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. 2017 Apr 17;12(4):e0174711. doi: 10.1371/journal.pone.0174711

Table 5. Binary logistic regression equation employed to predict the outcome of stereotypic behaviour (0 = absence and 1 presence) and FCM levels (0 = low and 1 high) in tigers and leopards using the biological and environmental variables.

Species Included B (SE) 95% CI for odds ratio
Lower Odds ratio Upper
Tiger Stereotype Constant 3.777 (1.389) - 43.67 -
Pool presence -2.594* (1.462) 0.004 0.075 1.311
Stone presence 3.386* (1.769) 0.906 29.028 929.813
Keeper attitude—positive - - -
Keeper attitude—neutral -2.553* (0.891) 0.014 0.078 0.446
Keeper attitude—negative 17.470* (1.797E4) 0.000 3.865E7 -
Enclosure—large -3.412* (1.214) 0.003 0.033 0.356
Sociality—group -1.854* (0.672) 0.042 0.157 0.585
R2 = 0.43 (Hosmer and Lemeshow), 0.249 (Cox & Snell), 0.404 (Nagelkerke); Model χ2 (6) = 32.630, p<0.001; * significant at p < 0.05
Leopard Stereotype Constant -27.226 (2.556E3) - - -
Origin—wild 170.979* (1.534E4) 0.000 1.799E74 -
Pool—absence 55.838* (5.112E3) 0.000 1.778E24 -
Den—presence -147.013* (1.739E4) 0.000 0.000 -
Age -14.306* (1.278E3) 0.000 0.000 -
Tree—low % 48.257* (1.329E4) 0.000 9.073E20 -
R2 = 0.81 (Hosmer and Lemeshow), 0.615 (Cox & Snell), 0.824 (Nagelkerke); Model χ2 (5) = 47.771, p<0.001; * significant at p < 0.05
Tiger FCM Constant 20.180 (1.704E4) - - -
Health problem—nil - 5.807E8 -
Health problem—low -40.653 * (2.112E4) 0.000 0.000 -
Health problem—high -62.755* (2.473E4) 0.000 0.000 -
Enclosure—small 21.572* (1.248E4) 0.000 2.338E9 -
R2 = 0.64 (Hosmer and Lemeshow), 0.649 (Cox & Snell), 0.909 (Nagelkerke); Model χ2 (3) = 23.023, p<0.001; * significant at p < 0.05
Leopard FCM Constant -21.203* (1.340E4) 0.000 -
Stone—absence 20.797* (1.340E4) 0.000 1.077E9 -
Keeper attitude—neutral 21.608* (2.842E4) 0.000 2.423E9 -
R2 = 0.94 (Hosmer and Lemeshow), 0.675 (Cox & Snell), 0.95 (Nagelkerke); Model χ2 (3) = 17.995, p<0.001; * significant at p < 0.05