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Table 1 Patient characteristics

From: Long-term results after mitral valve surgery using minimally invasive versus sternotomy approach: a propensity matched comparison of a large single-center series

  Unmatched Matched
Total
N = 1357
MIS
N = 861
CS
N = 496
p value MIS
N = 422
CS
N = 422
p value
Mean ± SD or % Mean ± SD or % Mean ± SD or % Mean ± SD or % Mean ± SD or %
Age in years 63.9 ± 12.3 63.2 ± 12.2 65.2 ± 12.6 0.003 63.7 ± 12.6 64.5 ± 12.8 0.383
Female gender 43.3 41.6 46.4 0.086 45.3 45.3 1.000
BMI (kg/m2) 26.4 ± 4.7 26.2 ± 4.5 26.5 ± 4.9 0.315 25.8 ± 4.3 26.5 ± 4.8 0.026
CV risk factors
 Hypertension 53.7 56.4 49.0 0.008 48.8 50.2 0.680
 Dyslipidemia 16.8 22.6 6.9 < 0.001 8.8 7.6 0.530
Comorbidities general
 Diabetes mellitus 8.7 8.4 9.3 0.566 6.4 9.5 0.098
 Kidney failure (Crea. > 2.26 mg/dL) 1.7 0.6 3.6 < 0.001 0.9 1.7 0.363
 Stroke 5.5 5.5 5.4 0.991 5.9 4.5 0.353
 COPD 11.8 12.1 11.3 0.664 12.3 10.4 0.386
 PAD 3.0 2.7 3.6 0.321 2.1 2.4 0.817
Comorbidities cardiac
 Atrial fibrillation 32.4 32.5 32.3 0.919 35.3 31.5 0.243
 Coronary artery disease 10.2 9.6 11.3 0.334 6.9 8.5 0.366
 Prior MI (≤ 90 days) 0.7 0.8 0.4 0.500 1.2 0.5 0.451
 Prior Aortic Valve Replacement 2.1 1.5 3.0 0.059 2.1 1.7 0.614
 Prior CABG 3.9 3.0 5.4 0.026 2.4 3.6 0.310
 Prior Pacemaker 2.2 1.6 3.2 0.051 1.9 2.1 0.806
 NYHA class III/IV 75.5 69.0 86.9 < 0.001 85.1 84.6 0.848
 CCS class III/IV 4.1 2.2 7.3 < 0.001 4.0 3.8 0.859
 Pulmonary hypertension 12.0 14.8 7.3 < 0.001 9.0 8.1 0.622
Emergency indication for surgery 3.9 5.0 2.0 0.006 2.1 1.9 0.806
Log EuroSCORE I 7.8 ± 10.7 6.7 ± 10.2 9.7 ± 11.5 < 0.001 7.3 ± 11.4 7.9 ± 9.1 0.422
  1. p values that are statistically significant are highlighted in bold
  2. BMI body mass index, CABG coronary artery bypass graft, CCS Canadian Cardiovascular society, COPD chronic obstructive pulmonary disease, CV cardiovascular, MI myocardial infarction, NYHA New York Heart Association, PAD peripheral artery disease, SD standard deviation