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Volume 9, Number 10—October 2003

Dispatch

Mycobacterium tuberculosis Beijing Genotype, the Netherlands

Martien W. Borgdorff*†Comments to Author , Petra de Haas‡, Kristin Kremer‡, and Dick van Soolingen‡
Author affiliations: *Royal Netherlands Tuberculosis Association, the Hague, the Netherlands; †University of Amsterdam, Amsterdam, the Netherlands; ‡National Institute of Public Health and the Environment (RIVM), the Hague, the Netherlands

Main Article

Table

Risk factors for the Beijing genotype of Mycobacterium tuberculosis, the Netherlands, 1993–2000

Risk factor Beijing genotype Total (%) Odds ratio
Crude Adjustedb (95% confidence intervals)
Y of diagnosis
1993
23
669
3
1.09
1.08 (1.03 to 1.13)
1994
41
941
4
(per year)
1995
56
863
6


1996
50
946
5


1997
64
872
7


1998
58
804
7


1999
74
879
8


2000
49
855
6


Sex
Male
254
4,135
6
1

Female
161
2,694
6
0.97

Age group
<25
120
1,522
8
1
1
25–34
123
1,925
6
0.80
0.69 (0.53 to 0.91)
35–44
64
1,080
6
0.74
0.60 (0.43 to 0.83)
45–54
23
614
4
0.45
0.36 (0.23 to 0.57)
55–64
24
493
5
0.60
0.55 (0.35 to 0.88)
65–74
40
517
8
0.98
0.78 (0.52 to 1.15)
75+
21
678
3
0.37
0.30 (0.18 to 0.50)
Nationality
Netherlands
160
2,825
6
1
1
Europe (central and eastern)
20
231
9
1.58
1.27 (0.77 to 2.09)
Turkey
3
339
1
0.15
0.12 (0.04 to 0.38)
Morocco
19
650
3
0.50
0.41 (0.25 to 0.68)
Somalia
21
957
2
0.37
0.27 (0.17 to 0.44)
Africa (other)
28
594
5
0.82
0.63 (0.41 to 0.96)
Asia
140
786
18
3.61
3.01 (2.32 to 3.91)
Other
19
345
6
0.97
0.86 (0.53 to 1.42)
Unknown
5
102
5
0.86
0.73 (0.29 to 1.84)
RFLP clusteringa
No
212
3,227
7
1

Yes, first case
57
1,052
5
0.81

Yes, later case
146
2,550
6
0.86

Localization
Pulmonary
268
4,064
7
1

Extrapulmonary
113
2,122
5
0.80

Pulmonary and extrapulmonary
34
643
5
0.79

Residing in Netherlands
<6 months
46
641
7
1

6–11 mo
12
301
4
0.54

12–23 mo
28
358
8
1.10

2–4 y
53
767
7
0.96

>5 y
122
1,710
7
0.99

Born in Netherlands
117
2,437
5
0.65

No information
37
615
6
0.83

Drug resistance
Susceptible
332
5,910
6
1

H only
11
227
5
0.86

S only
34
358
9
1.76

Other patterns
26
221
12
2.24

Multidrug-resistant
9
53
17
3.44

Unknown
3
60
5
0.88

Multidrug resistance
Yes
9
53
17
3.21
2.64 (1.22 to 5.74)
No
406
6,776
6
1
1
HIV infection
Yes
14
294
5
0.76

No 401 6,535 6 1

aRFLP, restriction fragment length polymorphism.

bAdjusted for year of diagnosis, age, nationality, and multidrug resistance

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