Table 2 Frequency, odds ratio(OR) and 95%CI (confidence interval) for different risk factors of abnormal biochemical liver function estimated from multiple regression logistic model after adjustment for age, gender, and education level

>=37/<37 OR (95% CI)

>=37/<37 OR(95% CI)

>=61/<61 OR(95% CI)

Ethnic group

Non-Aboriginal

68/868

1.0

66/870

1.0

84/852

1.0

   Aboriginal

340/1724

1.4(1.2–1.7)

429/1635

1.3(1.1–2.2)

590/1472

1.5(1.2–2.9)

Alcohol drinking

   Never

113/1402

1.0

85/1430

1.0

97/1417

1.0

   Former

16/127

1.1(0.6–2.0)

14/129

1.0(0.5–1.9)

16/129

1.0(0.5–1.9)

   Current

279/1068

1.7(1.2–2.2)

396/951

3.1(2.4–4.3)

561/951

4.7(3.3–6.0)

Cigarette smoking

   Never

160/1666

1.0

156/1670

1.0

214/1612

1.0

   Former

19/76

1.4(0.8–2.2)

22/73

1.7(1.2–3.1)

27/68

1.1(0.6–16)

Current

229/1068

1.4(1.1–1.8)

317/766

1.8(1.3–2.2)

433/649

1.6(1.2–2.1)

Betel quid chewing

   No

117/1584

1.0

129/1613

1.0

154/1857

1.0

   Yes

282/1117

1.5(1.1–1.8)

246/983

1.3(1.1–1.7)

136/527

0.7(0.5–1.1)

Gender

Female

117/1439

1.0

139/1417

1.0

167/1387

1.0

Male

291/1158

1.7(1.5–2.3)

356/1093

1.6(1.2–2.0)

507/942

2.0(1.9–2.9)

BMI

   <=25

214/1659

1.0

326/1547

1.0

374/1499

1.0

   >25

193/929

1.9(1.5–2.4)

167/955

1.0(0.7–1.1)

295/825

1.9(1.5–2.3)

HBV/HCV

-/-

232/971

1.0

299/1904

1.0

470/1731

1.0

+/-

132/496

1.8(1.4–2.3)

148/480

1.7(1.3–2.2)

148/480

0.8(0.6–1.0)

-/+

27/49

3.7(3.2–9.2)

26/50

3.1(2.1–6.2)

25/51

2.0(1.3–4.4)

+/+

5/5

4.2(1.2–17.4)

5/5

3.8(1.0–14.1)

6/4

2.3(0.7–11.0)