Table 3. Awareness of acute myocardial infarction symptoms by number of symptoms.

Characteristics	Percentage (%)
	≥1	≥2	≥3	≥4	5	6a	Excellent knowledgeb
Total	88.7	78.9	57.5	30.5	10.9	4.5	3.1
Gender
Male	88.7	77.6	54.5	28.1	9.8	4.2	2.9
Female	88.7	80.2	60.3	32.8	11.9	4.8	3.2
P value	0.942	0.002	<0.001	<0.001	0.001	0.154	0.344
Age group, years
20–39	87.9	77.7	56.4	29.7	11.1	4.9	3.6
40–59	94.5	85.7	63.3	33.2	11.6	4.7	3.0
60–79	78.1	67.4	47.5	26.2	8.8	3.6	2.0
P value	<0.001	<0.001	<0.001	<0.001	0.004	0.089	0.004
Education
Less than primary school	66.4	53.2	36.1	17.3	5.7	2.0	0.8
Middle/high school	89.6	79.1	56.6	28.6	9.3	3.9	2.5
College graduate or higher	92.8	84.4	62.9	34.9	13.2	5.6	4.0
Nonresponse/refusal	75.5	65.2	45.7	26.6	13.6	4.9	3.3
P value	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Average monthly household income, 10 000 Won
≤100	72.6	61.5	42.3	21.3	6.7	2.5	1.6
101–300	91.5	81.2	57.7	29.1	10.0	4.1	2.8
301–500	93.6	85.2	63.0	33.7	11.2	5.0	3.7
>500	93.6	85.1	64.7	36.5	15.2	6.3	4.3
Nonresponse/refusal	80.0	68.6	50.6	28.9	11.5	4.7	2.7
P value	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Region of residence
Capital area or metropolitan city	90.1	80.4	58.6	31.5	11.5	4.9	3.3
Province	87.3	77.5	56.3	29.4	10.2	4.2	2.9
P value	<0.001	0.001	0.026	0.021	0.045	0.141	0.194
Hypertension
Yes	87.0	76.2	54.7	29.1	11.0	4.6	2.6
No	89.0	79.4	57.9	30.7	10.8	4.5	3.2
P value	0.024	0.005	0.022	0.236	0.867	0.842	0.239
Diabetes mellitus
Yes	84.3	73.2	52.1	27.9	11.8	3.1	2.0
No	88.9	79.2	57.7	30.6	10.8	4.6	3.1
P value	0.002	0.002	0.019	0.234	0.535	0.133	0.171
Dyslipidemia
Yes	91.8	84.2	57.6	30.0	9.8	4.3	2.9
No	88.4	78.5	57.4	30.5	11.0	4.6	3.1
P value	0.007	<0.001	0.936	0.775	0.324	0.771	0.804
History of AMI
Respondent	96.4	89.8	75.2	47.4	24.8	15.3	13.1
Immediate family	96.1	87.3	65.8	37.0	14.9	7.0	5.1
No	87.8	77.9	56.4	29.5	10.3	4.1	2.7
P value	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
History of AMI among relatives, acquaintances, or neighbors
Yes	96.1	89.0	66.1	35.2	12.2	4.3	2.7
No	87.3	77.0	55.8	29.6	10.6	4.6	3.2
P value	<0.001	<0.001	<0.001	<0.001	0.081	0.647	0.378
Exposure to AMI-related public service announcements or promotional materials
Yes	95.6	88.0	67.3	39.8	14.9	6.4	4.0
No	86.2	75.6	53.9	27.1	9.4	3.9	2.7
P value	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	0.001
Knowledge of AMI
Yes	96.6	88.7	67.0	36.4	12.9	5.4	3.7
No	73.7	60.4	39.4	19.2	7.1	3.0	1.8
P value	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Being aware of the need for prompt treatment for AMI
Yes	91.3	81.8	59.8	31.9	11.4	4.8	3.3
No	61.1	48.7	32.1	14.9	5.0	2.1	1.2
P value	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001	0.001

AMI, acute myocardial infarction.

^aIncludes all five symptoms (a response of “Yes”) and the trap question (a response of “No” or “I do not know” to the trap question was counted).

^bIncludes five symptoms of AMI (a response of “Yes”), the trap question (a response of “No” or “I do not know” to the trap question was counted), and appropriate response (calling an ambulance).