Rapidly measured indicators of recreational water quality and swimming-associated illness at marine beaches: a prospective cohort study

Table 6 Illness by exposure to Enterococcus CFU, above and below EPA guidelines

	Number ill	%	AOR¹(95% CI)	AOR²(95% CI)
GI
Non-swimmer	159	5.86	ref
Swimmer-below 35 CFU	171	7.7		ref
Swimmer-above 35 CFU	36	10.75	1.52(0.96-2.4)	1.2(0.75-1.91)
Total	366	6.94
Diarrhea
Non-swimmer	100	3.69	ref
Swimmer-below 35 CFU	108	4.87		ref
Swimmer-above 35 CFU	28	8.36	1.78(1.02-3.09)	1.4(0.8-2.43)
Total	236	4.48
URI
Non-swimmer	109	4.07
Swimmer-below 35 CFU	116	5.3		ref
Swimmer-above 35 CFU	27	8.28	1.78(1.02-3.11)	1.35(0.77-2.38)
Total	252	4.85
Rash
Non-swimmer	68	2.49	ref
Swimmer-below 35 CFU	92	4.11		ref
Swimmer-above 35 CFU	8	2.36	1.12(0.47-2.68)	0.68(0.28-1.63)
Total	168	3.17
Earache
Non-swimmer	35	1.26	ref
Swimmer-below 35 CFU	37	1.63		ref
Swimmer-above 35 CFU	10	2.93	2.37(1.06-5.31)	1.8(0.84-3.83)
Total	82	1.53
Eye irritation
Non-swimmer	86	3.07	ref
Swimmer-below 35 CFU	60	2.62		ref
Swimmer-above 35 CFU	12	3.53	1.09(0.56-2.15)	1.3(0.65-2.59)
Total	158	2.91

1: Adjusted Odds Ratio: Swimmers Above 35 CFU vs. non-swimmers
2: Adjusted Odds Ratio: Swimmers above 35 CFU vs. swimmers below 35 CFU
GI: Gastrointestinal illness; URI: Upper Respiratory Illness; 95% CI: 95% Confidence interval

ISSN: 1476-069X