Table 3 Single variable analysis of risk factors for SARS Co-V infection among hospital staff cases and controls, Hanoi, 2003.

Touched index patient

2.8

0.9–8.5

0.085

9

(41)

9

(20)

Talked to or touched index patient without mask^‡ (ever)

1.9

0.6–5.9

0.363

7

(32)

9

(20)

Came within 1 meter of index patient

9.3

2.8–30.9

<0.001

17

(77)

12

(27)

Came within 1 meter of index patient, without mask^‡ (ever)

5.4

1.8–16.3

0.003

14

(64)

11

(24)

Spoke with index patient

3.5

1.2–10.4

0.028

11

(50)

10

(22)

Entered patient room

20.0

4.1–97.1

<0.001

20

(91)

15

(33)

Spoke with index patient in his room

3.7

1.1–12.6

0.052

8

(36)

6

(13)

Saw (viewed) index patient

14.0

3.6–55.3

<0.001

19

(86)

14

(31)

Visited patient room when patient was not there

3.7

1.3–10.9

0.027

12

(55)

11

(24)

Touched visibly contaminated surface

7.8

2.3–25.9

0.001

12

(55)

6

(13)

Entered general ward

8.0

1.7–38.4

0.005

20

(91)

25

(56)

Other characteristics ^§

Upper respiratory infection w/in prior 6 months

0.2

0.04–0.9

0.039

2

(9)

15

(33)

'Other' non-clinical job^¶

0.2

0.03–0.7

0.011

2

(9)

18

(40)

Direct patient care activities

2.0

0.7–5.6

0.298

13

(59)

19

(42)

Sanitation/kitchen job

2.2

0.7–7.0

0.223

7

(32)

8

(18)