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Table 2 Mean percentage change in strength of 21 subjects randomized to a postoperative exercise intervention or usual care following primary total hip arthroplasty

From: A randomized pilot study of a comprehensive postoperative exercise program compared with usual care following primary total hip arthroplasty in subjects less than 65 years of age: feasibility, selection of outcome measures and timing of assessment

  Mean% change from preop to 6 weeks (Pre-intervention) Mean% change from 6 weeks (Pre-intervention) to 4 months (Post-intervention) Mean% change from 4-months to 12-months postoperative  
Post-intervention
  Intervention Control Intervention Control Intervention Control P-value for group effect*
(n = 11) (n = 10) (n = 11) (n = 10) (n = 11) (n = 10)
Performance-based measures        
 Hip flexion (SD) −24.2 (31.7) −7.7 (40.0) 73.8 (50.1) 39.8 (64.1) −2.5 (11.8) 5.3 (19.1) 0.69
 Hip extension (SD) −13.2.9 (27.7) −7.5 (52.3) 50.5 (26.1) 30.5 (67.3) 3.1 (30.2) 12.2 (26.8) 0.78
 Hip External rotation (SD) −52.2 (14.3) −34.7 (36.4) 54.2 (33.2) 9.4 (21.6) 3.9 (26.3) 34.0 (24.2) 0.89
 Hip internal rotation (SD) −24.6 (46.9) −33.6 (34.1) 46.7 (83.2) 35.7 (28.0) 14.2 (48.0) −0.1 (22.4) 0.14
 Abduction (SD) - - 37.8 (62.9) 6.2 (48.1) 13.0 (20.1) 16.5 (48.1) 0.25
  1. Legend: SD = Standard Deviation.
  2. *Analyzed using a 2-way Repeated Measures ANOVA.