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Table 3 Preoperative comorbidities prior to and following propensity score matching

From: Pre-operative beta-blocker therapy does not affect short-term mortality after esophageal resection for cancer

Preoperative Co-morbidity Before matching After matching
BB(−) BB(+) p BB(−) BB(+) p
(n = 953) (n = 513)   (n = 513) (n = 513)
Arrythmia 169 (17.7%) 186 (36.3%) < 0.001 119 (23.2%) 186 (36.3%) < 0.001
Myocardial Infarction 20 (2.1%) 97 (18.9%) < 0.001 15 (2.9%) 97 (18.9%) < 0.001
Congestive heart failure 38 (4.0%) 80 (15.6%) < 0.001 30 (5.8%) 80 (15.6%) < 0.001
Hypertension 266 (27.9%) 403 (78.6%) < 0.001 178 (34.7%) 403 (78.6%) < 0.001
Peripheral vascular disease 23 (2.4%) 23 (4.5%) 0.044 19 (3.7%) 23 (4.5%) 0.635
Cerebrovascular disease 39 (4.1%) 40 (7.8%) 0.004 31 (6.0%) 40 (7.8%) 0.313
Peptic ulcer 48 (5%) 44 (8.6%) 0.011 33 (6.4%) 44 (8.6%) 0.242
Diabetes Mellitus 68 (7.1%) 59 (11.5%) 0.006 48 (9.4%) 59 (11.5%) 0.300
COPD 83 (8.7%) 59 (11.5%) 0.10 64 (12.5%) 59 (11.5%) 0.693
Liver diesease 18 (1.9%) 15 (2.9%) 0.28 13 (2.5%) 15 (2.9%) 0.850
Solid tumor 938 (98.4%) 489 (95.3%) < 0.001 506 (98.6%) 489 (95.3%) 0.004
Leukemia 5 (0.5%) 1 (0.2%) 0.67 4 (0.8%) 1 (0.2%) 0.371
Lymphoma 6 (0.6%) 3 (0.6%) 1.00 5 (1.0%) 3 (0.6%) 0.724
Dementia 4 (0.4%) 2 (0.4%) 1.00 3 (0.6%) 2 (0.4%) 1.00
  1. COPD chronic obstructive pulmonary disease