Table 3. The distribution of asymptomatic and symptomatic cases for each sex and age group.

	ASYMPTOMATIC (N=7149)	SYMPTOMATIC (N=588)	TOTAL (N=7737)	P VALUE
SEX				< 0.01
(MISSING)	314 (4%)	10 (2%)	324 (4%)
FEMALE	2192 (31%)	263 (45%)	2455 (32%)
MALE	4643 (65%)	315 (54%)	4958 (64%)
AGE CATEGORY (YEARS)				< 0.01
MISSING	230	13	243
>0–20	883 (13%)	36 (6%)	919 (12%)
>20–30	1924 (28%)	121 (21%)	2045 (27%)
>30–40	1910 (28%)	131 (23%)	2041 (27%)
>40–50	1236 (18%)	117 (20%)	1353 (18%)
>50	966 (14%)	170 (30%)	1136 (15%)