<prompt> In a stable situation-Incidence prevalence x durationPrevalence Incidence x DurationIncidence Prevalence DurationPrevalence Incidence Duration  <response>: prevalence refers specifically to all current cases existing at agiven point in time ,or over a period of time in a given population. Prevalence depends on 2 factors,incidence and duration of disease. Given assumption that the population is stable,and incidence and duration are unchanging ,the relationship between incidence and prevalence can be expressed as PID incidence mean duration. Parks textbook of preventive and social medicine.K Park. Edition 23.Pg no: 61 