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Table 4 Floor and ceiling effects for SF-36 subscale scores 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
   % scoring 0 % scoring 100 % scoring 0 % scoring 100 % scoring 0 % scoring 100 % scoring 0 % scoring 100 % scoring 0 % scoring 100
PF Baseline - 12.0 8.3 - 1.4 - 1.6 0.0 2.2 -
  First follow-up - 13.6 1.3 0.7 - 1.4 - 6.3 - 4.3
  Final follow-up 2.2 8.7 3.9 - 2.7 -    - 28.3
RP Baseline 19.6 54.3 80.8 2.0 70.4 2.8 39.7 19.0 76.1 -
  First follow-up 21.4 61.9 35.3 31.7 40.8 26.8 20.6 50.8 19.6 45.7
  Final follow-up 26.2 42.9 35.3 35.3 38.0 19.4    10.9 71.7
BP Baseline - 40.0 9.0 1.3 8.3 1.4 - 1.6 - 2.2
  First follow-up - 36.0 0.6 27.1 - 26.4 - 12.7 - 21.7
  Final follow-up 2.0 38.0 0.6 25.8 - 19.4    2.2 41.3
GH Baseline - 8.7 - 4.3 - 1.5 - 16.1 - 8.7
  First follow-up - 13.0 0.7 5.7 - 8.8 - 27.4 - 13.0
  Final follow-up - 6.5 1.4 4.3 - 8.8    - 21.7
VT Baseline - 4.4 2.2 0.7 3.0 4.5 - 3.2 - -
  First follow-up - 11.1 0.7 5.1 - 7.6 - 7.9 - 13.0
  Final follow-up 2.2 4.4 0.7 4.4 3.0 4.5    - 6.5
SF Baseline - 64.0 3.2 17.7 - 22.5 - 52.4 2.2 32.6
  First follow-up - 53.1 0.6 60.8 - 57.7 - 68.3 - 67.4
  Final follow-up 2.0 52.0 1.9 55.7 2.8 53.5    - 84.8
RE Baseline 10.8 59.5 47.5 30.2 46.9 28.1 14.3 54.0 30.4 41.3
  First follow-up 13.5 67.6 17.3 55.4 28.1 53.1 12.7 68.3 15.2 76.1
  Final follow-up 18.9 75.7 23.0 54.0 26.6 43.8    - 84.8
MH Baseline - 20.0 - 6.6 - 12.1 - 9.5 - -
  First follow-up - 15.6 0.7 24.1 - 21.2 - 22.2 - 21.7
  Final follow-up - 13.3 - 19.0 - 16.7    - 15.2
  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.
  3. Values indicating floor (15% or more with a score of 0) and ceiling (15% or more with a score of 100) effects are bolded.