Table 3. Pearson’s correlation coefficients for child- and parent/proxy-reported PedsQL Multidimensional Fatigue Scale total scores, disease activity, and pain.

Variable	Parent/proxy-reported fatigue	Child-reported fatigue
Active joint count	−0.23	−0.12
No. of joints with loss of range of motion	−0.31	−0.29
Physician assessment of disease activity*	−0.25	−0.14
Parent/proxy-reported assessment of arthritis activity*	−0.5	−0.38
Child-reported assessment of arthritis activity*	−0.57	−0.48
Parent/proxy-reported assessment of pain*	−0.64	−0.37
Child-reported pain*	−0.57	−0.55
Childhood Health Assessment Questionnaire	−0.39	−0.36
Erythrocyte sedimentation rate	−0.16	−0.07
Duration of morning stiffness	0	0.06

^*Measured on a 10-point numerical rating scale, where 10 = the most severe level of the variable.