Table 2 Univariable and multivariable risk factors for secondary Shigella transmission to 337 contacts within 102 households*, Amsterdam, The Netherlands 2002–2009

337

25

7.4

n/a

n/a

n/a

n/a

n/a

n/a

n/a

n/a

≥ 6 years

260

17

6.5

ref.

ref.

ref.

ref.

ref.

ref.

ref.

ref.

0–3

48

3

6.3

1.0

0.3

3.3

0.943

1.0

0.3

3.2

0.979

4–5

29

5

17.2

2.6

1.0

6.8

0.046

1.3

0.6

3.0

0.527

Female

171

17

9.9

ref.

ref.

ref.

ref.

Male

166

8

4.8

0.5

0.2

1.2

0.109

Netherlands / Other Western

97

7

7.2

ref.

ref.

ref.

ref.

Other

236

18

7.6

1.1

0.5

2.3

0.890

No

228

5

2.2

ref.

ref.

ref.

ref.

ref.

ref.

ref.

ref.

Yes

87

20

23.0

10.5

3.7

29.9

<0.001

8.0

2.7

23.8

<0.001

No

336

24

7.1

ref.

ref.

ref.

ref.

Yes

1

1

100.0

-

-

-

-

2–4 persons (in 61 households)

128

5

3.9

ref.

ref.

ref.

ref.

ref.

ref.

ref.

ref.

5–6 persons (in 24 households)

96

5

5.2

1.3

0.4

4.8

0.658

1.4

0.4

4.6

0.570

>6 persons (in 17 households)

113

15

13.3

3.4

1.3

8.7

0.011

3.1

0.9

10.1

0.064

≥ 6 years

218

11

5.1

ref.

ref.

ref.

ref.

ref.

ref.

ref.

ref.

0–3

58

6

10.3

2.1

0.8

5.5

0.152

2.6

1.0

7.1

0.061

4–5

61

8

13.1

2.6

1.2

5.7

0.018

1.9

0.8

4.5

0.163

Female

174

9

5.2

ref.

ref.

ref.

ref.

Male

163

16

9.8

1.9

0.9

4.1

0.103

No

264

21

8.0

ref.

ref.

ref.

ref.

Yes

73

4

5.5

1.0

0.9

1.2

0.405

≤1 week

95

9

9.5

ref.

ref.

ref.

ref.

1–3 weeks

146

8

5.5

0.6

0.2

1.5

0.262

>3 weeks

96

8

8.3

0.9

0.4

2.0

0.761