Regional and seasonal variation in the incidence o

Authors: Abbas Basiri Nasser Shakhssalim Ali Reza Khoshdel Mohsen Naghavi

Publish Date: 2009/05/26

Volume: 37, Issue: 4, Pages: 197-204

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Abstract

The objective of the study is to measure the incidence rate of urolithiasis in a nationwide populationbased study by a new methodology A multistage stratified “epsem scheme” sampling was designed among imaging centres in 12 ecologic regions composed of 30 provinces while the regions were assumed as independent epidemiologic units Four temporal phases were determined for sampling to represent four seasons Imagingproven positive cases for urinary stones were included and questionnaire filled out by interview 2955 new cases of urinary stone were included and the overall pooled yearly incidence rate was 136/100000 95 CI 103–168 The whole positive group had a mean age of 415 years SD = 163 years and composed of 579 male The most common season for presentation of disease was autumn Geographically the west and north of Iran and seasonally autumn have shown the highest incidence rates for the urinary tract stones To establish the real burden of urinary stone disease our study adds a little piece of information to the worldwide epidemiology of urolithiasisWe thank those members of the Ministry of Health and medical university teams who made this study possible and in particular Dr Nahid Jafari We would also like to thank those imaging centers that provided access to their cases The authors would like to express their utmost gratitude to all of the participating physicians and the staff of the involved medical centres for supporting the local data collection

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