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Table 3 Average SF-36 subscale scores and effect sizes for the study groups at first and final follow-up*

From: Magnitude and meaningfulness of change in SF-36 scores in four types of orthopedic surgery

SF-36 scores Total hip replacement (controls) Total hip replacement (patients) Total knee replacement Arthroscopic partial meniscectomy Anterior cruciate ligament reconstruction
   N M (SD) ES N M (SD) ES N M (SD) ES N M (SD) ES N M (SD) ES
PF Baseline 44 79.6 (17.7)   147 30.7 (20.1)   68 30.0 (14.9)   62 59.0 (21.8)   46 44.2 (21.8)  
  First follow-up 44 78.2 (21.8) -0.1 147 60.5 (22.0) 1.5 68 60.6 (21.1) 2.1 62 73.7 (21.9) 0.7 46 79.6 (17.7) 1.6
  Final follow-up 44 74.5 (24.1) -0.3 147 57.6 (27.3) 1.3 68 52.3 (24.1) 1.5     46 83.4 (20.2) 1.8
RP Baseline 42 68.5 (41.0)   139 8.5 (20.2)   64 12.6 (23.7)   62 36.7 (38.3)   46 14.1 (26.7)  
  First follow-up 42 69.6 (42.6) 0.0 139 49 (42.6) 2.0 64 42.7 (42.4) 1.3 62 62.5 (42.2) 0.7 46 64.7 (40.0) 1.9
  Final follow-up 42 60.1 (42.4) -0.2 139 49.6 (43.2) 2.0 64 48.0 (43.9) 1.5     46 80.4 (34.9) 2.5
BP Baseline 50 75.7 (24.2)   154 30.9 (17.2)   66 30.6 (18.8)   62 44.4 (19.2)   46 41.8 (20.4)  
  First follow-up 50 73.0 (27.6) -0.1 154 70.3 (23.6) 2.3 66 70.9 (23.7) 2.1 62 63.3 (24.9) 1.0 46 74.4 (20.7) 1.6
  Final follow-up 50 70.2 (28.0) -0.2 154 67.1 (26.0) 2.1 66 63.9 (25.1) 1.8     46 75.8 (25.3) 1.7
GH Baseline 46 70.2 (20.3)   139 68.8 (19.1)   59 66.0 (18.3)   61 82.4 (15.1)   46 81.5 (15.8)  
  First follow-up 46 68.6 (22.0) -0.1 139 72.5 (20.7) 0.2 59 70.0 (20.9) 0.2 61 80.1 (19.4) -0.2 46 85.0 (15.8) 0.2
  Final follow-up 46 61.8 (22.7) -0.4 139 63.6 (22.9) -0.3 59 62.7 (24.0) -0.2     46 83.4 (17.1) 0.1
VT Baseline 45 69.8 (21.7)   135 50.9 (20.1)   59 50.3 (26.7)   62 60.8 (22.1)   46 59.5 (19.3)  
  First follow-up 45 69.1 (21.6) 0.0 135 70.9 (19.2) 1.0 59 67.3 (24.4) 0.6 62 69.4 (22.3) 0.4 46 71.6 (22.5) 0.6
  Final follow-up 45 63.8 (22.6) -0.3 135 64.3 (22.4) 0.7 59 61.0 (27.7) 0.4     46 72.1 (20.0) 0.7
SF Baseline 49 87.8 (19.7)   157 65.4 (26.2)   66 72.7 (23.0)   62 86.3 (18.6)   46 72.6 (26.0)  
  First follow-up 49 84.9 (18.9) -0.1 157 87.9 (19.5) 0.9 66 86.7 (19.1) 0.6 62 87.5 (22.6) 0.1 46 90.8 (16.1) 0.7
  Final follow-up 49 82.7 (24.0) -0.3 157 84.3 (22.3) 0.7 66 83.5 (25.2) 0.5     46 94.3 (14.6) 0.8
RE Baseline 37 76.1 (34.4)   139 39.3 (43.6)   56 40.5 (43.0)   62 68.8 (38.1)   46 52.9 (43.6)  
  First follow-up 37 76.6 (37.6) 0.0 139 68.1 (39.7) 0.7 56 64.0 (43.1) 0.5 62 77.4 (36.6) 0.2 46 81.9 (36.3) 0.7
  Final follow-up 37 77.5 (40.9) 0.0 139 65.5 (42.0) 0.6 56 57.7 (42.4) 0.4     46 92.0 (20.1) 0.9
MH Baseline 45 86.6 (13.7)   136 69.8 (21.6)   59 71.0 (21.0)   62 78.1 (18.4)   46 71.8 (18.9)  
  First follow-up 45 85.2 (13.9) -0.1 136 83.8 (17.7) 0.6 59 80.0 (19.7) 0.4 62 83.6 (17.6) 0.3 46 84.3 (17.0) 0.7
  Final follow-up 45 82.0 (15.6) -0.3 136 80.6 (17.9) 0.5 59 77.2 (20.1) 0.3     46 86.2 (12.8) 0.8
  1. *Note: First follow-up was three months for APM and six months for THR, TKR, and ACL groups; Final follow-up was five years for THR and TKR groups and two years for ACL.
  2. PF = Physical Functioning, RP = Role Physical, BP = Bodily Pain, GH = General Health, VT = Vitality, SF = Social Functioning, RE = Role Emotional, MH = Mental Health.