Table 1 Summary of methods and demographics of the study target groups
Study method | Swimmer population, N | Gender F/M | Mean age (yr) | Distance swam per session (meters) | Stay at swimming pool area (minutes) | Asthma Prevalence % | Allergy Prevalence % | Respiratory symptoms Prevalence % |
|---|---|---|---|---|---|---|---|---|
Questionnaire | 1118 Swimmers: 251 Occasional 734 Fitness 133 Competitive | 650/468 169/82 426/308 55/78 | 43 (19) 39 (19) 48 (16) 20 (12) | 1215 543 993 3418 | 63 60 56 117 | 9 12 8 13 | 23 23 22 28 | 18 13 16 44 |
Spirometry | 130 Competitive | 58 /72 | 17 (3) | 5600 | 120 | 20 | 31 | 45 |