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US death records data are available through the Vital Statistics Online Data Portal at The population data are available in the Annual Social and Economic Supplements of the Current Population Survey at The reference death rates by cause and smoking history are available in the appendix of Peto et al

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CDC indicates that many of these cases reported using THC products

Covariate adjustment had non-uniform effects on the magnitude of associations, with some reports showing no effect of covariate adjustment and other studies showing a reduction in the estimate from unadjusted to adjusted models