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Table 3 Comparison of cardiovascular risk factors among patient groupsa

From: Risk stratification of patients in an emergency department chest pain unit: prognostic value of exercise treadmill testing using the Duke score

Risk factor All study groups Duke score group Exercise treadmill test Alternative stress test
Low risk (n = 454) Moderate/high risk (n = 145) No (n = 201) Yes (n = 599) No (n = 113) Yes (n = 88)
Age at evaluation, years
 Mean 56.5 52 60 64.4 53.9 62.1 67.4
 Median (range) 55 (19-94) 51 (21-89) 60 (20-87) 67.0 (19-94) 53.0 (20-89) 65.0 (19-93) 71.5 (30-94)
Sex, no. of patients (%)
 Female 361 (45.1) 186 (41.0) 78 (53.8) 97 (48.3) 264 (44.1)b 50 (44.2) 47 (53.4)b
 Male 439 (54.9) 268 (59.0) 67 (46.2) 104 (51.7) 335 (55.9)b 63 (55.8) 41 (46.6)b
Family history of cardiovascular disease, no. of patients (%) 92 (11.5) 51 (11.2) 23 (15.9)b 18 (9.0) 74 (12.4)b 13 (11.5) 5 (5.7)b
History of, no. of patients (%)
 Smoking 170 (21.3) 93 (20.5) 34 (23.4)b 43 (21.4) 127 (21.2)b 28 (24.8) 15 (17.0)b
 Hypertension 318 (39.8) 141 (31.1) 68 (46.9) 109 (54.2) 209 (34.9) 59 (52.2) 50 (56.8)b
 Diabetes mellitus 88 (11.0) 29 (6.4) 20 (13.8) 39 (19.4) 49 (8.2) 20 (17.7) 19 (21.6)b
 Hypercholesterolaemia 340 (42.5) 160 (35.2) 77 (53.1) 103 (51.2) 237 (39.6) 62 (54.9) 41 (46.6)b
Previous myocardial infarction, no. of patients (%) 69 (8.6) 23 (5.1) 12 (8.3)b 34 (16.9) 35 (5.8) 22 (19.5) 12 (13.6)b
  1. aOn the basis of univariate analyses of patients undergoing exercise treadmill testing, those with the following characteristics were significantly more likely to have moderate or high Duke score: older age, female, hypertension, diabetes mellitus or hypercholesterolaemia
  2. bDifference is not statistically significant (P > .05)