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Table 1 Beachgoers with and without earache 10–12 days after beach visit, by demographic characteristics 1,2

From: The incidence and health burden of earaches attributable to recreational swimming in natural waters: a prospective cohort study

  Earache
  No Yes Total
  No. % No. % No. %
Age category       
1 and under 1058 97.6 26 2.4 1084 100.0
2–5 3478 98.0 70 2.0 3548 100.0
6–10 4819 97.7 111 2.3 4930 100.0
11–19 7839 98.4 125 1.6 7964 100.0
20–50 26723 98.5 407 1.5 27130 100.0
Over 50 7586 99.0 80 1.0 7666 100.0
Sex       
Male 23289 98.6 333 1.4 23622 100.0
Female 29037 98.3 493 1.7 29530 100.0
Race       
Non-white 21060 98.4 337 1.6 21397 100.0
White 31241 98.5 489 1.5 31730 100.0
Swimmingexposure       
No contact 14037 99.0 144 1.0 14181 100.0
Contact withouthead immersion 13351 98.7 179 1.3 13530 100.0
Head immersion 24736 98.0 501 2.0 25237 100.0
Contact withunfamiliar animals       
No 48059 98.5 727 1.5 48786 100.0
Yes 4371 97.7 102 2.3 4473 100.0
Used sunblock       
No 19195 98.7 250 1.3 19445 100.0
Yes 32964 98.3 573 1.7 33537 100.0
Used insect repellent       
No 47355 98.5 723 1.5 48078 100.0
Yes 4824 97.9 101 2.1 4925 100.0
Asthma       
No 48615 98.5 733 1.5 49348 100.0
Yes 3786 97.5 96 2.5 3882 100.0
Chronic skin condition       
No 49942 98.5 780 1.5 50722 100.0
Yes 2454 98.0 49 2.0 2503 100.0
Allergies       
No 43808 98.6 635 1.4 44443 100.0
Yes 8569 97.8 194 2.2 8763 100.0
Used earplugs       
No 51781 98.4 816 1.6 52597 100.0
Yes 568 97.8 13 2.2 581 100.0
Other swimming 3       
No 35708 98.8 449 1.2 36157 100.0
Yes 16648 97.8 379 2.2 17027 100.0
Beach type       
Fresh 20437 98.7 267 1.3 20704 100.0
Marine 31996 98.3 562 1.7 32558 100.0
  1. 1Including waders, excluding those with earache at baseline and earache due to allergy (N = 53,262).
  2. 2Categories may not add to 53,262 due to missing values.
  3. 3Other head immersion swimming in the 1-week prior to the beach visit.