This document summarizes a study examining variation in county-level stroke mortality rates in China between 1986-1988 and potential risk factors. The study found nearly a 7-fold difference in stroke mortality rates between counties for both men and women. Higher latitude was correlated with higher mortality. For women, higher blood pressure, green vegetable consumption, BMI, and HDL cholesterol were also correlated, but no single factor explained more than 20% of the variation. The study suggests stroke risk is influenced by combinations of multiple factors.