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Table 1 Baseline demographic clinical characteristics of patients in the RA + CB and RA (control) groups

From: Intensive plaque modification with rotational atherectomy and cutting balloon before drug-eluting stent implantation for patients with severely calcified coronary lesions: a pilot clinical study

   RA + CB RA P
Subjects, n   35 36  
Demographics Age, y 69.3 ± 11.6 72.2 ± 10.2 0.269
  Male, n (%) 25 (71.4) 25 (69.4) 0.855
  Body mass index, kg/m2 26.2 ± 4.9 24.8 ± 4.1 0.184
Diagnosis, n (%) Stable angina 7 (20.0) 6 (16.7) 0.717
  Unstable angina 26 (74.3) 28 (77.8) 0.730
  Acute myocardial infarction 2 (5.7) 2 (5.6) 0.977
Risk factors, n (%) Diabetes mellitus 25 (71.4) 27 (75.0) 0.734
  Hypertension 27 (77.1) 28 (77.8) 0.949
  Current smokers 20 (57.1) 22 (61.1) 0.734
  Dyslipidemia 18 (51.4) 20 (55.6) 0.727
  Chronic kidney disease 10 (28.6) * 3 (8.3) 0.027
  LVEF < 50 % 14 (40.0) 16 (44.4) 0.705
Past history, n (%) Myocardial infarction 8 (22.9) 10 (27.8) 0.738
  PCI 5 (14.3) 6 (16.7) 0.782
  Coronary artery bypass graft 0 (0) 0 (0)
  1. *P < 0.05 compared with RA group