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. 2023 Jun 2;18(6):e0286584. doi: 10.1371/journal.pone.0286584

Table 1. Characteristics of 831 beachgoers surveyed at Woodbine Beach, Toronto, 2022, stratified by enrollment month.

AGI = acute gastrointestinal illness.

N (%)
Characteristic June July August Total
Age group:
 0–14 55 (20.5) 25 (9.5) 23 (7.9) 103 (12.5)
 15–19 31 (11.6) 50 (18.9) 57 (19.7) 138 (16.8)
 20–39 142 (53.0) 155 (58.7) 169 (58.3) 466 (56.7)
 40+ 40 (14.9) 34 (12.9) 41 (14.1) 115 (14.0)
 Missing 3 1 5 9
Gender identity:
 Woman/girl 174 (64.7) 154 (59.7) 205 (70.4) 533 (65.2)
 Man/boy 89 (33.1) 99 (38.4) 82 (28.2) 270 (33.0)
 Gender fluid, non-binary, or transgender 6 (2.2) 5 (1.9) 4 (1.4) 15 (1.8)
 Missing 2 7 4 13
Household income (CAD$):
 <$40,000 44 (21.2) 17 (16.8) 1 (4.5) 62 (18.7)
 $40,000–79,999 39 (18.8) 37 (36.6) 6 (27.3) 82 (24.8)
 $80,000–149,999 72 (34.6) 32 (31.7) 12 (54.5) 116 (35.0)
 $150,000+ 53 (25.5) 15 (14.9) 3 (13.6) 71 (21.5)
 Missing 63 164 273 500
Highest education completed in household:
 High school or less 58 (22.6) 58 (36.0) 70 (41.2) 186 (31.6)
 College, trades, or apprenticeship 49 (19.1) 27 (16.8) 43 (25.3) 119 (20.2)
 Bachelor’s degree 64 (24.9) 32 (19.9) 57 (33.5) 153 (26.0)
 Post-graduate degree 86 (33.5) 44 (27.3) 0 (0.0) 130 (22.1)
 Missing 14 104 125 243
Location of residence:
 Ontario 249 (91.9) 241 (90.9) 283 (95.9) 773 (93.0)
 U.S. 14 (5.2) 12 (4.5) 7 (2.4) 33 (4.0)
 Quebec 5 (1.8) 9 (3.4) 2 (0.7) 16 (1.9)
 Other Canadian provincesa 3 (1.2) 3 (1.1) 3 (1.0) 9 (1.1)
Ethno-racial identity:
 White 130 (52.2) 135 (60.5) 146 (59.8) 411 (57.4)
 South Asian 18 (7.2) 22 (9.9) 21 (8.6) 61 (8.5)
 Southeast Asian 9 (3.6) 15 (6.7) 24 (9.8) 48 (6.7)
 Arab or Middle Eastern 15 (6.0) 14 (6.3) 18 (7.4) 47 (6.6)
 East Asian 19 (7.6) 11 (4.9) 11 (4.5) 41 (5.7)
 Latin 20 (8.0) 9 (4.0) 5 (2.0) 34 (4.7)
 Black 13 (5.2) 7 (3.1) 13 (5.3) 33 (4.6)
 Multiple ethnicities 16 (6.4) 9 (4.0) 6 (2.5) 31 (4.3)
 Indigenous 9 (3.6) 1 (0.4) 0 (0.0) 10 (1.4)
 Missing 22 42 51 115
Baseline illness statusb:
 Respiratory illness 8 (3.0) 7 (2.6) 1 (0.3) 16 (1.9)
 AGI 5 (1.8) 1 (0.4) 1 (0.3) 7 (0.8)
 Skin infection 4 (1.5) 1 (0.4) 1 (0.3) 6 (0.7)
 Ear infection 1 (0.4) 0 (0.0) 0 (0.0) 1 (0.1)
 Eye infection 0 (0.0) 1 (0.4) 0 (0.0) 1 (0.1)
Baseline health conditionsb:
 Allergies 16 (5.9) 25 (9.4) 30 (10.2) 71 (8.5)
 Chronic respiratory condition 7 (2.6) 8 (3.0) 12 (4.1) 27 (3.2)
 Chronic gastrointestinal condition 8 (3.0) 6 (2.3) 1 (0.3) 15 (1.8)
 Immune-compromised 3 (1.1) 5 (1.9) 2 (0.7) 10 (1.2)
Engaged in other recreational water activities within the past 2 weeks 85 (31.4) 122 (46.0) 141 (47.8) 348 (41.9)

a Other provinces included Alberta (N = 5), Nova Scotia (N = 2), and British Columbia and Newfoundland and Labrador (N = 1 each).

b Multiple selections were possible for these variables.