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87
(1) The Cancer mortality rises as age rises; this is in accordance
with established facts.
(2) Mortality is about evenly distributed between the two
sexes at all ages, making allowance for the preponderance of females
in the general population.
(3) The two main groups of organs attacked in both sexes are
the alimentary system and the reproductive system. In males
71.6% of the total deaths fall within these groups and in females
95.2%. in both sexes Cancer of the digestive system is the commonest
situation, amounting to 61.8% in males and 57.1% in
females. Cancer of the reproductive system caused 38.1% of the
total deaths in females. Cancer of the larynx, tongue and mouth
is much commoner in males than females, 12 deaths occurring in
males as compared with 3 in females. The organs most often
attacked in descending order of incidence are, in males the Rectum
and Bowels (26.6%); the Stomach (16.1%); the Prostate (9.2%);
in females, the Bowels and Rectum (22.8%); the Breast (22.2%);
Stomach (15.9%); and the Uterus (10.6%). This is slightly
different from the incidence in 1931.
The main incidence of Cancer is, in both sexes, on two groups
of organs, both having a common characteristic, namely, periods of
active cell degeneration and regeneration.