Table 2.
Summary of the coefficients (Coef), rate ratios (RR), odds ratios (OR), standard errors (SE), and P values for all predictor variables in the top ranked substrate-level nymphal models for Ixodes pacificus density and prevalence
| Top density model | Top prevalence model | |||||||
|---|---|---|---|---|---|---|---|---|
| Variable | Coef | RR | SE | P value | Coef | OR | SE | P value |
| Intercept | −4.96 | 0.007 | 0.33 | <0.001 | −5.09 | 0.01 | 0.35 | <0.001 |
| 2016 | 0.93 | 2.53 | 0.17 | <0.001 | 0.92 | 2.52 | 0.17 | <0.001 |
| 2017 | 0.67 | 1.95 | 0.17 | <0.001 | 0.80 | 2.22 | 0.17 | <0.001 |
| Mar. | 1.78 | 5.93 | 0.27 | <0.001 | 1.71 | 5.54 | 0.26 | <0.001 |
| April | 2.04 | 7.69 | 0.27 | <0.001 | 2.14 | 8.48 | 0.26 | <0.001 |
| May | 1.67 | 5.31 | 0.28 | <0.001 | 1.50 | 4.48 | 0.27 | <0.001 |
| June | 1.73 | 5.64 | 0.28 | <0.001 | 1.34 | 3.84 | 0.28 | <0.001 |
| July | −1.74 | 0.18 | 0.64 | 0.007 | −1.69 | 0.18 | 0.63 | 0.007 |
| Rock | 1.42 | 4.14 | 0.18 | <0.001 | 1.36 | 3.91 | 0.20 | <0.001 |
| Log | 1.95 | 7.03 | 0.18 | <0.001 | 1.89 | 6.60 | 0.20 | <0.001 |
| Tree Trunk | 0.60 | 1.82 | 0.20 | 0.003 | 0.67 | 1.96 | 0.22 | 0.002 |
| Canopy Cover: Medium | 0.59 | 1.80 | 0.15 | <0.001 | 0.67 | 1.95 | 0.17 | <0.001 |
| Canopy Cover: High | 0.76 | 2.14 | 0.19 | <0.001 | 0.88 | 2.42 | 0.21 | <0.001 |
Models compared nymphal Ixodes pacificus density or prevalence and the predictor variables year, month, substrate type, and canopy cover. The coefficients for the referent categories 2015, Feb., leaf litter, and low canopy cover are represented by the intercept.