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Table 3 Pre-match and post-match sample characteristics for secondary 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 = 927) Ablation cohort (n = 1528) Standardized difference AAD cohort (n = 615) Ablation cohort (n = 615) Standardized difference
Age 68 62 −0.5428 65 66 0.0613
CCI score 0.7 0.71 0.0255 0.74 0.75 0.0205
CHA2DS2-VASc score 2.11 1.63 −0.3626 1.24 1.23 0.0517
Cardiovascular-related outpatient visits (pre-index) 1.46 0.96 −0.3568 1.23 1.17 −0.0449
Cardiovascular-related inpatient visits (pre-index) 1.38 2.13 0.4898 1.76 1.80 0.0349
Female 45.63% 28.86% 0.3747 34.15% 36.26% −0.0443
Year of index date
 2008 20.28% 13.29%   18.05% 13.98%  
 2009 18.99% 15.58%   19.02% 16.26%  
 2010 19.20% 19.90%   19.35% 19.19%  
 2011 17.80% 17.67%   16.59% 15.45%  
 2012 13.81% 18.06%   14.47% 18.05%  
 2013 9.92% 15.51% 0.2612 12.52% 17.07% 0.1942a
DCCV 19.31% 25.59% 0.1473 25.37% 26.18% 0.0186
Ischemic heart disease 17.04% 14.53% −0.0852 16.42% 17.56% 0.0303
Heart failure 8.41% 9.75% 0.0363 9.59% 9.92% 0.011
Cardiomyopathy 2.37% 4.91% 0.1332 3.25% 2.93% −0.0188
Valvular disease 6.69% 10.73% 0.138 8.94% 9.11% 0.0057
Wolff Parkinson 0.11% 2.23% 0.1951 0.16% 0.65% 0.0767
Other arryhthmias 10.46% 22.58% 0.3094 14.80% 16.26% 0.0404
Hypertension 36.14% 39.66% 0.0308 41.30% 39.67% −0.0331
Diabetes 9.39% 11.98% 0.0611 11.54% 11.71% 0.0051
Obstructive sleep apnea 0.54% 2.23% 0.1268 1.14% 1.46% 0.0287
COPD 5.50% 6.68% 0.0572 6.99% 6.34% −0.0261
Renal failure 1.19% 1.05% −0.0397 0.81% 0.65% −0.0191
Stroke/TIA 3.56% 1.90% −0.103 2.93% 1.95% −0.0633
Conduction system disease 14.89% 31.02% 0.3682 21.14% 22.28% 0.0276
Hyperthyroidism 1.08% 0.20% −0.0968 0.16% 0.16% 0
Rate control meds 89.64% 75.13% −0.3948 84.88% 84.72% −0.0045
Anticoagulants 60.95% 76.46% 0.3266 72.68% 70.57% −0.0469
  1. ais significant