关键词: 睡眠, 问卷调查, 项目反应理论, Logistic模型

Abstract: Objective　To evaluate the application of Pediatric Sleep Questionnaire （PSQ） by item analysis using item response theory.Methods　Data were obtained from the survey of children at the age of 3-14 years from 7 districts in Beijing from May to July 2015.By using multi-stage stratified cluster random sampling method，a total of 11 420 children from 25 kindergartens，primary and middle schools were selected in 7 districts （Xicheng，Chaoyang，Changping，Shunyi，Fangshan，Huairou and Mentougou）．All the parents of children were recruited to complete the PSQ，which consists of four dimensions related to sleep disordered breathing in children：breathing，sleep，behavior and others.The item response theory with two-parameter Logistic model was used to conduct item analysis to calculate the discrimination and difficulty of every item and draw item characteristics curve.Results　The analysis of two-parameter Logistic model showed that most of the items had a good discrimination，but the items of “Does your child occasionally wet the bed” and “Is your child overweight” had a significant lower discrimination parameter（0.441 and 0.124，respectively） and a higher difficulty parameter （4.378 and 6.172，respectively）．The test information function showed almost the same curves of the questionnaire with or without the two items.Conclusion　A simplified version of PSQ is recommended in Chinese children，although a good evaluation effect in the screening of children's sleep disorder is found.

Key words: Sleep, Questionnaires, Item response theory, Logistic models