The reliability and validity of the persian version of sinonasal outcome test 22 (snot 22) questionnaires.

Background: The quality of life (QOL) is an important indicator for disease-severity classification and outcome measurement in obtaining treatment sinonasal diseases. The sinonasal outcome test 22 (SNOT 22) questionnaire has been introduced as the best specific sinonasal instrument for QOL measurement.

Objectives: To prepare a valid and reliable Persian language version of SNOT 22 questionnaire.

High Prevalence of Sleep Problems in School- and Preschool-aged Children in Tehran: a Population Based Study.

Objective: Sleep problems are experienced by 25-30 percent of children and adolescents, regardless of age. The purpose of this study was to investigate if there is any relationship between gender or school entrance and sleep complaints.

Methods: From June 2008 to May 2009 children aged 2 to 12 years were selected by clustered randomization of families.