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. 2010 Mar 24;5(3):e9845. doi: 10.1371/journal.pone.0009845

Table 1. Results of fitting logistic regression models to the data of least weasel predation.

Explanatory variable Coefficient Inline graphic P-value for H0: Inline graphic Odds Ratio Inline graphic *) 95% CI for Inline graphic †)
Difference between E- and E+ voles in the number of belt crossings per hour ( = activityE− − activityE+) 0.01 0.25 1.01 0.99–1.04
Sex of vole −0.60 0.65 0.55 0.00–6.04
Length of the feeding period (days) 0.14 0.19 1.15 0.95–1.40
Difference between E− and E+ voles in weight ( = weightE− − weightE+) 0.12 0.81 1.13 0.42–3.22

*)The estimated odds ratio Inline graphic For quantitative explanatory variables Inline graphic indicates the percent change in the odds of E+ vole being captured for each 1-unit increase in the explanatory variable. For example, for every one day increase in the length of the feeding period, the odds of E+ vole being captured increases by 15%. For categorical variable sex the Inline graphic of 0.55 implies that for females the odds of E+ vole being captured is 0.55 times the odds for males, i.e. 45% lower.

†)The 95% confidence interval for the Inline graphic indicates the range of values within which the odds ratio from 95 of 100 similar studies would be expected to fall. The 95% CI also indicates the precision of the estimated Inline graphic.