Prevalence and Symptoms of Idiopathic Hypercalciuria in Primary School students in Sanandaj

Determination of prevalence rate of idiopathic hypercalciuria(IH) in primary school students in Sanandaj. This was a descriptive-analytic study and included 506 primary school students. First we measured the ratio of urine calcium to urine creatinine (UCa/UCr) as screening test then 24 hour urine calcium of the patients who had UCa/UCr ratio more than 0.2 mg/mg (31patients) was measured. Those with 24 hours urine calcium of more than 4 mg/kg were regarded hypercalciuric, (3 boys and 12 girls). Data were introduced into SPSS win soft ware, represented in the form of frequency distribution table and analyzed by means of X2 and T-tests. 248 patients were female and 258 were male. 32 patients (6.32%), 11 boys and 21 girls had UCa/UCr ratio more than 0.2 mg/mg, but 15 patients (3 boys and 12 girls) had excretion of more than 4mg/kg/day calcium in urine which encompassed 3% of the students (1.2% boys, 4.8% girls). The results of this study indicated the Incidence of hypercalciuria among student girls was more than that of boys. 95th percentile for urine Ca/Cr is 0.198 for boys and 0.253 for girls. Considering the effect of hypercalciuria on bone density and growth which has more importance in girls, it is recommended to evaluate such effect in a more comprehensive study.