A new scoring system to stratify risk in unstable angina

Table 2 Results of the univariate analysis

Variable	Composite end-point		χ²	p	OR	95%CI
	Present (%)	Absent (%)
Age (mean ± SD)	68.8 ± 11.3	62.7 ± 11.6		0.0002
Age ≥ 70 y	56.9	30.4	16.06	0.00006	3.03	1.66 – 5.53
Male sex	60.3	67.7	1.25	0.26	0.73	0.40 – 1.33
Hypertension	67.2	68.9	0.07	0.79	0.93	0.40 – 1.75
Diabetes	20.7	18.3	0.19	0.66	1.16	0.55 – 2.42
Smokers	29.3	43.1	3.46	0.06	0.55	0.29 – 1.04
Hypercholesterolemia	62.1	56.9	0.56	0.45	1.24	0.68 – 2.28
Previous MI	39.7	29.2	2.65	0.10	1.60	0.87 – 2.93
Previous PCI	13.8	12.8	0.05	0.82	1.09	0.45 – 2.58
Previous CABG	25.9	10.8	10.36	0.001	2.87	1.39 – 5.87
Medication before admission
Aspirin	75.9	58.5	6.46	0.011	2.23	1.14 – 4.45
Beta-blockers	50.0	41.8	1.40	0.23	1.39	0.77 – 2.52
Nitrates	32.8	20.0	4.85	0.02	1.94	1.02 – 3.7
ACE-inhibitors	25.9	27.5	0.07	0.78	0.92	0.46 – 1.79
ECG changes
T wave inversion	13.8	31.1	7.39	0.006	0.35	0.15–0.81
ST deviation	63.8	25.5	34.97	0.000001	5.1	2.74 – 9.55
Biochemical markers
Positive troponin test	41.4	21.0	11.81	0.0005	2.66	1.43 – 4.93
C R P ≥ 3 mg/L	61.7	58.0	0.29	0.58	1.34	0.75 – 2.39
C R P ≥ 10 mg/L	41.7	31.1	2.72	0.09	1.56	0.86 – 2.83

ACE = angiotensin converting enzyme; CABG = coronary artery bypass grafting; CRP = C-reactive protein; MI = myocardial infarction; PCI = percutaneous coronary intervention; χ² = chi-square.

ISSN: 1471-2261