Table 3B

Determinants of high confidence in precise recognition of heart attack

Variables	Univariate models		Multivariate models
	Univariate models		Model 1		Model 2
	OR 95% CI	P value	OR 95% CI	P value	OR 95% CI	P value
Age	0.99 (0.97 to 1.02)	0.57	0.99 (0.96 to 1.03)	0.69	0.99 (0.96 to 1.02)	0.61
Male	0.72 (0.32 to 1.59)	0.41	0.6 (0.24 to 1.52)	0.28	0.63 (0.25 to 1.59)	0.33
Obesity (BMI >25 kg/m²)	1.20 (0.68 to 2.13)	0.53	1.5 (0.78 to 2.88)	0.23	1.35 (0.71 to 2.56)	0.36
High school graduation or less	1.12 (0.63 to 1.98)	0.70	0.68 (0.36 to 1.31)	0.25	0.82 (0.43 to 1.54)	0.53
Hypertension	1.54 (0.73 to 3.25)	0.25	1.37 (0.61 to 3.11)	0.45	1.36 (0.60 to 3.06)	0.46
Dyslipidaemia	1.99 (0.96 to 4.12)	0.07	1.46 (0.66 to 3.19)	0.35	1.43 (0.65 to 3.15)	0.38
Diabetes mellitus	0.74 (0.41 to 1.33)	0.31	0.63 (0.33 to 1.20)	0.16	0.58 (0.31 to 1.11)	0.10
Previous MI	2.10 (1.14 to 3.83)	0.02	2.51 (1.29 to 4.91)	0.007
Previous PCI	2.04 (1.15 to 3.62)	0.02			2.04 (1.09 to 3.80)	0.03

Standard covariates=age, male sex, obesity, education level, coronary risk factors (hypertension, dyslipidaemia, diabetes mellitus).
Model 1=standard covariates+previous MI.
Model 2=standard covariates+previous PCI.
BMI, body mass index; MI, myocardial infarction; PCI, percutaneous coronary intervention.