Scores of a web-based version of the seasonal pattern assessment questionnaire in Brazil

Autores

  • Denis Martinez Graduate Program in Medical Sciences, Universidade Federal do Rio Grande do Sul (UFRGS); Hospital de Clínicas de Porto Alegre (HCPA); Graduate Program in Cardiology and Cardiovascular Sciences, UFRGS.
  • Roberto Pacheco da Silva Graduate Program in Cardiology and Cardiovascular Sciences, UFRGS
  • Cristiane Maria Cassol Graduate Program in Cardiology and Cardiovascular Sciences, UFRGS
  • Gabriel Natan Pires Department of Psychobiology, Universidade Federal de São Paulo (UNIFESP).

Palavras-chave:

Seasonality, Seasonal Affective Disorder, SPAQ, Depression, Psychometrics

Resumo

Introduction: Seasonal affective disorder (SAD) is a proposed mental disorder still controversial. This condition is prevalent in northern latitudes, but few studies have been conducted at locations in the southern hemisphere. It is usually assessed by the Seasonal Pattern Assessment Questionnaire (SPAQ). This study aimed to evaluate, through on-line questionnaire, the hypothesis that, in the Brazilian population, latitude and longitude influence SPAQ scores.

Methods: An advertisement was posted on a sleep medicine website inviting visitors to investigate seasonal patterns of behavior and mood, using a Brazilian Portuguese version of the SPAQ. The geographic coordinates of the place of residence of each respondent were analyzed as a continuous variable or distributed in quartiles of latitude and longitude. The psychometric properties of the SPAQ were assessed by reliability and factor analyses.

Results: Answers from 1001 respondents out of 1045 were considered eligible. High SPAQ scores were observed in 287 respondents, equally distributed among all latitude and longitude quartiles. Data collected in different seasons and during daylight saving time did not differ significantly in any of the scores for SPAQ dimensions. No correlations between SPAQ scores and latitude or longitude were observed. Psychometric properties of the SPAQ were preserved in all geographic locations.

Conclusion: The finding of similar SPAQ scores at a wide latitude range defies the concept of SAD symptoms as latitude or longitude-dependent phenomena. 

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Publicado

2015-12-28

Como Citar

1.
Martinez D, da Silva RP, Cassol CM, Pires GN. Scores of a web-based version of the seasonal pattern assessment questionnaire in Brazil. Clin Biomed Res [Internet]. 28º de dezembro de 2015 [citado 28º de março de 2024];35(4). Disponível em: https://seer.ufrgs.br/index.php/hcpa/article/view/59646

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