Table 3

Absolute (SEM, MDC90 and MDC95) test–retest reliability estimates for the self-reported questionnaires over a short-time interval (1–2 weeks)

Questionnaire subscaleSEM(95% CI)MDC90 ind(95% CI)MDC95 ind(95% CI)MDC90 Gp(95% CI)MDC95 Gp(95% CI)
mHHS (n=30)7.6(5.2 to 11.0)17.8(12.1 to 25.7)21.2(14.3 to 30.6)3.3(2.2 to 4.7)3.9(2.6 to 5.6)
NHS (n=30)4.5(3.2 to 6.8)10.4(7.4 to 16.0)12.4(8.8 to 19.0)1.9(1.3 to 2.9)2.3(1.6 to 3.5)
HOOS (n=30)
 Pain5.0(3.2 to 7.1)11.7(7.4 to 16.6)14.0(8.8 to 19.7)2.1(1.4 to 3.0)2.5(1.6 to 3.6)
 Symptom6.2(4.4 to 8.8)14.6(10.3 to 20.6)17.3(12.2 to 24.4)2.7(1.9 to 3.8)3.2(2.2 to 4.5)
 ADL4.4(3.1 to 7.7)10.4(7.3 to 17.9)12.3(8.7 to 21.3)1.9(1.3 to 3.3)2.2(1.6 to 3.9)
 Sport/Rec10.6(7.0 to 15.3)24.8(16.4 to 35.6)29.4(19.5 to 42.3)4.5(3.0 to 6.5)5.4(3.6 to 7.7)
 Quality of life5.9(4.2 to 8.3)13.8(9.7 to 19.5)16.4(11.6 to 23.1)2.5(1.8 to 3.6)3.0(2.1 to 4.2)
iHOT-33 (n=30)
 Symptoms6.4(4.6 to 9.4)15.0(10.6 to 21.9)17.8(12.6 to 26.0)2.7(1.9 to 4.0)3.3(2.3 to 4.7)
 Sports (n=28)8.1(5.3 to 11.9)19.0(12.4 to 27.8)22.5(14.7 to 33.0)3.6(2.3 to 5.2)4.3(2.8 to 6.2)
 Job related (n=26)9.0(5.2 to 14.0)20.9(12.1 to 32.8)24.9(14.4 to 38.9)4.1(2.4 to 6.4)4.9(2.8 to 7.6)
 Social7.1(4.7 to 10.6)16.5(11.0 to 24.6)19.6(13.1 to 29.2)3.0(2.0 to 4.5)3.6(2.4 to 5.3)
 Total5.6(3.7 to 8.3)13.2(8.6 to 19.3)15.6(10.2 to 22.9)2.4(1.6 to 3.5)2.9(1.9 to 4.2)
HOS (n=30)
 ADL score6.4(3.9 to 11.1)15.0(9.0 to 25.9)17.8(10.7 to 30.8)2.7(1.6 to 4.7)3.2(2.0 to 5.6)
 Sport score10.4(6.9 to 15.3)24.3(16.2 to 35.8)28.9(19.2 to 42.5)4.4(3.0 to 6.5)5.3(3.5 to 7.8)
 Current ADL function (n=24)12.9(8.6 to 19.5)30.0(20.0 to 45.5)35.6(23.8 to 54.0)6.1(4.1 to 9.3)7.3(4.8 to 11.0)
 Current sport function (n=25)8.4(6.0 to 12.8)19.7(13.9 to 29.9)23.4(16.6 to 35.5)3.9(2.8 to 6.0)4.7(3.3 to 7.1)
HAGOS (n=23)
 Pain5.5(3.2 to 9.3)12.9(7.4 to 12.9)15.3(8.8 to 25.8)2.7(1.6 to 4.5)3.2(1.8 to 5.4)
 Symptom5.8(3.8 to 8.8)13.4(9.0 to 13.4)16.0(10.6 to 24.4)2.8(1.9 to 4.3)3.3(2.2 to 5.1)
 ADL7.7(4.8 to 11.9)17.9(11.3 to 17.9)21.3(13.5 to 33.0)3.7(2.4 to 5.8)4.4(2.8 to 6.9)
 Sport/Rec7.9(5.3 to 12.3)18.4(12.4 to 18.4)21.9(14.7 to 33.6)3.8(2.6 to 5.9)4.6(3.1 to 7.0)
 Physical activity (n=22)8.0(5.3 to 12.6)18.8(12.3 to 18.8)22.3(14.6 to 35.0)4.0(2.6 to 6.3)4.7(3.1 to 7.5)
 Quality of life6.5(4.5 to 10.115.3(10.4 to 15.3)18.1(12.4 to 28.1)3.2(2.2 to 4.9)3.8(2.6 to 5.9)
  • ADL, activities of daily living; ICC, Intraclass correlation coefficient; HAGOS, Copenhagen Hip and Groin Outcome Score; HOS, Hip Outcome Score; HOOS, Hip dysfunction and Osteoarthritis Outcome Score; iHOT-33, The International Hip Outcome Tool; MDC90/95 ind, minimal detectable change at 90%/95% confidence at individual level; MDC90/95 Gp, minimal detectable change at 90%/95% confidence at the group level; mHHS, modified-Harris hip Score; NHS, Non-arthritic Hip Score; SEM, SE of measurement.