Premium
Testing for a change‐point in registry data with an example on hypospadias
Author(s) -
Simpkin J. M.,
Downham D. Y.
Publication year - 1988
Publication title -
statistics in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.996
H-Index - 183
eISSN - 1097-0258
pISSN - 0277-6715
DOI - 10.1002/sim.4780070304
Subject(s) - poisson distribution , poisson regression , hypospadias , statistics , count data , poisson process , medicine , mathematics , surgery , population , environmental health
The Poisson distribution is often suitable for analysing non‐infectious disorders with low prevalence rates. The numbers of babies born with hypospadias in the Liverpool Congenital Malformations Registry during 1960 to 1982 do not fit a Poisson distribution with constant prevalence rates, but a change‐point Poisson process does fit. A significance test is described and its power is considered in two simulation studies. A small discrepancy is noted that does not diminish appreciably when Bartlett's correction is applied.