Swimming in public pools/spas in the current or previous week was associated with all 3 symptom complexes , conferring similar risk for each ( RR for GI : 1.33 ; 95 % CI , 0.99-1 .77 ; respiratory : 1.20 ; 95 % CI , 1.04-1 .38 ; dermal : 1.41 ; 95 % CI , 1.08-1 .85 ) .