Volume 8, Number 7—July 2002
Research
Persistent High Incidence of Tuberculosis in Immigrants in a Low-Incidence Country
Troels Lillebaek*
, Åse B. Andersen†, Asger Dirksen‡, Else Smith*, Lene T. Skovgaard§, and Axel Kok-Jensen‡
, Åse B. Andersen†, Asger Dirksen‡, Else Smith*, Lene T. Skovgaard§, and Axel Kok-Jensen‡
Table 1
Number of Somalis in Denmark and cases of Somali immigrants reported as having tuberculosis, 1991–2000
| Year | a |
b |
c |
d |
e |
|---|---|---|---|---|---|
| Somalis in Denmarka (no.) | Net arrivalb (no.) (an+1-an) | Person-observation years yrs (a + 1/2b) | Reported casesc (no.) | Crude rated (d as % of c) (95% CI) | |
| 1991 and earlier | 743 | 652 | 1,069 | NA | NA |
| 1992 | 1,395 | 842 | 1,816 | 20 | 1.1 (0.7 to 1.7) |
| 1993 | 2,237 | 1,552 | 3,013 | 41 | 1.4 (1.0 to 1.9) |
| 1994 | 3,789 | 1,491 | 4,535 | 92 | 2.0 (1.7 to 2.5) |
| 1995 | 5,280 | 1,811 | 6,186 | 100 | 1.6 (1.3 to 2.0) |
| 1996 | 7,091 | 2,794 | 8,488 | 114 | 1.3 (1.1 to 1.6) |
| 1997 | 9,885 | 2,228 | 10,999 | 182 | 1.7 (1.4 to 1.9) |
| 1998 | 12,113 | 1,422 | 12,824 | 167 | 1.3 (1.1 to 1.5) |
| 1999 | 13,535 | 1,321 | 14,196 | 185 | 1.3 (1.1 to 1.5) |
| 2000 | 14,856 | NA | NA | NA | NA |
aNumber of Somalis in Denmark by January 1.
bEstimated number of Somalis arriving in Denmark in 1 year.
cSomalis reported as having tuberculosis (TB).
dCrude incidence rate as % of the accumulated number of Somalis in Denmark; NA = not available; 95% CI = 95% confidence interval.
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