Table 4.

Estimation results of the quantile regression for the absolute value of the difference between Demirjian and Willems’ estimated age and chronological age in subjects with JRA

		Demirjian	Willems
Quantile	Variable	Coef. (CI 95%)	Coef. (CI 95%)
tau = 0.25	Sex (male)	− 0.100* (− 0.257; − 0.040)	− 0.064 (− 0.164; 0.060)
	Under treatment (yes)	0.069 (− 0.097; 0.299)	0.136 (− 0.098; 0.313)
	Age	0.004 (− 0.025; 0.018)	0.041* (0.021; 0.060)
	Sex (male)	− 0.276* (− 0.508; − 0.050)	− 0.315* (− 0.383; − 0.054)
tau = 0.50	Under treatment (yes)	0.161 (− 0.073; 0.337)	0.062 (− 0.041; 0.306)
	Age	0.012 (− 0.015; 0.037)	0.065* (0.025; 0.101)
	Sex (male)	− 0.276 (− 0.747; 0.149)	− 0.385 (− 0.518; 0.173)
tau = 0.75	Under treatment (yes)	0.483 (− 0.279; 0.726)	0.068 (− 0.226; 0.261)
	Age	0.025 (− 0.024; 0.125)	0.071* (0.052; 0.140)