Table 4

Personal characteristics of children and adults who underwent clinical examination after 2 weeks and proportion (%) of respiratory symptoms at 15–30 days, Rome, 1998

		Respiratory symptoms^4-151 at 15–30 days
		Children n=123				Adults n=113			Total n=236
		n	%			n	%		n	%
Time to vacate the pool (minutes):
<3	37	13.5		29	24.1		66	18.2
3–5	44	15.9		38	28.9		82	21.9
>5	31	41.9^4-150		45	42.2		76	42.1^4-150
Perception of exposure:
Not at all/a little	73	12.3		54	25.9		127	18.1
A moderate amount	38	36.8		41	34.1		79	35.4
A lot	10	30.0^4-150		18	50.0		28	42.9^4-160
Visit to the emergency department:
No	55	23.6		66	24.2		121	23.9
Yes	68	19.1		47	44.7^4-150		115	29.6
Treatment:^4-152
No	68	20.6		69	24.6		137	22.6
Yes	55	21.8		44	45.5^4-150		99	32.3
History of chronic respiratory disease:
No	107	20.6		100	31.0		207	25.6
Yes	16	25.0		13	46.1		29	34.5
Smoking habit:
Never				72	27.8
Ex				8	37.5
Current				32	40.6

↵4-150 p<0.05;
↵4-160 p<0.005.
↵4-151 Respiratory symptoms include shortness of breath, wheezing, and cough.
↵4-152 Treatment=pharmacological treatment either at the emergency department or at home.
Totals may vary because of missing values.