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. Author manuscript; available in PMC: 2013 Jul 1.
Published in final edited form as: PM R. 2012 May 16;4(7):479–487. doi: 10.1016/j.pmrj.2012.03.012

Table 7.

One-year outcomes between surgical and nonsurgical groups

Outcome Measure Baseline 12 Mo P Value
Within Groups* 		P Value
Between Groups†
Numeric Pain Scale (0–10)
   Surgical group 5.6 ± 3 2.8 ± 3   .0002‡
   Nonsurgical group 6 ± 3 3.3 ± 3   .0001‡ .67‡
Harris Hip score
   Surgical group 61.3 ± 13 81.1 ± 17 <.0001
   Nonsurgical group 69.4 ± 11 78.9 ± 14   .006 .45
WOMAC
   Surgical group 29.2 ± 16 15.3 ± 16   .008
   Nonsurgical group 25.1 ± 17 13.5 ± 14   .001 .91
Baecke questionnaire
   Surgical group 8.5 ± 1 7.9 ± 1   .006
   Nonsurgical group 7.4 ± 1 6.9 ± 1   .002 .48
SF-12 PCS
   Surgical group 39.7 ± 7 48.0 ± 9   .0001
   Nonsurgical group 42.7 ± 9 47.6 ± 9   .08 .53
SF-12 MCS
   Surgical group 40.8 ± 8 48.1 ± 10   .003
   Nonsurgical group 38.3 ± 8 45.1 ± 8   .03 .42
Nonarthritic hip score
   Surgical group 63.2 ± 14 76.7 ± 19   .005
   Non-surgical group 70.4 ± 12 81.6 ± 12   .0006 .77

WOMAC = Western Ontario and McMaster Universities Osteoarthritis Index; SF-12 PCS = physical composite subscore; SF-12 MCS = mental health composite subscore.

*

Within groups P value by paired t-test.

†

Between groups P value by analysis of covariance.

‡

Data rank-transformed prior to analysis.