Table 1 Numbers of asthmatics, person-years and incidence of asthma by onset age, birth cohort and sex
From: Asthma incidence, remission, relapse and persistence: a population-based study in southern Taiwan
| Â | No. of cases/No. at risk | Person-years | Incidence (95% C.I.)/1000 person-years |
|---|---|---|---|
Whole sample | 860/25,377 | 949,807 | 0.91 (0.85 ~ 0.97) |
Onset age (years) | Â | Â | Â |
0-6 | 161/25,377 | 177,639 | 0.91 (0.78 ~ 1.06) |
7-12 | 151/25,377 | 152,262 | 0.99 (0.85 ~ 1.16) |
13-15 | 50/25,377 | 76,131 | 0.66 (0.50 ~ 0.87) |
16-18 | 39/25,377 | 76,131 | 0.51 (0.37 ~ 0.70) |
19-25 | 80/25,377 | 177,639 | 0.45 (0.36 ~ 0.56) |
26-30 | 103/24,767 | 123,835 | 0.83 (0.69 ~ 1.01) |
31-35 | 152/21,006 | 105,030 | 1.45 (1.23 ~ 1.70) |
36-40 | 124/12,228 | 61,140 | 2.03 (1.70 ~ 2.42) |
Birth cohort (age in years) | Â | Â | Â |
1978-1969 (26-35) | 220/5,771 | 182,851 | 1.20 (1.05 ~ 1.37) |
1968-1964 (36-40) | 349/9,371 | 347,321 | 1.01 (0.91 ~ 1.12) |
1963-1959 (41-45) | 201/7,273 | 298,193 | 0.67 (0.59 ~ 0.77) |
1958-1948 (46-56) | 90/2,962 | 121,442 | 0.74 (0.60 ~ 0.91) |
Sex | Â | Â | Â |
Male | 300/10,016 | 387,436 | 0.77 (0.69 ~ 0.87) |
Female | 560/15,361 | 562,371 | 1.00 (0.92 ~ 1.08) |