Table 1.

Studied population according to age and sex

Age group (year)	Male	Female	Total	Mean age (years)	SD of mean age (years)
0-5	37	45	82	3.5	1.2
6-10	125	108	233	8.3	1.4
11-20	208	249	457	14.4	2.8
21-30	96	353	449	25.6	2.6
31-40	96	282	378	35.2	2.8
41-50	54	185	239	45.2	2.9
51-60	54	136	190	55.2	2.9
>60	63	134	197	70.1	7.2
Total	733	1492	2225	30.9	19.1