Salamand colleagues reported the outcomes of treatment ofwomen hospitalized with atrial fibrillation (AF) in Qatar, with special emphasis on the gender difference [1]. Data of a total of 1417 women and 2432 men with cardiac illness from a hospital database were retrospectively analyzed. The results of the analysis revealed that the mean age of the women at admission for atrial fibrillationwas 5 years older than that of the men, and that the prevalence of cardiovascular risk factors was higher in the women. However, there was no gender difference in the cardiovascular mortality or prevalence of stroke. Although there is a limitation in respect of the representativeness of the national trend, the information on the gender difference is important in order to understand the risk of AF in this country. Gender difference of life expectancy at birth is small in the Gulf Corporation Council (GCC) countries, except for Oman. Namely, the life expectancies at birth for women (men) in Qatar, UAE, Bahrain, Kuwait, Saudi Arabia and Oman in 2010 were 77.8(78.4), 77.5(75.7), 75.7(74.4), 75.5(73.7), 75(72.8) and 75.5(70.8), respectively [2]. Thus, Qatar is among the fewcountrieswheremenhave higher longevity as compared with women. Examination of the past 10-year data of life expectancy at birth in Qatar revealed that there has been no change in the trend for a higher life expectancy of men as compared to women. Namely, the data from 2003 to 2009 for men (women) were 77.1 (76.7), 77.3 (76.8), 77.6 (76.9), 77.8 (77.1), 78 (77.2), 78.1 (77.4) and 78.3 (77.6), respectively [2]. I speculate that the longevity of people in GCC countries presents special characteristics, and is different from the developed countries. On this point, lifestyle consideration for people in GCC countries, including Qatar, may reveal more information on their health outcomes. Gender difference in the life expectancy at birth is regulated by biological reasons [3] in combination with lifestyle factors (diet, smoking, drinking, sleeping, exercise, etc) and social factors [4]. Salam and colleagues reported the prognosis of AF, with special emphasis on the gender difference. Similar analyses should also be carried out for other causes of death such as cancer [5]. As Qatar is among the rare countries with a gender difference, favoringmen, of the life expectancy at birth, specific locally existing factors other than conventional risk factors for cardiovascular disease should also be considered for the risk assessment. I wish to express my appreciation to the members of Hygiene and Public Health, Nippon Medical School, for the preparation of this study. The author of this manuscript has certified that they comply with the Principles of Ethical Publishing in the International Journal of Cardiology (2012;161:124–5).
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