Involved factors Table 3.2: Distribution by age group (n = 405) Age group n% <40 17 4, 2 40 - 49 30 7, 4 50 - 59 88 21, 7 60 - 69 124 30, 6 ≥70 146 36 Total 405 100 Conclusion: Results at table 3.2 show that the group of patients over 70 age occupies the highest rate (36%).