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. 2013 Jan 24;8(1):e54490. doi: 10.1371/journal.pone.0054490

Table 1. Treatment and species level effects of Batrachochytrium dendrobatidis exposure on larval and post-metamorphic stage survival of three amphibian species (Cox Proportional Hazards models).

A. Larval Stage Level Overall Effect Comparison Hazard Ratio p-value
Treatment LRT = 7.4; 3df;p = 0.06 PR NA All >0.05
LRT = 1.79; 3df; p = 0.62 RC NA All >0.05
NA* AB NA NA
Species LRT = 2.13;1df;p = 0.144** H NA All >0.05
LRT = 0.08;1df;p = 0.770** I NA All >0.05
LRT = 1.1; 1df;p = 0.294** L NA All >0.05

Abbreviations are used to denote species identify and treatments: PR = Pseudacris regilla; RC = Rana cascadae; AB = Anaxyrus boreas; H = high dose; I = intermediate dose; L = low dose. NA indicates that the comparison is not applicable because it is precluded by a non-significant overall effect in the model. For all hazard ratios, the comparison is the more extreme group (treatment or species) compared to the less extreme group (i.e., the risk of being in the more “severe”, or higher infectious dose treatment is given and the more “severe” treatment is listed first). LRT = Likelihood ratio test.

*

Indicates no statistical comparison of survival rate across larval Anaxyrus boreas treatments due to zero mortality in all treatments (control, low, intermediate, and high).

**

Indicates comparisons made between Rana cascadae and Pseudacris regilla because there was zero mortality in Anaxyrus boreas precluded inclusion in Cox proportional hazards model.