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Table 2 Attributable risks (95% CI) for the development of symptoms among water recreators, by activity

From: Estimate of incidence and cost of recreational waterborne illness on United States surface waters

  Incidental-Contact: Fishinga Other Incidental-Contactb Swimming/Wadingc
  Probability of illness if exposed water/fish/bait (95% CI) Probability of illness if unexposed (95% CI) Attributable Risk (95% CI) Probability of illness if exposed to water (95% CI) Probability of illness if unexposed (95% CI) Attributable Risk (95% CI) Probability of illness if exposed to water (95% CI) Probability of illness if unexposed (95% CI) Attributable Risk (95% CI)
AGI 0.053 (0.039, 0.065) 0.038 (0.031, 0.046) 0.015 (−0.003, 0.030) 0.040 (0.036, 0.046) 0.034 (0.028, 0.040) 0.006 (−0.002, 0.014) 0.040 (0.036, 0.043) 0.025 (0.022, 0.029) 0.015 (0.010, 0.020)
Respiratory --d --d 0.182 (0.171, 0.192) 0.210 (0.196, 0.226) --e 0.054 (0.050–0.058) 0.049 (0.044, 0.054) 0.005 (−0.002, 0.011)
Eye --d --d 0.081 (0.074, 0.088) 0.073 (0.063, 0.083) 0.008 (−0.004, 0.019) 0.029 (0.027, 0.032) 0.029 (0.026, 0.032) --e
Ear --d --d 0.017 (0.014, 0.020) 0.017 (0.011, 0.020) --e 0.016 (0.014, 0.018) 0.012 (0.010, 0.015) 0.004 (−0.0001, 0.006)
Skin 0.087 (0.070, 0.102) 0.095 (0.084, 0.107) --e 0.083 (0.075, 0.090) 0.093 (0.082, 0.104) --e 0.029 (0.027, 0.032) 0.023 (0.020, 0.027) 0.006 (0.002, 0.010)
  1. a Comparing those who fish to the unexposed group (non-water recreators) in CHEERS
  2. b Comparing those who engage in incidental-contact water recreation (kayaking, canoeing, boating, rowing) to unexposed group (non-water recreators) in CHEERS
  3. c Comparing those who have any contact with beach water (swimmers/waders) to the unexposed group (non-water recreators) in NEEAR
  4. d Anglers not expected to have excess risk of respiratory, eye, ear, or skin illness due to nature of fishing exposure
  5. e No AR calculated, since no excess of illness among the exposed compared to unexposed