Henry Ford Hospital Medical Journal


Age-adjusted cancer mortality rates in the "Thumb" area of Michigan (Huron, Sanilac, and Tuscola counties) were compared with those for the rest of the state from 1971 to 1985. Comparisons were made after partitioning the mortality data on the basis of the patient's sex, year of death (1971 to 1975, 1976 to 1980, or 1981 to 1985), and site of primary tumor. International Classification of Diseases categories were combined to define 29 cancer site groups. The analysis was limited to the white population. The major observation was a consistently lower mortality rate of lung cancer in the Thumb area than in the rest of the stale. This difference was statistically significant for males during two of the three time periods and for females during all three time periods.