Table 2.

Distribution of cases according to age

	Age group				Total	Pearson chi square
	20–24	25–29	30–34	35–39		p value
Group I
Count	24	53	19	3	99	0.624
% Within group	24.20	53.53	19.20	3.00	100.00
Group II
Count	7	9	5	0	21
% Within group	33.30	42.80	23.80	0.00	100.00
Total
Count	31	62	24	3	120
% Within group	25.80	51.50	20.00	2.50	100.00