We determined the idiopathic hypercalciuria(IH)in 1410 children living in Qingdao District by measuring their urine Ca/Cr ratio 2h after breakfast and making quantitative analysis of calcium excretions within 24 hours after breakfast.

• 对青岛市1410名健康儿童随意早餐后2h尿钙/肌酐（Ca/Cr）比值和24h尿钙定量进行测定。