Table 4 Sensibility, specificity, positive predictive value and negative predictive value of risk factors questions for hepatitis B virus positivity, hepatitis C virus positivity and hepatitis B or hepatitis C positivity

Major surgery/bleeding prior 1992

15.2

84.9

8.8

91.3

0.0

84.6

0.0

98.4

13.9

84.7

8.8

90.3

[2.9-27.4]

[81.1-88.7]

[1.4-16.1]

[88.2-94.3]

[81.0-88.3]

[97.1-99.8]

[2.6-25.2]

[80.9-88.5]

[1.4-16.1]

[87.0-93.5]

Acupuncture, tattoo or piercing without disposable devices

12.5

85.2

7.3

91.3

40.0

85.7

3.6

99.1

14.3

85.3

9.1

90.6

[1.0-24.0]

[81.4-88.9]

[0.4-14.1]

[88.2-94.4]

[0.0-82.9]

[82.1-89.2]

[0.0-8.6]

[98.0-100]

[2.7-25.9]

[81.5-89.1]

[1.5-16.7]

[87.4-93.8]

Icterus

12.1

93.0

14.3

91.7

40.0

93.0

7.1

99.1

13.9

93.2

17.9

91.1

[1.0-23.3]

[90.3-95.7]

[1.3-27.2]

[88.8 -94.6]

[0.0-82.9]

[90.4-95.6]

[0.0-16.7]

[98.2-100.0]

[2.6-25.2]

[90.6-95.9]

[3.7-32.0]

[88.1-94.1]

Liver disease other than cancer

18.2

95.1

26.1

92.7

60.0

94.6

13.0

94.9

22.2

95.6

34.8

92.1

[5.0-31.3]

[92.8-97.3]

[8.1-44.0]

[89.6 -95.1]

[17.1-100.0]

[92.3-96.9]

[0.0-26.8]

[92.6-97.1]

[8.6-35.8]

[93.4-97.8]

[15.3-54.2]

[89.2-94.9]

Transfusion prior 1992

3.0

94.4

5.0

91.0

0.0

94.6

0.0

98.6

2.8

94.4

5.0

90.1

[0.0-8.9]

[92.0-96.9]

[0.0-14.6]

[88.0-94.0]

[92.3-96.9]

[97.4-99.8]

[0.0-8.1]

[91.9-96.8]

[4.6-14.6]

[87.0-93.2]

Relatives with viral hepatitis

6.1

95.3

11.1

91.4

0.0

95.1

0.0

98.6

5.6

95.3

11.1

90.5

[0.0-14.2]

[93.1-97.6]

[0.0-25.6]

[88.5 -94.3]

[93.0-97.3]

[97.4-99.8]

[0.0-13.0]

[93.0-97.5]

[0.0-25.6]

[87.5-93.5]

Grand prematurity or serious health problem at birth

0.0

96.2

0.0

90.9

0.0

96.5

0.0

98.6

0.0

96.2

0.0

97.6

[94.2-98.2]

[88.0-93.9]

[94.6-98.4]

[97.4-99.8]

[94.1-98.2]

[95.9-99.2]

Birth or medical care in countries at risk

3.0

97.4

10

91.3

0.0

97.3

0.0

98.9

2.8

97.4

10

90.4

[0.0-8.9]

[95.7-99.1]

[0.0-28.6]

[88.4-94.2]

[95.7-99.0]

[97.4-99.8]

[0.0-8.1]

[95.6-99.1]

[0.0-28.6]

[87.4-93.5]

Transplantation prior 1992

0.0

98.3

0.0

91.1

0.0

98.4

0.0

98.6

0.0

98.2

0.0

90.2

[96.9-99.6]

[88.2-94.0]

[97.1-99.7]

[97.5-99.8]

[96.8-99.6]

[87.2-93.3]

Blood derived product prior 1988

3.0

98.8

20.0

91.4

20

98.9

20

98.9

2.9

98.8

2

90.5

[0.0-8.9]

[97.7-100.0]

[0.0-55.1]

[88.5-94.2]

[0.0-55.1]

[97.9-100]

[0.0-55.1]

[97.9-100.0]

[0.0-8.4]

[97.7-100]

[0.0-55.1]

[87.6-93.5]

Hemodialysis

0.0

99.4

0.0

91.2

0.0

99.5

0.0

98.7

0.0

99.4

0.0

90.4

[98.6-100.0]

[88.3 -94.1]

[98.7-100.0]

[97.5-99.8]

[98.6-100.0]

[87.4-93.4]

Intravenous drug

3.0

100.0

100.0

91.5

0.0

99.7

0.0

98.7

2.8

100.0

100.0

90.7

[0.0-8.9]

[88.7 -94.3]

[99.2-100.0]

[97.5-99.8]

[0.0-8.1]

[87.7-93.6]

Human Immunodeficiency Virus +

0.0

99.7

0.0

91.2

0.0

99.7

0.0

98.7

0.0

99.7

0.0

90.4

[97.1-100.0]

[88.3-94.1]

[99.2-100.0]

[97.5-99.8]

[99.1-100.0]

[87.4-93.4]

One or more risk factor

45.5

56.4

9.1

91.5

100.0

56.9

3.0

100.0

50.0

56.8

10.9

91.5

[28.5-62.4]

[51.2-61.6]

[4.7-13.5]

[87.8-95.3]

[51.8-61.9]

[0.4-5.6]

[33.7-66.3]

[51.5-62.0]

[6.2-15.7]

[87.7-95.2]