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Previous Volume 360:1911 April 30, 2009 Number 18 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: Gu and colleagues (Jan. 8 issue)¹ report that in 2005, an estimated 673,000 deaths in China were attributable to smoking. The study is of timely importance. But it did not include some important variables in the analysis. First, the effects of family income were not considered. In China, social deprivation is a major risk factor for ill health,² and data from a survey about household income and cigarette consumption³ and from a study involving low-income employees⁴ showed that smoking was associated with relatively high income. Without this adjustment, the association of mortality with smoking may have been . . . [Full Text of this Article]

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