Table 5 Associations of knowledge of Orang Asli participants about intestinal helminths with family size and household monthly income

–Heard about worms

67(63.2)

65(59.6)

1.1

0.7, 2.0

43(66.2)

89(59.3)

1.3

0.7, 2.5

Signs and symptoms:

–At least one symptom

36(34.0)

27(24.8)

1.6

0.9, 2.8

24(36.9)

39(26.0)

1.7

0.9, 3.1

–Abdominal pain

12(15.4)

9(6.6)

2.5

1.0, 6.4*

12(18.5)

9(6.0)

3.5

1.4, 8.7*†

–Abdominal distension

9(11.3)

12(8.3)

1.4

0.5, 3.4

7(10.8)

14(9.3)

1.2

0.5, 3.1

–Vomiting

10(12.8)

5(3.6)

3.8

1.3, 9.8*

5 (7.7)

10(6.7)

1.2

0.4, 3.5

–Diarrhoea

11(14.1)

8(5.8)

2.6

1.1, 6.8*

7 (10.8)

12 (8.0)

1.4

0.5, 3.7

–Lack of appetite

8(7.3)

8(7.5)

1.0

0.4, 2.8

5 (7.7)

11(7.3)

1.1

0.4, 3.1

–Pale face

7(9.0)

5(3.6)

2.1

0.7, 7.3

2 (3.1)

10(6.7)

0.4

0.1, 2.1

Transmission:

–At least one way of transmission

26(24.5)

35(32.1)

0.7

0.3, 1.2

25(38.5)

36(24.2)

2.0

1.1, 3.7*

–Playing with soil

5(6.4)

7(5.1)

1.3

0.4, 4.1

4(6.2)

8(5.3)

0.9

0.2, 2.9

–Stagnant water

4(5.1)

10(7.3)

0.7

0.2, 2.2

5(7.7)

9(6.0)

1.3

0.4, 3.7

–Dirty hands

7(6.6)

8(7.3)

0.9

0.3, 2.6

7(10.8)

8(5.3)

2.1

0.7, 5.7

–Walking barefooted

7(6.6)

8(7.3)

0.9

0.3, 2.6

6(9.2)

9(6.0)

1.6

0.5, 4.6

–Eating contaminated food

6(5.7)

11(10.1)

0.5

0.2, 1.5

10(15.4)

7(4.7)

3.7

1.3, 9.7*†

Prevention:

–At least -one preventive measure

18(23.1)

17(12.4)

2.1

1.0, 4.4*

17(26.2)

18(12.0)

2.6

1.2, 5.4*

–Washing hands before eating

6(5.7)

10(9.2)

0.6

0.2, 1.7

9(13.8)

7(4.7)

3.2

1.2, 9.2*

–Wearing shoes when outside the house

7(6.6)

6(5.5)

1.2

0.4, 3.7

6(9.2)

7(4.7)

2.1

0.7, 6.4

–Taking de-worming drugs

12(11.3)

6(5.5)

2.2

0.8, 6.1

8(12.3)

10(6.7)

1.9

0.7, 5.2