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[Correspondence] Happiness, health, and mortality

The paradox that some nations with low life expectancy have happy citizens, whereas residents of countries with excellent longevity can appear miserable is well known.1 Although the paper by Bette Liu and colleagues2 also seems to suggest that happiness does not lead to longer lives, we contend this conclusion is premature. The authors concluded happiness does not lead to longer lives only after they controlled for individual differences in self-rated health which is a serious issue of statistical overadjustment.

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