Reliability and validity of the Brazilian version of the Pittsburgh Sleep Quality Index in adolescents
To evaluate the reliability and validity of the Brazilian version of the Pittsburgh Sleep Quality Index. 309 adolescents, subdivided into a sample of 209 subjects, of whom 25 were reassessed, and another sample of 100 adolescents. Reliability was assessed using Cronbach's α-values, intraclass c...
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Published in | Jornal de pediatria Vol. 93; no. 2; pp. 200 - 206 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Brazil
Elsevier Editora Ltda
01.03.2017
Sociedade Brasileira de Pediatria Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | To evaluate the reliability and validity of the Brazilian version of the Pittsburgh Sleep Quality Index.
309 adolescents, subdivided into a sample of 209 subjects, of whom 25 were reassessed, and another sample of 100 adolescents. Reliability was assessed using Cronbach's α-values, intraclass correlation coefficient, Standard Error of Measure, Minimum Detectable Change, and Bland–Altman plotting. Exploratory analysis of the questionnaire components was performed based on the sample of 209 adolescents. Confirmatory factor analysis was performed with a sample of 100 individuals.
The sample of 209 participants had a mean age of 14.38 (±1.94) years, comprising 80 (38.3%) girls and 129 (61.7%) boys. The sample of 100 adolescents had a mean age of 13.66 (±2.35) years, comprising 51 (51%) girls and 49 (49%) boys. The questionnaire obtained a Standard Error of Measure=1.12 and Minimum Detectable Change=3.10. Cronbach's α was 0.71 and the Intraclass Correlation Coefficient was 0.65 (95% CI: 0.21–0.85). The factor analysis showed that the best model of components was the one that consisted of two factors, excluding the component on the use of sleep medications.
The questionnaire showed high internal consistency and moderate reliability. Furthermore, a model with two factors seems to be the most appropriate to evaluate the quality of sleep in adolescents.
Avaliar a confiabilidade e validade da versão brasileira do Índice de Qualidade do Sono de Pittsburgh.
309 adolescentes, subdivididos em uma amostra de 209 indivíduos, dos quais 25 foram reavaliados, e outra amostra de 100 adolescentes. A confiabilidade foi avaliada por meio dos valores de α de Cronbach, Coeficiente de Correlação Intraclasse, Erro Padrão da Medida, Mínima Mudança Detectável e plotado gráfico Bland-Altman. A análise exploratória dos componentes do questionário foi realizada com base na amostra de 209 adolescentes. A análise fatorial confirmatória foi realizada com a amostra de 100 indivíduos.
A amostra de 209 participantes teve uma média de idade de 14,38 (± 1,94) anos, sendo 80 (38,3%) meninas e 129 (61,7%) meninos. A amostra composta por 100 adolescentes, teve uma média de idade de 13,66 (± 2,35) anos, sendo 51 (51%) meninas e 49 (49%) meninos. O questionário obteve Erro padrão da Medida=1,12 e Mudança mínima detectável=3,10. O α de Cronbach foi de 0,71 e Coeficiente de Correlação Intraclasse de 0,65 (IC95% 0,21 - 0,85). As análises fatoriais apontaram como melhor modelo de componentes aquele composto por dois fatores, com exclusão do componente sobre uso de medicamentos para dormir.
O questionário obteve elevada consistência interna e confiabilidade moderada. Além disso, um modelo de dois fatores parece ser o mais adequado para avaliar a qualidade do sono em adolescentes. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0021-7557 1678-4782 1678-4782 |
DOI: | 10.1016/j.jped.2016.06.006 |