Document 3wrp9BZmdZBmNoz08ajEZwmO

36. l/ One further Interesting observation from Tsblo l/li tbs rttlier marked Increase la the total number of cases for the Province between 1950 sad 1955. It Is assumed that at least partaf this Increase Is due to Im proved recognition and reporting of lung cancer during tho Interval. For this reason, the years. 1954 and 1955 were thought to be more nearly repre- \ ssstatlre of actual conditions. Even so. U Is qulto likely that the genoral ' population la not studied for lung cancer with the same dlllgonce with which Otis disease to looked for la the miners, and It atoms probable that tho mor- tellty rates for the Province may bo low. This would appear to be substan tiated by tho fact that the reporting of cases In the cohort ohowed no such c; i. Increase over the same period. * Cl ,7 '' > Table io was compiled to show the annual age-epeclflc lung cancer 4 rats of cssao In which the death certificate meroly read "cancer of tho lung", as distinguished from thooa In which the diagnosis woe confirmed by autopsy, surgery, or biopsy, Tho. term "specified primary"' rofors to those cases la '* .. I, t * , ' `* . S* , these two eetagorloe In which the tumor was apoclfled as having orlglaatsd Is the lung. It will be noted that, of tho total cases reported In 1955, a much higher percentage than In 195-4 were spaclflad as primary. Tho table also shows that a higher percentage of the total caeaa certified In 1955 were proved, again Indicating'Increasing Interest In this dlseaae. 0286 %rrr.-