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Table 2 Baseline demographics and clinical variables, stress-echocardiography and invasive coronary angiograms data in the entire population and in the subgroups with or without obstructive coronary artery disease > 50%

From: Equivocal tests after contrast stress-echocardiography compared with invasive coronary angiography or with CT angiography: CT calcium score in mildly positive tests may spare unnecessary coronary angiograms

  Entire population (n = 314) CAD > 50% (n = 241) No CAD > 50% (n = 73) p
Age, median (IQR) 66 (17) 67 (15) 63 (16) 0.005
Male Gender (%) 229 (73%) (57%) 186 (77%) 43 (59%) 0.002
Hypertension (%) 227 (72%) 183 (76%) 44 (60%) 0.008
Family history of CAD (%) 93 (30%) 72 (30%) 21 (29%) 0.855
Smoking (%) 120 (38%) 99 (41%) 21(29%) 0.057
Hypercolesterolemia (%) 188 (60%) 152 (63%) 36 (49%) 0.035
Diabetes mellitus (%) 71 (23%) 63 (26%) 8 (11%) 0.006
Prior Miocardial infarction 73 (23%) 62 (26%) 11 (15%) 0.059
Coronary stenosis >50% 241 (77%) 241 (100%) 0
At least one stenosis more than 70% 222 (71%) 222 (92%) 0
Any reversible WM abnormality 206 (66%) 172 (71%) 35 (48%) 0.0002
More than mild reversible WM abnormality (>0.06) 164 (52%) 146 (61%) 18 (25%) <0.0001
Reversible myocardial perfusion abnormality 136/176 (77%)a 105/130 (81%)a 31/46 (67%)a 0.063
CFR-LAD < 2 110/208 (53%)a 87/151 (58%)a 23/57 (40%)a 0.026
Normal WM + normal or unavailable myocardial perfusion and CFR-LAD 59 (19%) 44 (18%) 15 (20%) 0.66
  1. CAD coronary artery disease, IQR interquartile range, WM wall motion, CFR-LAD coronary flow reserve of the left anterior descending coronary artery
  2. aMyocardial perfusion and CFR-LAD percentages are related to the total number of patients in whom such variables could actually be technically measured