Table 1

Baseline Patient Characteristics at the Time of Pacemaker Implantation

Single-Chamber (n = 9,376)Dual-Chamber (n = 63,325)Both (n = 72,701)
Male56.854.654.9
Age, yrs80.4 ± 9.574.4 ± 12.375.1 ± 12.1
1-yr comorbidity history
 Atrial fibrillation84.837.243.3
 Atrioventricular block8.617.716.5
 Chronic pulmonary disease41.431.733.0
 Coronary artery bypass graft2.73.23.2
 Coronary artery disease57.551.252.0
 Dementia8.75.05.5
 Diabetes37.634.835.1
 Endocarditis2.41.71.8
 Heart failure49.628.231.0
 Hyperlipidemia51.155.454.9
 Hypertension86.181.582.1
 Myocarditis0.10.10.1
 Percutaneous coronary intervention6.97.97.8
 Renal disease20.716.216.7
 Sick sinus syndrome29.028.528.6
 Stroke20.115.616.2
 Tricuspid valve disease7.45.25.5
 Vascular disease27.120.821.6
 Venous embolism/thrombosis4.73.43.5

Values are % or mean ± SD.