Skip to main content

Table 4 Agreement between observed and predicted scores on the HAQ-DI and PF-10 in the cross-validation sample (n = 532)

From: Development and evaluation of a crosswalk between the SF-36 physical functioning scale and Health Assessment Questionnaire disability index in rheumatoid arthritis

 

ICC (95% CI)

Mean (SD)

Mean (SD)

Mean (SD)

LOA

observed scores

predicted scores

difference

HAQ-SDI

0.78 (0.74 to 0.81)

0.65 (0.64)

0.72 (0.71)

−0.07 (0.44)

−0.93 to 0.80

HAQ-ADI

0.77 (0.72 to 0.80)

0.53 (0.57)

0.63 (0.65)

−0.10 (0.40)

−0.88 to 0.68

PF-10 (predicted from HAQ-SDI)

0.79 (0.75 to 0.82)

67.39 (25.71)

69.60 (23.26)

−2.21 (15.80)

−33.18 to 28.76

PF-10 (predicted from HAQ-ADI)

0.79 (0.76 to 0.82)

67.39 (25.71)

69.62 (23.01)

−2.23 (15.64)

−32.88 to 28.42

  1. HAQ-DI = Health Assessment Questionnaire Disability Index; PF-10 = SF-36 physical functioning scale; ICC = intraclass correlation coefficient; LOA = Bland-Altman limits of agreement (mean difference ± 1.96×SD of the difference).