Table 1.

Distribution of cases according to the environment of origin, and cases according to age.

Environment of Origin		Total		Group 1		Group 2
		N	%	N	%	N	%
Rural		96	48.0	8	53.3	96	51.9
Urban		104	52.0	7	46.6	89	48.1
Total		200	100.0	15	7.5	185	92.5
Age	<60 years	36	18.0	5	33.3	31	16.7
	61–70 years	104	52.0	7	46.6	97	52.4
	>70 years	60	30.0	3	20	57	30.8
Min-max		46–82
Mean age		67.43 ± 7.94		68.03 ± 8.09		66.91 ± 7.81

N—total number of patients; Min-max—minimum and maximum value.