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Table 1 Baseline patient characteristics stratified by type of ICD

From: Seven years of use of implantable cardioverter-defibrillator therapies: a nationwide population-based assessment of their effectiveness in real clinical settings

  Type of ICD
Characteristics Single-chamber ICD Dual-chamber ICD CRT-D
(n = 2,109) (n = 1,186) (n = 681)
Age (years), mean (SD) 56 (±14) 57 (±14) 60 (±12)
Age group, n (%)
  <10 years 6 (0.3) 3 (0.3) 2 (0.3)
  10 to 49 years 580 (27.5) 321 (27.1) 127 (18.7)
  50 to 59 years 580 (27.5) 310 (26.1) 189 (27.8)
  60 to 69 years 587 (27.8) 362 (30.5) 219 (32.2)
  70 years or more 356 (16.9) 190 (16.0) 143 (21.0)
Sex, n (%)        
  Female 626 (29.7) 365 (30.8) 176 (25.8)
  Male 1482 (70.3) 821 (69.2) 505 (74.2)
Arrhythmia, n (%)        
  Ventricular Flutter or Fibrillation 407 (19.3) 356 (30.0) 13 (1.9)
  Ventricular Tachycardia 914 (43.3) 618 (52.1) 242 (35.5)
  Supraventricular Tachycardia 514 (24.4) 101 (8.5) 2 (0.3)
Hospital location (state), n (%)        
  São Paulo 1069 (50.7) 703 (59.3) 486 (71.4)
  Other 1040 (49.3) 483 (40.7) 195 (28.6)
Category of hospital, n (%)        
  Charity Hospital 814 (38.6) 587 (49.5) 377 (55.4)
  Private Hospital (non-philanthropic) 245 (11.6) 175 (14.8) 38 (5.6)
  Public Hospital 1050 (49.8) 424 (35.8) 266 (39.1)
Implant technique – mini-thoracotomy, n (%) 0   0   227 (38.0)