Document VKLXjLaJom128GqByRbVrZ1Mg

.62 TABLS 23 Annual Death Rates per 100,000 for Caacer of.the Lung in Canada* Age Grouss 1931-1933 Crouos of Years 1941-1943 1950-1952 Under 30 30-34 35-39' 40-44 45-49 50-54 55-59 60-64 65-69 70-74 75-79 80-84 8S + All Ages 0.2 0.9 2.0 3.0 5.2 8.2 12. 7 12.5 15.1 10.7 15.3 B.2 11.4 2.3 0.3 0.9 3.2 5.4 12.5 18.9 27. 0 33.7 34.5 30.6 30.0 27.9 14. 3 7. 1 t.O 0.8 3.0 6.5 16.7 37. Z 59. 7 77.8 102.9 86. 3 83.9 59. 7 71.0 15.8 * "Mortality from Lung Cancer in Canada", 1931 to 1952. These figures show strikingly the increase in rates be tween 1931 and 1952, and this increase is particularly marked after age 50, confirming an observation previously made, to the effect that lung cancer has probably been under'diagnosed in the older age groups in the general population. To use these figures for purposes of comparison, it is necessary to combine the rates for certain, age groups in order to conform to the age distributions used in this study. Since the exact populations in each age group for the years indicated is not loiown,