Table 5. Independent variables tested as risk factors for BCS = 4 or 5 and statistics associated with the univariate logistic regression.
Hypothesis | Variable | Reference | N | Beta | OR | P value |
---|---|---|---|---|---|---|
Demographics | ||||||
+ | Age | 230 | 0.040 | 1.041 | <0.001* | |
0 | Sex | ref = Male | 46 | |||
Female | 184 | 1.044 | 2.841 | <0.001* | ||
0 | Species | ref = African | 131 | |||
Asian | 99 | 0.579 | 1.784 | 0.077^ | ||
0 | Origin | ref = Wild | 168 | |||
Captive | 58 | -1.035 | 0.352 | <0.001* | ||
Exercise | ||||||
- | Exercise Week | ref = 1 | 47 | |||
2 | 85 | -0.598 | 0.549 | 0.193 | ||
4 | 20 | -0.061 | 0.940 | 0.933 | ||
5 | 33 | -0.566 | 0.567 | 0.187 | ||
6 | 5 | -1.080 | 0.339 | 0.089^ | ||
7 | 15 | -1.467 | 0.230 | 0.009* | ||
- | Walk Week | ref = 1 | 94 | |||
2 | 71 | -0.242 | 0.784 | 0.562 | ||
4 | 13 | -0.540 | 0.582 | 0.357 | ||
5 | 12 | 0.078 | 1.081 | 0.902 | ||
6 | 7 | -0.869 | 0.419 | 0.148^ | ||
7 | 8 | -1.486 | 0.226 | 0.017* | ||
Feeding | ||||||
- | Feed Day | 215 | -0.052 | 0.948 | 0.290 | |
- | Feed Night | 215 | -0.119 | 0.887 | 0.283 | |
- | Feed Total | 215 | -0.047 | 0.953 | 0.223 | |
- | Feeding Predictability | ref = 1 | 166 | |||
2 | 49 | -0.573 | 0.563 | 0.125^ | ||
- | Feeding Diversity | 215 | 1.262 | 3.533 | 0.038* | |
- | Spread | 215 | 0.391 | 1.478 | 0.647 | |
+ | Alternative Feeding Methods | 222 | -0.496 | 0.608 | 0.465 | |
Housing | ||||||
+ | Percent Time Indoor | 228 | -0.010 | 0.989 | 0.193 | |
- | Percent Time In/Out Choice | 228 | 0.002 | 1.002 | 0.739 | |
- | Space Experience per Elephant | 228 | 0.023 | 1.023 | 0.002* | |
- | Space Experience | 228 | 0.005 | 1.005 | 0.009* | |
Social | ||||||
- | Animal Contact | 228 | 0.037 | 1.037 | 0.396 | |
- | Social Group Contact | 228 | 0.031 | 1.031 | 0.021* | |
Training and Enrichment | ||||||
+ | Rewarding Stimuli Techniques Score | Ref = 5 | 11 | |||
6 | 33 | 1.323 | 3.755 | 0.169 | ||
7 | 89 | 1.710 | 5.531 | 0.077^ | ||
8 | 78 | 1.556 | 4.743 | 0.112^ | ||
9 | 2 | -21.990 | <0.001 | <0.001* | ||
- | Enrichment Diversity | 213 | -0.216 | 0.805 | 0.826 |
^P value <0.15 utilized as threshold significant level for model building
*P value <0.05. BCSs 1 and 2 are excluded from analysis.
Hypothesis: + Increase odds of having BCS 4 or 5;—Decrease odds of having BCS 4 or 5; 0 Neutral relationship