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

Table 1

Univariate analysis of individual risk factors for positive and negative E. coli colonization among bottlenose dolphins (n = number of individual dolphins).

	E. coli + n (%)	E. coli − n (%)	OR (95% CI)
Age*
<6.5	11 (50.0)	11 (50.0)	3.8 (1.5, 9.6)
6.5–10.9	11 (39.3)	17 (60.7)	1.9 (0.7, 4.8)
11.0–15.9	9 (39.1)	14 (60.9)	2.5 (1.0, 6.6)
>16.0	3 (18.7)	13 (81.3)	1.00
Gender
Female	10 (35.7)	18 (64.3)	1.00
Male	24 (35.3)	44 (64.7)	1.2 (0.6, 2.3)

*Ages available for 55 of 62 E. coli.