FA2019, p259: Remember that prevalence / (1-prevalence) = incidence * (average duration of disease). It has nothing to do with this but I wanted to write that because I saw it written wrong on another website explaining this. This is a very simple question that I completely overthought. To answer this question, I think all you need to know is that TB is a chronic disease. Therefore incidence > prevalence. Lowering the threshold for negative results will increase the incidence of positive results. And since prevalence must always be greater than incidence, it will increase the prevalence as well. Sounds logical to me now.
submitted by โchaosawaits(93)
FA2019, p259: Remember that prevalence / (1-prevalence) = incidence * (average duration of disease). It has nothing to do with this but I wanted to write that because I saw it written wrong on another website explaining this. This is a very simple question that I completely overthought. To answer this question, I think all you need to know is that TB is a chronic disease. Therefore incidence > prevalence. Lowering the threshold for negative results will increase the incidence of positive results. And since prevalence must always be greater than incidence, it will increase the prevalence as well. Sounds logical to me now.