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. 2023 Jul 19;11:e15718. doi: 10.7717/peerj.15718

Table 4. Cox proportional hazards model, modelling the survivability of three types of dogs (mongrel, cross-bred, and pure breed).

β Wald df p-value e β eβ 95% CI
Lower Upper
Cross −0.177 105.474 1 <.001 0.838 0.810 0.867
Mongrel −0.494 527.621 1 <.001 0.610 0.585 0.637

Notes.

The model is highly significant (−2 Log Likelihood 567,623, χ2 = 595, 2 df, p < 0.001). The parameter ‘Type of dog’ is significant (Wald 585, 2 df, p < 0.01). ‘Pure breed’ is the baseline type of dog.