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Table 1 Baseline demographic characteristics

From: Physiological benefits evaluated by quantitative flow ratio in patients with reduced left ventricular ejection fraction who underwent percutaneous coronary intervention

  Reduced LVEF group
(n = 48)
Normal LVEF group
(n = 253)
P value
Clinical characteristics    
Age, years 63.69 ± 8.10 63.03 ± 9.60 0.676
Male, n (%) 42 (87.5%) 197 (77.9%) 0.130
Hypertension, n (%) 31 (64.6%) 171 (67.6%) 0.684
Diabetes, n (%) 24 (50.0%) 77 (30.4%) 0.008
Prediabetes, n (%) 0 (0.00%) 7 (2.8%) 0.520
Normoglycaemic, n (%) 24 (50.0%) 169 (66.8%) 0.026
Renal insufficiency, n (%) 3 (6.3%) 9 (3.6%) 0.637
Current or previous smoker, n (%) 32 (66.7%) 139 (54.9%) 0.133
Previous myocardial infarction, n (%) 9 (18.8%) 27 (10.7%) 0.114
Previous PCI, n (%) 12 (25.0%) 51 (20.2%) 0.450
Disease types    
Stable angina, n (%) 2 (4.2%) 31 (12.3%) 0.100
Unstable angina, n (%) 14 (29.2%) 172 (68.0%)  < 0.001
Post-NSTEMI (≥ 72 h), n (%) 15 (31.3%) 25 (9.9%)  < 0.001
Post-STEMI (≥ 72 h), n (%) 17 (35.4%) 25 (9.9%)  < 0.001
Laboratory indexes    
Glucose level at admission, mmol/L 6.70 (3.14) 5.54 (1.64) 0.001
Blood LDL level at admission, mmol/L 2.92 ± 0.91 2.74 ± 0.93 0.169
NT-proBNP, pg/mL 819.50 (1412) 109.00 (220)  < 0.001
Troponin I, ug/L 5.36 ± 10.81 1.86 ± 7.93  < 0.001
CRP, mg/L 5.23 (8.94) 1.69 (4.51)  < 0.001
Interrogated vessel    
Left anterior descending branch, n (%) 26 (54.2%) 146 (57.7%) 0.649
Circumflex branch, n (%) 7 (14.6%) 49 (19.4%) 0.435
Right coronary artery, n (%) 15 (31.3%) 58 (22.9%) 0.217
  1. Values are the mean ± standard deviation, median (interquartile range), or n (%)
  2. LVEF, left ventricular ejection fraction; PCI, percutaneous coronary intervention; NSTEMI, non-ST segment elevation myocardial infarction; STEMI, ST segment elevation myocardial infarction. LDL, low density lipoprotein; NT-Pro BNP, N-terminal pro brain natriuretic peptide; CRP, C-reactive protein