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. 2014 May 9;9(5):e96385. doi: 10.1371/journal.pone.0096385

Table 4. Distribution of abbreviated model covariates by transfusion status in the training dataset.

Characteristic No Transfusion Transfusion p-value Abs. Std. diff
Age 64.72±12.02 71.20±12.46 p<0.001 52.9
Height 171.11±10.53 165.94±11.26 p<0.001 47.4
Weight 89.44±20.94 81.34±22.59 p<0.001 37.2
Chronic Lung Disease 5,496/30,023 (18.3%) 267/920 (29.0%) p<0.001 25.4
Diabetes Mellitus 11,032/30,034 (36.7%) 450/922 (48.8%) p<0.001 24.6
Diabetes Therapy: None 465/11,007 (4.2%) 19/447 (4.3%) p = 0.979 0.1
Diabetes Therapy: Diet 661/11,007 (6.0%) 24/447 (5.4%) p = 0.578 2.7
Diabetes Therapy: Oral 5,337/11,007 (48.5%) 157/447 (35.1%) p<0.001 27.3
Diabetes Therapy: Insulin 4,508/11,007 (41.0%) 246/447 (55.0%) p<0.001 28.5
Diabetes Therapy: Other 36/11,007 (0.3%) 1/447 (0.2%) p = 0.706 2.0
Cardiogenic Shock w/in 24 hours or at start of PCI 607/30,005 (2.0%) 149/921 (16.2%) p<0.001 50.8
CAD Presentation: No symptom, no angina 2,216/30,038 (7.4%) 58/922 (6.3%) p = 0.213 4.3
CAD Presentation: Symptom unlikely to be ischemic 736/30,038 (2.5%) 14/922 (1.5%) p = 0.070 6.7
CAD Presentation: Stable angina 5,339/30,038 (17.8%) 64/922 (6.9%) p<0.001 33.4
CAD Presentation: Unstable angina 11,661/30,038 (38.8%) 238/922 (25.8%) p<0.001 28.1
CAD Presentation: Non-STEMI 5,719/30,038 (19.0%) 276/922 (29.9%) p<0.001 25.5
CAD Presentation: ST-Elevation MI (STEMI) or equivalent 4,367/30,038 (14.5%) 272/922 (29.5%) p<0.001 36.7
Anginal Classification w/in 2 Weeks: No symptoms 3,370/29,993 (11.2%) 137/919 (14.9%) p<0.001 10.9
Anginal Classification w/in 2 Weeks: CCS I 1,043/29,993 (3.5%) 15/919 (1.6%) p = 0.002 11.7
Anginal Classification w/in 2 Weeks: CCS II 4,711/29,993 (15.7%) 71/919 (7.7%) p<0.001 25.0
Anginal Classification w/in 2 Weeks: CCS III 10,451/29,993 (34.8%) 229/919 (24.9%) p<0.001 21.8
Anginal Classification w/in 2 Weeks: CCS IV 10,418/29,993 (34.7%) 467/919 (50.8%) p<0.001 32.9
Heart Failure w/in 2 Weeks 2,840/30,031 (9.5%) 316/921 (34.3%) p<0.001 63.0
CK-MB Pre-Procedure 25.99±60.80 30.58±50.70 p = 0.201 8.2
Troponin I Pre-Procedure 3.97±15.56 7.58±18.90 p<0.001 20.8
Troponin T Pre-Procedure 0.66±3.18 1.95±4.73 p = 0.006 32.0
Pre-Procedure Creatinine 1.14±0.93 1.75±1.70 p<0.001 44.0
Pre-Procedure Hemoglobin 13.51±1.84 10.85±2.10 p<0.001 134.8