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  • Title: Cross-national survey of winter and summer patterns of mood seasonality: a comparison between Italy and India.
    Author: Tonetti L, Sahu S, Natale V.
    Journal: Compr Psychiatry; 2012 Aug; 53(6):837-42. PubMed ID: 22225787.
    Abstract:
    The aim of this study was to compare winter and summer patterns of mood seasonality in university students living at different latitudes: Bologna, 44° N (Italy), and Kalyani, 22° N (India). To assess the mood seasonality, the Seasonal Pattern Assessment Questionnaire was administered to 1370 university students (808 females, 562 males; 862 Italians, 508 Indians), ranging in age between 18 and 28 years. A significantly higher Global Seasonality Score was observed in females than males as well as in Italians than Indians. The estimated rates of summer seasonal affective disorder (SAD) and summer subsyndromal SAD were higher in Indians, whereas Italians reported higher percentage of winter SAD and winter subsyndromal SAD. The present findings are discussed in relation to the different environmental features between the 2 countries: high summer temperature in India and short winter photoperiod along with its great excursion over the year in Italy.
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