Table 1

Baseline Characteristics for Patients With/Without Complications (Periprocedural and/or 30-Day Readmission) After AF Ablation

VariableAll Patients (N = 4,156)No Complications (n = 3,591)Complications (n = 565)p Value
Mean age, yrs61.7 ± 12.061.2 ± 12.064.7 ± 11.8<0.001
Age group, yrs<0.001
 18–44310 ± 7.5286 ± 8.024 ± 4.3
 45–54778 ± 18.7693 ± 19.385 ± 15.0
 55–641,327 ± 31.91,157 ± 32.2170 ± 30.1
 65–841,080 ± 26.0912 ± 25.4168 ± 29.7
 75–84512 ± 12.3415 ± 11.697 ± 17.2
 ≥8597 ± 23877 ± 2.120 ± 3.5
Age ≥65 yrs1,689 ± 40.61,404 ± 39.1285 ± 50.4<0.001
Sex<0.001
 Male2,819 (67.8)2,484 (69.2)335 (59.3)
 Female1,219 (29.3)997 (27.8)222 (39.3)
Primary payer<0.001
 Medicare1,513 (36.4)1,251 (34.8)262 (46.5)
 Private insurance2,416 (58.3)2,146 (59.8)270 (47.8)
Race/ethnicity0.360
 White3,353 (80.7)2,896 (80.7)457 (80.9)
 Black67 (1.6)57 (1.6)10 (1.8)
 Hispanic243 (5.9)203 (5.7)40 (7.1)
 Other/missing493 (11.9)189 (5.3)33 (5.8)
Year0.348
 2005684 (16.5)577 (16.1)107 (18.9)
 2006944 (22.7)815 (22.7)129 (22.8)
 20071,206 (29.0)1,046 (29.1)160 (28.3)
 20081,322 (31.8)1,153 (32.1)169 (29.9)
AF hospitalizations during year prior to ablation<0.001
 03,289 (79.1)2,873 (80.0)416 (73.6)
 1671 (16.2)563 (15.7)108 (19.1)
 2146 (3.5)120 (3.3)26 (4.6)
 ≥350 (1.2)35 (1.0)15 (2.7)
Coronary artery disease609 (14.7)512 (14.3)97 (17.2)0.069
Heart failure388 (9.3)306 (8.5)82 (14.5)<0.001
Renal disease139 (3.3)106 (3.0)33 (5.8)<0.001
Cerebrovascular disease57 (1.4)45 (1.3)12 (2.1)0.098
Diabetes mellitus518 (12.5)437 (12.2)81 (14.3)0.147
Valvular disease510 (12.3)429 (12.0)81 (14.3)0.108
Hypertension2,090 (50.3)1,776 (49.5)314 (55.6)0.007
Lung disease172 (4.1)137 (3.8)35 (6.2)0.008
Mean no. of procedural experiences (SD)§54.32 ± 53.255.8 ± 53.844.6 ± 48.0<0.001
Quartile 1 (highest)1,037 ± 25.0933 ± 26.0104 ± 18.4
Quartile 21,015 ± 24.4885 ± 24.6130 ± 23.0
Quartile 31,013 ± 24.4858 ± 23.9155 ± 27.4
Quartile 4 (lowest)1,091 ± 26.2915 ± 25.5176 ± 31.2

Values are mean ± SD or n (%).

  • Significant predictors of 30-day readmission only.

  • Significant predictors of inpatient outcomes only.

  • Defined as the number of hospitalizations with atrial fibrillation (AF) in the primary diagnostic position; for full cohort, n = 31 for 3, n = 11 for 4, n = 5 for 5, and n = 3 for 6 AF hospitalizations.

  • § Procedural experience is the number of AF ablations completed at a given hospital during the 12 months preceding each index case.