Estimating the effect of lay knowledge and prior contact with pulmonary TB patients, on health-belief model in a high-risk pulmonary TB transmission population

Figures & data

Table 1 Participants’ characteristics (N=500)

Sociodemographic factors	%	% Missing
Age group (years)		0.00
18–30	29.6
31–39	22.0
40–47	24.6
48–65	23.8
Gender		2.4
Female	67.0
Male	33.0
Education level		0.00
No qualification	6.4
Elementary school	30.6
Junior high school	23.8
Senior high school	34.4
Diploma	1.4
Undergraduate	3.4
Income level
<Rp1.000.000	45.2	1.00
Rp1.000.000–Rp1.500.000	25.4
Rp1.500.001–Rp2.000.000	8.6
Rp2.000.001–Rp2.500.000	10.4
Rp2.500.001–Rp4.000.000	6.2
>Rp4.000.000	3.2
Occupation
Police/military officer	0.2	0.4
Civil servant	1.2
Private sector employee	19.2
Entrepreneur	3.0
Professional	2.0
Street vendor	22.6
Student	2.0
Housewife	28.4
Not working	15.6
Others	5.4
Ethnicity
Javanese	57.0	0.2
Madurese	40.0
Chinese	1.2
Others	1.6
Past experience of direct interaction with pulmonary
TB patients
Yes	42.6	0.6
No	56.8

Abbreviation: TB, tuberculosis.

Table 2 Social determinants of lay knowledge of pulmonary TB

Determinants	β	SE	df	p-value	aOR	95% CI
						Lower	Upper
Age	0.061	0.012	1	0.000*	1.063	1.038	1.089
Being a female	1.418	0.258	1	0.000*	4.127	2.489	6.843
Education level	–	–	5	0.194	–	–	–
Ethnicity	–	–	3	0.464	–	–
Interacting with TB patients	0.979	0.220	1	0.000*	2.661	1.728	4.097
Income level	–	–	5	0.204	–	–	–
Constant	−5.550	0.926	1	0.000	0.004	–	–

Notes: A binary logistic regression, good knowledge=1, poor knowledge=0, Nagelkerke R²=0.223.

* p<0.05.

Abbreviations: b, coefficient; SE, standard error; aOR, adjusted odd ratio; TB, tuberculosis.

Table 3 Determinant of belief in a personal health threat (N=500)

Variables	β	SE	F-test	p-value	aR^2	VIF
Model 1: Belief in a personal health threat
Constant	4.962	0.071	16.497	0.000*	0.059	1.071
Knowledge	0.057	0.011		0.000*
Previous contact	0.053	0.060		0.379
Model 2: Perceived susceptibility
Constant	2.373	0.048	1.651	0.000*	0.003	1.072
Knowledge	0.012	0.007		0.117
Previous contact	0.019	0.041		0.635
Model 3: Perceived severity
Constant	2.589	0.045	24.930	0.000*	0.088	1.071
Knowledge	0.045	0.007		0.000*
Previous contact	0.032	0.038		0.400

Notes: Model 1: IV=knowledge, previous contact, DV=belief in a personal health threat. Model 2: IV=knowledge, previous contact, DV=perceived susceptibility. Model 3: IV=knowledge, previous contact, DV=perceived severity.

* p<0.05.

Abbreviations: b, coefficient; SE, standard error; aR², adjusted R²; VIF, multicollinearity test.

Table 4 Determinant of belief in the effectiveness of health behavior (N=500)

Variables	β	SE	F-test	p-value	aR^2	VIF
Model 1: Belief in the effectiveness of health behavior
Constant	0.271	0.065	29.778	0.000*	0.104	1.072
Knowledge	0.061	0.010		0.000*
Previous contact	0.160	0.055		0.004*
Model 2: Perceived benefits
Constant	2.878	0.045	21.874	0.000*	0.078	1.072
Knowledge	0.042	0.007		0.000*
Previous contact	0.031	0.038		0.413
Model 3: Perceived barriers
Constant	2.607	0.043	13.665	0.000*	0.049	1.072
Knowledge	−0.019	0.007		0.000*
Previous contact	−0.129	0.037		0.000*

Notes: Model 1: IV=knowledge, previous contact, DV=belief in the effectiveness of health behavior. Model 2: IV=knowledge, previous contact, DV=perceived benefits. Model 3: IV=knowledge, previous contact, DV=perceived barriers.

* p<0.05.

Abbreviations: b, coefficient; SE, standard error, aR², adjusted R²; VIF, multicollinearity test.