Open Access
Table 5
Values provided by a simple linear regression when used to calculate the relationship between the prevalence of natural infection with Fasciola hepatica in snails and the mean altitude, mean annual rainfall or mean annual temperature in different municipalities of Haute-Vienne. Df, degrees of freedom.
| Equation and coefficients | Estimate | Standard error (S.E.) | 95% confidence intervals | t value | p-value |
|---|---|---|---|---|---|
| Prevalence = a.altitude + b | |||||
| a | -1.094 × 10−4 | 8.778 × 10−6 | -1.268 × 10−4;-9.206 × 10−5 | -12.46 | p < 0.001 |
| b | 7.375 × 10−2 | 2.975 × 10−3 | 6.787 × 10−2;7.963 × 10−2 | 24.79 | p < 0.001 |
| Residual S.E.: 0.010; 149 df | |||||
| Multiple R2: 0.5104; adjusted R2: 0.5071 | |||||
| Prevalence = a.rainfall + b | |||||
| a | -6.638 × 10−5 | 9.239 × 10−6 | -8.463 × 10−5;-4.812 × 10−5 | -7.184 | p < 0.001 |
| b | 1.063 × 10−1 | 9.563 × 10−3 | 8.741 × 10−2;1.252 × 10−1 | 11.117 | p < 0.001 |
| Residual S.E.: 0.012; 149 df | |||||
| Multiple R2: 0.2573; adjusted R2: 0.2523 | |||||
| Prevalence = a.temperature + b | |||||
| a | 0.0125 | 0.002 | 0.009;0.016 | 7.964 | p < 0.001 |
| b | -0.098 | 0.017 | -0.132;-0.065 | -5.740 | p < 0.001 |
| Residual S.E.: 0.011; 149 df | |||||
| Multiple R2: 0.2986; adjusted R2: 0.2939 |
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