Distribution of patients with psoriasis by age subgroups (n=130) Age group n% <20 9 6, 92 20 - 29 10 7, 69 10 30 - 39 15 11, 54 40 - 49 12 9, 23 50 - 59 33 25, 38 60 - 69 33 25, 38 ≥70 18 13, 85 Tổng 130 100 X± SD 50, 89 ± 17, 86 Conclusion: Age group of 50 - 59 and 60 - 69 were the most common group, accounting for 25, 38%, age < 20 was the lowest 6.92%.