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. 2021 Feb 28;18(2):123–134. doi: 10.11909/j.issn.1671-5411.2021.02.003

1. Baseline characteristics before and after propensity score matching.

Variables Entire cohort (n = 710) Matched cohort (n = 334)
Non-thrombocytopenia
(n = 461, DPC ≤ 50%)
Thrombocytopenia
(n = 249, DPC > 50%)
P-
value
Non-thrombocytopenia
(n = 167, DPC ≤ 50%)
Thrombocytopenia
(n = 167, DPC > 50%)
P-
value
Data are presented as n (%). *Presented as median (interquartile range). APACHE: Acute Physiology and Chronic Health Evaluation; DPC: drop in platelet count.
Age, yrs 65 (58−75)* 67 (59.5−74)* 0.235 66 (60−76)* 68 (60−74)* 0.827
Male 338 (73.3%) 164 (65.9%) 0.037 110 (65.9%) 111 (66.5%) 1.000
Caucasian 369 (80.0%) 187 (75.1%) 0.127 126 (75.4%) 130 (77.8%) 0.671
Body mass index, kg/m2 29.06 (25.16−33.01)* 27.95 (24.93−32.22)* 0.113 28.7 (24.95−33.27)* 27.66 (24.93−32.38)* 0.318
APACHE IVa score 52 (38.25−76)* 65 (43−98)* < 0.001 60 (45−92)* 61 (42−93)* 0.544
Mean arterial pressure, mm Hg 76.33 (66.67−87.33)* 76.83 (65.58−90.33)* 0.724 76.33 (68−86.67)* 77.67 (65.67−90.33)* 0.679
Cardiovascular risk factors
 Hypertension 283 (61.4%) 161 (64.7%) 0.390 106 (63.5%) 106 (63.5%) 1.000
 Diabetes mellitus 177 (38.4%) 85 (34.1%) 0.262 51 (30.5%) 52 (31.1%) 1.000
 Hypercholesterolemia 52 (11.3%) 26 (10.4%) 0.733 20 (12.0%) 19 (11.4%) 1.000
 Renal insufficiency 52 (11.3%) 27 (10.8%) 0.860 11 (6.6%) 14 (8.4%) 0.678
Cardiac history
 Prior angina 41 (8.9%) 18 (7.2%) 0.443 12 (7.2%) 13 (7.8%) 1.000
 Prior myocardial infarction 100 (21.7%) 55 (22.1%) 0.903 41 (24.6%) 41 (24.6%) 1.000
 Prior percutaneous coronary intervention 75 (16.3%) 41 (16.5%) 0.946 22 (13.2%) 26 (15.6%) 0.626
 Prior coronary artery bypass grafting 34 (7.4%) 20 (8.0%) 0.753 8 (4.8%) 13 (7.8%) 0.359
 Prior congestive heart failure 79 (17.1%) 45 (18.1%) 0.754 23 (13.8%) 28 (16.8%) 0.551
 Prior valve disease 30 (6.5%) 25 (10.0%) 0.093 14 (8.4%) 18 (10.8%) 0.541
History of vascular diseases
 Prior stroke/Transient ischemic attack 31 (6.7%) 18 (7.2%) 0.800 7 (4.2%) 11 (6.6%) 0.481
 Prior peripheral vascular disease 20 (4.3%) 13 (5.2%) 0.594 6 (3.6%) 8 (4.8%) 0.791
 Prior hemorrhage 3 (0.7%) 2 (0.8%) 1.000 1 (0.6%) 1 (0.6%) 1.000
 Prior thrombosis 20 (4.3%) 11 (4.4%) 0.961 7 (4.2%) 7 (4.2%) 1.000
In-hospital cardiac diseases
 Angina 45 (9.8%) 26 (10.4%) 0.773 21 (12.6%) 20 (12.0%) 1.000
 Myocardial infarction 191 (41.4%) 89 (35.7%) 0.139 63 (37.7%) 66 (39.5%) 0.822
 Percutaneous transluminal coronary angioplasty 234 (50.8%) 142 (57.0%) 0.110 92 (55.1%) 92 (55.1%) 1.000
 Coronary artery bypass grafting 98 (21.3%) 41 (16.5%) 0.125 34 (20.4%) 31 (18.6%) 0.775
 Cardiogenic shock 15 (3.3%) 5 (2.0%) 0.338 5 (3.0%) 3 (1.8%) 0.727
Laboratory values
 Baseline platelet, × 109/L 192 (147.25−237)* 216 (165.5−257)* 0.005 201(158−249)* 215 (165−254)* 0.978
 Baseline hemoglobin, g/dL 12.40 (10.60−14.30)* 12.40 (10.70−14.30)* 0.767 12.3 (10.4−14.3)* 12.2 (10.2−14.5)* 0.862
 Baseline white blood cells, × 109/L 12.00 (9.36−16.90)* 13.00 (9.20−18.42)* 0.202 12 (9.6−16.5)* 13.2 (9.5−18.4)* 0.583
 Baseline glucose, mmol/L 8.06 (6.43−10.94)* 8.64 (6.50−12.92)* 0.037 8.39 (6.78−11.83)* 8.39 (6.5−11.28)* 0.739
 Baseline creatinine, mg/dL 1.07 (0.87−1.35)* 1.12 (0.90−1.52)* 0.07 1.04 (0.84−1.27)* 1.08 (0.87−1.49)* 0.107
Periprocedural medication
 Aspirin 377 (81.8%) 199 (79.9%) 0.546 141 (84.4%) 132 (79.0%) 0.233
 Aggregation inhibitors 168 (36.4%) 75 (30.1%) 0.090 58 (34.7%) 56 (33.5%) 0.913
 Glycoprotein IIB/IIIA inhibitor 91 (19.7%) 37 (14.9%) 0.106 23 (13.8%) 23 (13.8%) 1.000
 Unfractionated heparin 282 (61.2%) 151 (60.6%) 0.725 103 (61.7%) 106 (63.5%) 0.820
 Low molecular weight heparin 95 (20.6%) 63 (25.3%) 0.151 42 (25.1%) 38 (22.8%) 0.683
 Warfarin 45 (9.8%) 38 (15.3%) 0.030 20 (12.0%) 20 (12.0%) 1.000
 Fondaparinux 1 (0.2%) 6 (2.4%) 0.015 1 (0.6%) 1 (0.6%) 1.000
 Thrombin inhibitor 46 (10.0%) 31 (12.4%) 0.312 23 (13.8%) 15 (9.0%) 0.243
 Thrombolytic therapy 3 (0.7%) 6 (2.4%) 0.099 1 (0.6%) 1 (0.6%) 1.000