Age group (in years)

Frequency

Percentage (%)

<20

9

1.8

21 - 30

130

26.1

31 - 40

186

37.3

41 - 50

104

20.8

51 - 60

46

9.2

61 - 70

21

4.2

>70

3

0.6

Mean ± SD

38.6 ± 11.4

Sex

Male

308

61.7

Female

191

38.3

Male:Female ratio

1.6:1