Table 8.

AORs of GI illness based on multivariate model using the Enterococcus (log₁₀) culture method indicator excluding participants with pre-existing and chronic GI illness

Outcome Season	Gastrointestinal (GI) illness
	Summer AORsa (95% CI)b	Autumn AORsa (95% CI)b
Type of water contact
Bathers	0.69 (0.34–1.38)	1.33 (0.38–4.61)
Non-bathers	1.00 (Reference)	1.00 (Reference)
Sex
Female	1.04 (0.57–1.89)	2.59 (1.02–6.58)c
Male	1.00 (Reference)	1.00 (Reference)
Age (years)
<5	12.35 (2.76–55.26)c	6.51 (0.77–55.02)
5–14	1.00 (Reference)	1.00 (Reference)
15–24	3.87 (0.83–18.13)	1.35 (0.17–10.59)
25–34	3.68 (0.76–17.90)	2.20 (0.37–13.97)
35–44	7.09 (1.49–33.64)c	0.42 (0.03–5.15)
45–54	6.51 (1.43–29.65)c	2.68 (0.31–23.18)
>54	3.20 (0.56–18.21)	1.14 (0.07–19.58)
Sand exposure
Yes	1.35 (0.57–3.23)	0.92 (0.27–3.14)
No	1.00 (Reference)	1.00 (Reference)
Water quality
Daily average of log10 indicator parameter	6.73 (0.44–103.92)	1.38 (0.32–5.89)

^aAdjusted for water contact, sex, age, sand exposure, and water quality.

^bCI = confidence interval.

^cp-value <0.05.