Table 2 |
|||
|
Validation of the nymphal tick immigration index. |
|||
| Variable |
Factor |
Coefficient (SE) |
Wald z |
|
|
|||
| Index of tick immigration |
0.043 (0.004) |
10.86*** |
|
| Province |
Newfoundland & Labrador |
Reference factor |
|
| Saskatchewan |
-2.524 (0.254) |
-4.12*** |
|
| Manitoba |
1.692 (0.289) |
5.85*** |
|
| Ontario |
-1.27 (0.299) |
-4.24*** |
|
| Quebec |
-0.405 (0.304) |
1.33 |
|
| New Brunswick |
0.482 (0.303) |
1.59 |
|
| Prince Edward Island |
3.131 (0.315) |
9.93*** |
|
| Nova Scotia |
0.583 (0.349) |
1.67 |
|
| Constant |
-9.831 (0.254) |
-38.65 |
|
|
*** = P < 0.001 The association of the nymphal tick immigration index with the number of I. scapularis submitted in each Canadian census sub-division in passive surveillance in Canada from 1990 to 2003 was investigated using a multivariable negative binomial regression model. In this model nymphal tick immigration index and Province were explanatory variables, and the natural logarithm of human population was included as an offset. | |||
Ogden et al. International Journal of Health Geographics 2008 7:24 doi:10.1186/1476-072X-7-24 |
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