<prompt> All of the following statements regarding prevalence are true except -It is rateIt is ratioDuration of disease effects prevalenceNone  <response>: Ans. is a i.e., It is rate Prevalence is a propoion o Most commonly used measure of prevalence is point prevalence. No. of all current cases old New Point prevalence -___ x 100 Estimated population at the same time o It has following features : ? i Numerator no. of all cases is pa of denominator total population, including cases. ii Time interval is not specified iii Multiplier is 100. o All are features of propoion see above explantion. About option b o Option b is paially correct, because propoion is a specific type of ratio. Also know o Read following statements of Park ? CFR is simply the ratio of deaths to cases - Park Although referred to as a rate, prevalence rate is really a ratio - Park o According to Park, both CFR and prevalence are ratio. o These statements are paially correct because CFR and prevalence are propoion and propoion is a specific type of ratio. o So, keep following points about CFR Prevalence in your mind. i CFR and prevalence are propoion. ii Numerator is a pa of denominator. iii Time period is not specified. iv Multiplier is 100 v if none of the above 4 are provided in options and ratio is there amongst the options, then ratio will be the best answer. 