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statistical approaches could have been done 50 years ago. Imagine for example that 'disease books' are published each month with tables of disease probabilities per city, per industry, per workplace, etc. It would also have aggregated stats grouped by by age, gender, religion, wealth, etc. Your GP would grab the page for the right city, industry, workplace, age, gender etc. That would then be combined with the pages for each of the symptoms you have presented with, and maybe further pages for things from your medical history, and test results. All the pages would then be added up (perhaps with the use of overlayed cellophane sheets with transparency), and the most likely diseases and treatments read off. When any disease is then diagnosed and treatment commenced (and found effective or ineffective), your GP would fill in a form to send to a central book-printer to allow next months book edition to be updated with what has just been learned from your case. |