Table 4

 Ordered logistic regression models for the RAND 36 item health survey physical health and mental health component summary scales in 122 young adults with juvenile idiopathic arthritis

Explanatory variablePredictors of physical health and mental health summary scales
UnivariateMultivariate*
Physical health OR (95% CI†)Mental health OR (95% CI†)Physical health OR (95% CI†)Mental health OR (95% CI†)
Dependent variables are divided into quartiles.
*Forward selection. Only those variables shown which entered the model.
†95% confidence interval calculated using robust standard error.
CI, confidence interval; OR, odds ratio; VAS, visual analogue scale.
Sex (female)0.57 (0.28 to 1.16)0.54 (0.25 to 1.15)
Age at follow up (years)0.85 (0.70 to 1.06)0.82 (0.66 to 1.02)
Educational years
    9ReferenceReference
    9–123.12 (1.10 to 8.87)1.87 (0.43 to 8.12)
    >122.79 (0.92 to 8.51)2.32 (0.47 to 11.45)
Marriage or common law marriage1.25 (0.65 to 2.41)1.95 (1.00 to 3.79)
Age at onset (years)1.04 (0.96 to 1.23)1.02 (0.94 to 1.10)
Diagnosis
    OligoarthritisReferenceReference
    Extended oligoarthritis0.17 (0.06 to 0.46)0.22 (0.07 to 0.72)
    Polyarthritis0.76 (0.33 to 1.77)0.65 (0.27 to 1.56)
    Other arthritis0.76 (0.08 to 7.11)3.67 (0.47 to >20)
Remission at follow up3.70 (1.86 to 7.35)1.10 (0.57 to 2.11)2.23 (1.09 to 4.56)
Pain, less than 20 mm in VAS17.26 (4.86 to >20)2.19 (0.89 to 5.41)
Patient’s global assessment, less than 20 mm in VAS25.23 (5.94 to >20)3.45 (1.52 to 7.83)19.02 (4.36 to >20)3.45 (1.52 to 7.83)
Physician’s global assessment, less than 20 mm in VAS5.19 (1.81 to 14.88)2.39 (0.91 to 6.30)