Forty-Year Follow-Up of Coronary Heart Disease Mortality
The exact cause of death in several cases in this study could not be ascertained. Thus, the calculated cause-specific HR, after adjustment for several predictors, may be over-or underestimated. Also, regarding the current status of three out of the 67 surviving men, we obtained the information from family or neighbors, since they themselves were unable to provide accurate information. Finally, the small number of men alive after 40 years increases the uncertainty of the mathematical calculations of the estimated survival.