{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T11:38:52Z","timestamp":1761824332506,"version":"3.37.3"},"reference-count":30,"publisher":"FapUNIFESP (SciELO)","issue":"3","license":[{"start":{"date-parts":[[2021,3,1]],"date-time":"2021-03-01T00:00:00Z","timestamp":1614556800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2021,3,1]],"date-time":"2021-03-01T00:00:00Z","timestamp":1614556800000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2021,3,1]],"date-time":"2021-03-01T00:00:00Z","timestamp":1614556800000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Ci\u00eanc. sa\u00fade coletiva"],"abstract":"<jats:p>Abstract This study analyzed the validity and reliability of an instrument with scales measuring factors associated with screen time in adolescents. Two cross-sectional studies included students for analyses of validity and internal consistency (n=1138, 51.5% boys) and test-retest reproducibility (n=194, 56.2% boys). Individual (attitude, self-efficacy and expectations), social (behaviors, rules, beliefs and family support and support of school members) and physical environmental (home and bedroom equipment) factors of screen time were evaluated. All the scales of the instrument met the statistical criteria of the validity of the exploratory factorial analysis (p&lt;0.001). The exploratory factorial analysis indicated five one-dimensional and three two-factor scales (self-efficacy, expectations and familiar behavior), with factorial loads of 0.56 to 0.88. There were significant correlations between the scores of almost all the scales and the reported screen time (p&lt;0.05). Eight of nine scales\/subscales showed Cronbach\u2019s \u03b1 value being higher than 0.70, and ICC ranged from 0.63 to 0.83. In conclusion, the instrument presented scales with acceptable validity and reliability and can be used to measure factors associated with screen time in Brazilian students.<\/jats:p>","DOI":"10.1590\/1413-81232021263.31322018","type":"journal-article","created":{"date-parts":[[2021,3,12]],"date-time":"2021-03-12T18:50:44Z","timestamp":1615575044000},"page":"1047-1061","source":"Crossref","is-referenced-by-count":1,"title":["Validity and reliability of an instrument to measure factors associated with screen time in Brazilian students"],"prefix":"10.1590","volume":"26","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4769-4068","authenticated-orcid":false,"given":"Valter Cordeiro","family":"Barbosa Filho","sequence":"first","affiliation":[{"name":"Instituto Federal de Educa\u00e7\u00e3o, Ci\u00eancia e Tecnologia do Cear\u00e1,  Brazil; Universidade Federal de Santa Catarina,  Brazil; Universidade Estadual do Cear\u00e1,  Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8922-1042","authenticated-orcid":false,"given":"Alexsandra Silva","family":"Bandeira","sequence":"additional","affiliation":[{"name":"Universidade Federal de Santa Catarina,  Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9647-3448","authenticated-orcid":false,"given":"Cassiano Ricardo","family":"Rech","sequence":"additional","affiliation":[{"name":"Universidade Federal de Santa Catarina,  Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2278-9076","authenticated-orcid":false,"given":"Adair Silva","family":"Lopes","sequence":"additional","affiliation":[{"name":"Universidade Federal de Santa Catarina,  Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7571-9181","authenticated-orcid":false,"given":"Jorge","family":"Mota","sequence":"additional","affiliation":[{"name":"Universidade do Porto,  Portugual"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7356-1680","authenticated-orcid":false,"given":"Kelly Samara","family":"Silva","sequence":"additional","affiliation":[{"name":"Universidade Federal de Santa Catarina,  Brazil"}]}],"member":"530","published-online":{"date-parts":[[2021,3]]},"reference":[{"year":"2017","series-title":"Promo\u00e7\u00e3o da Atividade F\u00edsica na Inf\u00e2ncia e Adolesc\u00eancia","key":"ref1"},{"key":"ref2","doi-asserted-by":"crossref","first-page":"83","DOI":"10.1186\/s12966-016-0409-3","article-title":"The SOS-framework (Systems of Sedentary behaviours): an international transdisciplinary consensus framework for the study of determinants, research priorities and policy on sedentary behaviour across the life course: a DEDIPAC-study","volume":"13","author":"Chastin SFM","year":"2016","journal-title":"Int J Behav Nutr Phys Act"},{"key":"ref3","doi-asserted-by":"crossref","first-page":"133","DOI":"10.1186\/s12966-015-0291-4","article-title":"A systematic review of determinants of sedentary behaviour in youth: a 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