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Table 2 SF-12 Mental Component Scores at Baseline, 1 year after Total Hip Arthroplasty, and 1-Year Change by quartiles of WOMAC pain and function improvement

From: Improvement in mental health following total hip arthroplasty: the role of pain and function

  N SF-12 MCS
Prior to THA
Mean (SD)
SF-12 MCS
1 year after THA
Mean (SD)
SF-12 MCS
1-Year Change
Mean (SD)
Improvement WOMAC pain in quartiles     
 <30 182 44.2 (11.1) 45.1 (10.8) 0.8 (10.2)
 30–44.9 128 46.8 (10.7) 49.1 (9.9) 2.2 (10.5)
 45–59.9 163 46.4 (10.3) 49.4 (9.6) 3.0 (10.7)
 ≥60 128 41.4 (12.5) 46.8 (11.2) 5.5 (11.5)
 Total 601 44.7 (11.3) 47.5 (10.5) 2.8 (10.8)
p-value for linearity (ANOVA)     <0.001
Improvement WOMAC function in quartiles     
 <21 128 42.3 (10.7) 42.8 (11.0) 0.5 (10.4)
 21–38.9 155 46.2 (11.5) 47.6 (10.4) 1.4 (9.3)
 39–53.9 157 46.4 (10.8) 49.4 (9.1) 3.0 (11.4)
 ≥54 145 43.5 (11.4) 49.1 (10.5) 5.7 (11.0)
 Total 585 44.7 (11.2) 47.4 (10.5) 2.7 (10.7)
p-value for linearity (ANOVA)     <0.001