RT Journal Article SR Electronic T1 Infantile hypertrophic pyloric stenosis in Greater Manchester. JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 149 OP 152 DO 10.1136/jech.37.2.149 VO 37 IS 2 A1 J P Walsworth-Bell YR 1983 UL http://jech.bmj.com/content/37/2/149.abstract AB An "unprecedented" rise in the incidence of infantile hypertrophic pyloric stenosis (IHPS) was reported from the Central Region of Scotland in 1979. Examination of statistics from Greater Manchester showed a similar trend in some district health authorities but not others. Possible explanations are examined but future research is required. Hospital Activity Analysis can provide a useful tool for such research.