Risk Factors for Colonization of E. coli in Atlantic Bottlenose Dolphins (Tursiops truncatus) in the Indian River Lagoon, Florida

Table 4

Multivariate logistic regression analysis of risk factors for E. coli colonization among bottlenose dolphins.

	Adjusted OR	95% CI	P value
Age
>16.0	1.0	—	—
11.0–15.9	3.5	0.6, 19.6	0.15
6.5–10.9	5.3	0.9, 30.1	0.06
<6.5	8.6	1.3, 57.3	0.03
48 hr precipitation (inches)**
≤0.23	1.0	—	—
0.24–0.80	2.1	2.0, 35.4	< 0.01
≥0.81	2.2	1.2, 70.2	0.04
Septic tanks per year**
≤70.286	1.0	—	—
70.287–82.243	1.9	0.2, 15.4	0.53
≥82.244	6.3	1.0, 39.7	0.05