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    is it possible to reverse calculate male and female proportion from incidence rate?

    Article attached as requested. 2nd qn means if I am to take M:F incidence ratio as 1.9 : 1.8, and then calculate the male and female proportions from 1413 cases, which would be 1.9x + 1.8x = 1413 , x = 381.891..., so that would give me 1.9x = 726 males and 1.8x = 687 females. Am I allowed to...
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    is it possible to reverse calculate male and female proportion from incidence rate?

    I got a question to ask about reverse-calculation. If i have the total number of acral melanoma = 1413 out of the total cutaneous melanomas = 88 8885. The cohort study went on for 20 years. the total incidence rate is 1.8 per 100 000 person-years for Acral melanoma In acral melanoma...