Skip to main content

Table 1 Pre-match and post-match sample characteristics for primary outcome assessment

From: Resource use and clinical outcomes in patients with atrial fibrillation with ablation versus antiarrhythmic drug treatment

Variable Before Propensity Score Matching After Propensity Score Matching
AAD cohort (n = 920) Ablation cohort (n = 1508) Standardized difference AAD cohort (n = 558) Ablation cohort (n = 558) Standardized difference
Age 68 62 −0.5075 65 65 −0.0535
CCI score 0.7 0.72 0.0445 0.7 0.7 0.0027
CHA2DS2-VASc score 2.11 1.63 −0.322 1.9 1.9 0.0168
Cardiovascular-related outpatient visits (pre-index) 2.99 2.98 −0.3613 1.2 1.28 0.06
Cardiovascular-related inpatient visits (pre-index) 1.38 2.12 0.5151 1.75 1.83 0.0593
Female 45.65% 28.58% 0.359 34.41% 35.30% −0.0188
Year of index date
 2008 20.11% 13.26%   19.53% 15.05%  
 2009 19.24% 15.72%   19.89% 15.41%  
 2010 19.24% 19.76%   18.46% 18.10%  
 2011 17.72% 17.71%   17.20% 15.05%  
 2012 13.80% 18.04%   12.72% 19.18%  
 2013 9.89% 15.52% 0.2698 12.19% 17.20% 0.2653a
DCCV 19.78% 25.73% 0.1422 24.37% 23.84% −0.0126
Ischemic heart disease 17.07% 14.46% −0.0716 18.28% 19.53% 0.032
Heart failure 8.37% 9.81% 0.0503 9.68% 8.60% −0.0373
Cardiomyopathy 2.39% 4.97% 0.1374 3.58% 3.23% −0.0198
Valvular disease 6.63% 10.81% 0.1485 8.42% 7.89% −0.0196
Wolff Parkinson 0.11% 2.19% 0.1961 0.18% 1.08% 0.1137a
Other arrhythmia 10.33% 22.35% 0.3296 14.16% 15.95% 0.0501
Hypertension 36.09% 39.66% 0.0736 41.22% 42.29% 0.0218
Diabetes 9.57% 12.00% 0.0786 11.65% 11.47% −0.0056
Obstructive sleep apnea 0.54% 2.19% 0.1421 0.90% 1.25% 0.0348
COPD 5.54% 6.76% 0.0508 6.45% 6.63% 0.0072
Renal failure 1.20% 1.06% −0.0127 0.54% 0.72% 0.0227
Stroke/TIA 3.59% 1.92% −0.1018 2.69% 2.15% −0.035
Conduction system disease 14.67% 30.97% 0.3958 19.53% 20.97% 0.0357
Hyperthyroidism 0.98% 0.20% −0.102 0.18% 0.36% 0.0346
Rate control meds 89.57% 75.13% −0.3855 84.77% 85.84% 0.0304
Anticoagulants 60.98% 76.46% 0.3386 72.94% 68.64% −0.0947
  1. ais significant