Volume 8, Number 7—July 2002
Research
Time-Space Clustering of Human Brucellosis, California, 1973–1992 1
Table 1
Ederer-Myers-Mantel (EMM) procedure for time-space clustering of reported human brucellosis cases, California, 1973–1992
Population | No. of cases | Chi squarea | p valueb |
---|---|---|---|
Hispanic | 305 | 3.800 | 0.03 |
Non-Hispanic | 111 | 6.078 | 0.007 |
Total | 416 | 8.100 | 0.002 |
aEMM test statistic follows an approximate chi-square distribution with 1 degree of freedom.
bp-value based on a one-sided test (half of usual chi-square p-value).
1 Preliminary results of this study were presented at the 9th Symposium of the International Society for Veterinary Epidemiology and Economics, August 6–11, 2000, Breckenridge, Colorado, USA.