Table 2. Age distribution of patients studied.

Age in years	Group A		Group B		Group C
	No.	%	No.	%	No.	%
<40	19	18.2	32	32.0	29	29.0
40–50	35	33.6	42	42.0	26	26.0
50–60	28	29.0	22	22.0	21	21.0
60–70	16	15.2	3	3.0	23	23.0
>70	6	5.0	1	1.0	1	1.0
Total	104	100.0	100	100.0	100	100.0
Median ±SE	48.5±1.05		42 ±0.7		45.0±1.0