Table 1.

Design of our multicenter study evaluating the association between endogenous, exogenous, and genetic factors and vitamin D deficiency among children and adolescents with JIA.

Groups	Clinical indicators, endogenous/exogenous factors	Genetic factors
Healthy (n = 277) JIA (n = 150)	Age Sex Anthropometric indicators: Height (cm), Body weight (kg), BMI (kg/m2) Evaluation of vitamin D coming from diet Evaluation of the preventive dose of vitamin D Clinical manifestations Process activity Therapy Season of the year Region of residence	VDR:    FokI (rs2228570, NM_000376.2:c.2T>C)    TaqI (rs731236, NM_000376.2: c.1056T>C)    BsmI (rs1544410, NM_000376.2: c.1024+283G>A)

BMI, body mass index; JIA, juvenile idiopathic arthritis.