The prevalence of pressure sores has been frequently reported However, such measures fail to identify how many patients develop sores, while longitudinal changes in prevalence rates are difficult to interpret This paper provides the first report of the incidence of pressure sores across the population of a single NHS Trust hospital During 1991, 360 patients developed sores, an incidence of 4 03 patients per 100 admissions Within orthopaedic wards, the incidence was higher, with 10 3 patients per 100 admissions developing sores