Table 5

Statistically significant spatiotemporal clusters of accidental poisoning mortality in Texas by gender and race/ethnicity, adjusting for time nonparametrically
Cluster
 Time Period
 No. of Observed Cases
 Annual age-adjusted rate (per 100,000)
 Relative Risk
 p-value
All populations




Primary cluster
 1984–2001
 654
 6.3
 2.261
 0.001
Secondary cluster 1
 1983–2001
 2257
 3.6
 1.306
 0.001
Secondary cluster 2
 1990–1999
 331
 4.4
 1.590
 0.001
Secondary cluster 3
 1993–1999
 1088
 3.5
 1.264
 0.001
Secondary cluster 4
 1992–1994
 38
 8.9
 3.207
 0.002
All Males




Primary cluster
 1984–2001
 588
 10.0
 2.521
 0.001
Secondary cluster 1
 1982–1993
 797
 5.9
 1.475
 0.001
Secondary cluster 2
 1990–2001
 337
 6.4
 1.605
 0.001
Secondary cluster 3
 1993–2001
 1084
 5.0
 1.259
 0.001
Secondary cluster 4
 1992–1994
 27
 13.0
 3.284
 0.027
All Females




Primary cluster
 1983–2001
 916
 2.1
 1.320
 0.001
White Population




Primary cluster
 1983–2001
 1390
 4.3
 1.439
 0.001
Secondary cluster 1
 1980–1997
 220
 5.5
 1.832
 0.001
Secondary cluster 2
 1992–1994
 32
 11.0
 3.679
 0.001
Secondary cluster 3
 1991–1999
 207
 4.6
 1.536
 0.003
Secondary cluster 4
 1993–2001
 544
 3.7
 1.246
 0.019
White Males




Primary cluster
 1983–2001
 950
 5.9
 1.439
 0.001
Secondary cluster 1
 1980–1998
 179
 8.1
 1.987
 0.001
Secondary cluster 2
 1993–2001
 416
 5.8
 1.421
 0.001
Secondary cluster 3
 1990–1999
 171
 6.8
 1.653
 0.001
Secondary cluster 4
 1992–1994
 24
 16.5
 1.037
 0.004
White Females




Primary cluster
 1983–2001
 638
 2.7
 1.409
 0.001
Black Population




Primary cluster
 1993–2001
 122
 6.2
 1.758
 0.002
Black Males




Primary cluster
 1993–2001
 236
 7.2
 1.477
 0.001
Black Females




Primary cluster
 1996–1998
 2
 2031.6
 911.05
 0.026
Hispanic Population




Primary cluster
 1984–2001
 477
 5.6
 2.592
 0.001
Secondary cluster 1
 1993–2001
 368
 3.2
 1.483
 0.001
Hispanic Males




Primary cluster
 1983–2001
 424
 10.4
 2.923
 0.001
Secondary cluster 1
 1989–2001
 88
 7.1
 2.005
 0.001
Hispanic Females




Primary cluster
 1994–2001
 84
 1.5
 1.920
 0.002

Nkhoma et al. International Journal of Health Geographics 2004 3:25   doi:10.1186/1476-072X-3-25

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