The rate of asthma patients by age group: Age group Hong Thai (n=200) Quoc Tuan (n=255) Total (n=455) Investigate Patient (%) Investigate Patient (%) Investigate Patient% 16 - 19 400 1 0, 3 384 1 0, 3 784 2 0, 3 20 - 29 1.081 4 0, 4 1.506 15 1, 0 2.587 19 0, 7 30 - 39 1.030 17 1, 7 1.331 21 1, 6 2.361 38 1, 6 40 - 49 1.179 43 3, 6 1.122 41 3, 7 2.301 84 3, 7 50 - 59 894 57 6, 4 1.163 63 5, 4 2.057 120 5, 8 60 - 69 369 43 11, 7 448 40 8, 9 817 83 10, 2 70 - 79 238 28 11, 8 368 42 11, 4 606 70 11, 5 ≥ 80 132 7 5, 3 327 32 9, 8 459 39 8, 5 Total 5.323 200 100 6.649 255 100 12.553 455 100 Comment: The disease occurs at all ages, high incidence of asthma in the age group over 60.