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Table 3 Illness among non-swimmers and swimmers by quintiles of daily average indicator exposures

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

  GI Diarrhea URI Rash Earache Eye
  N % N % N % N % N % N %
Enterococcus CCE Δ Δ 1
   Non-swimmer 159 5.86 100 3.69 109 4.07 68 2.49 35 1.26 86 3.07
   56.8,125 31 5.21 22 3.70 33 5.60 29 4.82 12 1.96 23 3.75
   125,170 30 6.90 20 4.60 17 3.90 15 3.45 6 1.36 8 1.79
   170,268 44 8.22 21 3.93 31 5.88 18 3.30 13 2.35 12 2.17
   268,396 50 10.35 28 5.81 26 5.42 18 3.68 7 1.41 15 2.99
   396,1.42e+03 52 10.26 45 8.88 36 7.45 20 3.97 9 1.78 14 2.73
Bacteroidales CCE Δ Δ 1
   Non-swimmer 159 5.86 100 3.69 109 4.07 68 2.49 35 1.26 86 3.07
   66.5,542 22 4.32 17 3.34 33 6.57 28 5.35 12 2.27 18 3.41
   542,1.43e+03 36 6.53 24 4.36 23 4.23 20 3.59 10 1.77 11 1.93
   1.43e+03,1.97e+03 33 7.55 16 3.66 22 5.09 11 2.51 6 1.35 10 2.24
   1.97e+03,3.53e+03 55 10.34 37 6.97 38 7.18 17 3.20 12 2.24 14 2.56
   3.53e+03,1.28e+04 61 11.60 42 7.98 27 5.31 24 4.56 7 1.32 19 3.54
Enterococcus CFU2
   Non-swimmer 159 5.86 100 3.69 109 4.07 68 2.49 35 1.26 86 3.07
   0.606,2.32 43 7.39 27 4.64 29 5.06 26 4.48 15 2.51 17 2.82
   2.32,4.29 29 6.92 19 4.55 20 4.78 15 3.55 9 2.12 8 1.86
   4.29,10.2 35 7.64 23 5.02 23 5.13 22 4.73 5 1.06 15 3.16
   10.2,22.9 46 7.36 30 4.80 36 5.85 21 3.32 7 1.10 15 2.33
   22.9,230 54 11.46 37 7.86 35 7.59 16 3.36 11 2.32 17 3.56
Fecal Bacteroides CCE Δ Δ 1
   Non-swimmer 159 5.86 100 3.69 109 4.07 68 2.49 35 1.26 86 3.07
   26.2,69 22 5.63 14 3.58 18 4.68 12 3.01 8 1.98 8 1.99
   69,224 25 6.11 16 3.91 31 7.64 20 4.82 6 1.44 15 3.57
   224,802 33 9.97 22 6.65 20 6.08 15 4.45 5 1.46 5 1.45
   802,2.06e+03 30 8.26 22 6.06 24 6.63 10 2.73 9 2.44 15 4.02
   2.06e+03,6.08e+03 28 8.07 18 5.19 13 3.88 11 3.20 8 2.29 11 3.12
Clostridium CCE Δ Δ 1
   Non-swimmer 159 5.86 100 3.69 109 4.07 68 2.49 35 1.26 86 3.07
   157,503 22 5.47 16 3.98 25 6.27 21 5.11 8 1.92 13 3.10
   503,890 24 6.90 17 4.89 15 4.36 14 4.00 2 0.57 13 3.68
   890,1.45e+03 29 6.94 18 4.31 23 5.50 14 3.29 14 3.25 12 2.76
   1.45e+03,1.79e+03 33 9.73 26 7.67 19 5.81 11 3.27 6 1.76 8 2.34
   1.79e+03,3.51e+03 30 8.98 15 4.49 24 7.29 8 2.37 6 1.76 8 2.33
  1. 1: Calibrator Cell Equivalents per 100 ml calculated by delta delta-CT (CCEΔΔ)
  2. 2: Colony Forming Units per 100 ml
  3. GI: gastrointestinal illness, URI: Upper respiratory illness
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