Table 2

Baseline and retest means (SD) and relative test–retest reliability estimates (ICC) for the self-reported questionnaires over a 1-week to 2-week interval

Questionnaire subscaleBaselineRetestTest–retest 
Mean(SD)Mean(SD)Mean(SD)ICC(95% CI)
mHHS (n=30)73.2(17.2)73.7(14.0)−0.5(13.9)0.76(0.50 to 0.89)
NHS (n=30)73.8(18.4)71.3(18.1)2.4(8.9)0.94(0.86 to 0.97)
HOOS (n=30)
 Pain71.8(21.3)69.0(23.8)2.8(9.8)0.95(0.90 to 0.98)
 Symptom61.7(18.5)63.2(20.9)−1.5(11.9)0.90(0.80 to 0.95)
 ADL81.4(22.1)77.1(22.3)4.3(8.4)0.96(0.88 to 0.98)
 Sport/Rec58.6(24.7)54.0(28.4)4.6(19.6)0.84(0.67 to 0.93)
 Quality of life36.4(20.3)37.4(21.4)−1.4(11.3)0.92(0.84 to 0.96)
iHOT-33 (n=30)
 Symptoms60.9(22.3)59.6(23.2)1.3(12.6)0.92(0.83 to 0.96)
 Sports (n=28)29.3(23.0)28.4(20.5)0.9(14.5)0.86(0.70 to 0.94)
 Job related (n=26)60.1(30.7)52.7(29.1)8.2(14.9)0.91(0.78 to 0.97)
 Social45.9(24.2)41.9(23.0)4.0(12.7)0.91(0.80 to 0.96)
 Total51.8(21.5)49.8(21.2)2.1(11.2)0.93(0.85 to 0.97)
HOS (n=30)
 ADL score79.5(17.0)72.5(21.7)7.0(10.5)0.89(0.67 to 0.96)
 Sport score58.7(21.3)50.9(27.8)7.8(18.4)0.82(0.61 to 0.92)
 Current ADL function (n=24)71.6(22.4)62.0(27.1)9.5(22.1)0.73(0.38 to 0.88)
 Current sport function (n=25)46.0(26.0)44.0(27.5)2.0(16.2)0.90(0.77 to 0.95)
HAGOS (n=23)
 Pain66.7(19.5)61.5(25.6)5.2(9.6)0.94(0.83 to 0.98)
 Symptom52.6(18.2)52.5(20.2)0.2(11.1)0.91(0.79 to 0.96)
 ADL76.1(22.6)70.9(26.0)5.2(14.1)0.90(0.76 to 0.96)
 Sport/Rec46.2(21.7)44.7(25.9)1.5(15.4)0.89(0.74 to 0.95)
 Physical activity (n=22)15.9(20.5)14.2(14.6)1.6(14.7)0.79(0.48 to 0.91)
 Quality of life34.8(16.7)33.0(17.1)1.7(12.5)0.85(0.64 to 0.93)
  • 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; mHHS, modified Harris hip Score; NHS, Non-arthritic Hip Score.