||Miscellanea: A Test to Detect Clusters of Disease.
Whittemore, A. S. ;
Friend, N. ;
Brown, B. W. ;
Holly., E. A. ;
||Stanford Univ., CA. School of Medicine.;Health Effects Research Lab., Research Triangle Park, NC.
Statistical tests ;
Statistical distributions ;
Multivariate analysis ;
Disease outbreaks ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
A test is given to detect clustering in disease incidence or mortality data. The test statistic is the mean distance between all pairs of disease cases. Its null mean and variance and its asymptotic normality are derived under assumptions that accommodate differences in population distribution among demographic subgroups at different disease risk. The test is illustrated on 63 cases of anal and rectal squamous cell carcinoma in San Francisco during 1973-1981.