Table 1. Baseline Characteristics of Patients: Age and Sex Distribution.

Age group	Male (n = 405)	%	Female (n = 144)	%	Total
20 - 30 years	24	6	5	3	29
30 - 40 years	56	14	33	23	89
40 - 50 years	118	29	29	20	147
50 - 60 years	136	33	46	32	182
> 60 years	71	18	31	22	102