<0.001
1 y	59	39.9 ± 12.5	9.1 ± 11.1	<0.001
PROMIS-PF
Preoperative	59	34.5 ± 6.1
6 wk	54	35.9 ± 7.2	1.6 ± 7.2	0.115
12 wk	53	40.7 ± 7.5	5.9 ± 7.3	<0.001
6 mo	52	43.3 ± 8.1	8.9 ± 8.5	<0.001
1 y	50	44.7 ± 10.1	9.5 ± 8.6	<0.001

Note: Boldface indicates statistical significance.
aP value calculated using paired t test comparing scores at each timepoint to preoperative values.
PCS, physical component score; PROMIS-PF, patient-reported outcomes measurement information system physical function.