Variable

Percentage (%)

OR (95% CI)

p-value

Age ≤ 24 years

Yes

23.2

0.8 (0.5 - 1.2)

0.292

No

27.3

1

Female

Yes

25.9

1.1 (0.7 - 1.6)

0.703

No

24.4

1

FHS-UB

Yes

36.6

3.0 (2.0 - 4.5)

<0.001*

No

17.9

1

Level 7

Yes

26.8

1.2 (0.8 - 1.8)

0.399

No

23.5

1

Lecture on RHD

Yes

27.3

3.1 (1.4 - 7.0)

0.004*

No

10.8

1

≥2 lectures on RHD

Yes

30.2

1.0 ( 0.7 - 1.6)

0.855

No

24.8

1

History of sore throat

Yes

27.3

2.1 (1.1 - 3.9)

0.015*

No

15.2

1

History of ARF

Yes

15.0

0.5 (0.1 - 1.8)

0.286

No

25.6

1