Table 2.

Univariate regression coefficients of baseline variables with Z-scores of bone age ^a

Baseline variable	Estimated β	95% CI	P -value
Age	0.024	−0.116 to 0.164	0.736
Male gender	−0.190	−0.921 to 0.541	0.605
Disease duration	−0.030	−0.184 to 0.1234	0.694
CHAQ	−0.021	−0.577 to 0.534	0.940
JADAS-10	0.008	−0.065 to 0.081	0.830
Ever use of systemic glucocorticoids	−0.790	−1.492 to −0.088	0.028

^aCHAQ, Child Health Assessment Questionnaire; JADAS, Juvenile Arthritis Disease Activity Score; Z-score, Standard deviation score compared with healthy population.