{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T17:19:52Z","timestamp":1767633592363,"version":"3.48.0"},"reference-count":33,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T00:00:00Z","timestamp":1767571200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JCM"],"abstract":"<jats:p>Background\/Objectives: In this study, we aimed to validate and psychometrically evaluate a tool for examining sleep disorders in Polish children. Methods: This study involved a randomly selected sample of 348 children aged 6 to 15 years, sourced from preschools, primary schools, and secondary schools in a city with a population exceeding 100,000, in addition to two smaller towns in Poland. Parents were asked to complete the Sleep Disorders Scale for Children (SDSC) in conjunction with a sociodemographic survey. The tool\u2019s reliability was assessed using Cronbach\u2019s alpha (\u03b1), and correlations among various domains were evaluated using Spearman\u2019s rank correlation coefficient (Rs). Results: The study demonstrated excellent internal consistency for the SDSC, with a Cronbach\u2019s \u03b1 value of 0.9. The individual subscales also exhibited acceptable reliability values, ranging from 0.69 to 0.83. Considering T-scores over 70 as indicative of a problem, we identified at least one sleep disorder in 65 participants (18.68%). The most common issues included sleep hyperhidrosis (SHY; 7.47%), disorders of excessive somnolence (DOES; 7.18%), and sleep\u2013wake transition disorders (SWTDs; 5.75%). Students in secondary education were more likely to experience disorders of initiating and maintaining sleep (DIMS), disorders of arousal (DA), and DOES. Conclusions: Based on our findings, the Polish version of the SDSC may be considered a reliable and effective tool for assessing sleep disturbances in school-age children and adolescents.<\/jats:p>","DOI":"10.3390\/jcm15010387","type":"journal-article","created":{"date-parts":[[2026,1,5]],"date-time":"2026-01-05T12:38:56Z","timestamp":1767616736000},"page":"387","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Validation and Psychometric Evaluation of the Polish Language Version of the Sleep Disturbance Scale for Children (SDSC)"],"prefix":"10.3390","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7270-9631","authenticated-orcid":false,"given":"Ma\u0142gorzata","family":"J\u0105czak-Go\u017adziak","sequence":"first","affiliation":[{"name":"Department of Developmental Neurology, Poznan University of Medical Sciences, 61-701 Poznan, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2207-1398","authenticated-orcid":false,"given":"Oliviero","family":"Bruni","sequence":"additional","affiliation":[{"name":"Department of Developmental and Social Psychology, Sapienza University of Rome, 00-185 Rome, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9800-9446","authenticated-orcid":false,"given":"Marcin","family":"\u017barowski","sequence":"additional","affiliation":[{"name":"Department of Developmental Neurology, Poznan University of Medical Sciences, 61-701 Poznan, Poland"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2026,1,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"e70078","DOI":"10.1111\/jsr.70078","article-title":"A Closer Look at Paediatric Sleep: Sleep Health and Sleep Behavioural Disorders in Children and Adolescents","volume":"34","author":"Meneo","year":"2025","journal-title":"J. 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