Table 3.
The Baseline Data for the High BCR Group and Low BCR Group After Propensity Score Matching (PSM)
| Variable | BCR<22.78 (n=1174) | BCR≥22.78(n=1174) | P-Value |
|---|---|---|---|
| Demographic | |||
| Age | 69.00 (60.00, 76.00) | 68.00 (61.00, 76.00) | 0.815 |
| Male | 526 (44.80) | 539 (45.91) | 0.590 |
| BMI | 28.15 (23.09, 33.93) | 27.54 (21.95, 33.95) | 0.077 |
| Ethnicity | |||
| White | 1002 (85.35) | 1000 (85.18) | 0.808 |
| Black | 87 (7.41) | 82 (6.98) | |
| Others | 85 (7.24) | 92 (7.84) | |
| Vital signs | |||
| HR (beats/min) | 89.99 (79.23, 99.23) | 89.99 (81.34, 99.20) | 0.078 |
| RR (beats/min) | 21.02 (18.34, 23.47) | 21.00 (18.50, 22.98) | 0.386 |
| SBP (mmHg) | 122.26 (111.30, 131.74) | 121.14 (110.27, 130.37) | 0.047 |
| DBP (mmHg) | 66.90 (60.00, 72.58) | 66.90 (59.81, 72.28) | 0.543 |
| SpO2 (%) | 96.03 (94.34, 97.53) | 96.00 (94.38, 97.43) | 0.762 |
| Comorbidities | |||
| Hypertension | 197 (16.78) | 191 (16.27) | 0.739 |
| Diabetes | 178 (15.16) | 171 (14.57) | 0.685 |
| Congestive heart failure | 242 (20.61) | 229 (19.51) | 0.503 |
| Myocardial infarction | 47 (4.00) | 38 (3.24) | 0.320 |
| Asthma | 46 (3.92) | 47 (4.00) | 0.916 |
| Liver disease | 11 (0.94) | 14 (1.19) | 0.546 |
| Gastrointestinal hemorrhage | 23 (1.96) | 24 (2.04) | 0.883 |
| Chronic kidney disease | 73 (6.22) | 64 (5.45) | 0.428 |
| End stage renal disease | 2 (0.17) | 1 (0.09) | 1.000 |
| Acute renal failure | 157 (13.37) | 148 (12.61) | 0.581 |
| Malignant tumor | 28 (2.39) | 32 (2.73) | 0.601 |
| Sepsis | 176 (14.99) | 176 (14.99) | 1.000 |
| Laboratory | |||
| Hemoglobin(g/dL) | 11.89 (10.40, 13.30) | 11.89 (10.50, 13.15) | 0.383 |
| WBC(K/uL) | 10.50 (7.70, 13.70) | 11.20 (8.11, 14.57) | 0.003 |
| PLT(K/uL) | 211.50 (166.00, 263.00) | 215.00 (165.62, 269.00) | 0.540 |
| RDW(%) | 15.10 (13.91, 16.20) | 15.20 (14.05, 16.20) | 0.201 |
| Glucose(mg/dL) | 168.84 (145.50, 168.84) | 168.84 (144.00, 170.00) | 0.543 |
| Sodium(mmol/L) | 138.50 (136.00, 141.00) | 138.50 (135.50, 141.00) | 0.173 |
| Potassium(mmol/L) | 4.30 (3.90, 4.70) | 4.30 (3.90, 4.70) | 0.799 |
| Calcium(mg/dL) | 8.71 (8.30, 9.15) | 8.71 (8.30, 9.10) | 0.219 |
| PH | 7.30 (7.30, 7.40) | 7.30 (7.30, 7.40) | 0.567 |
| PaO2(mmHg) | 105.35 (75.50, 114.19) | 103.23 (76.00, 108.96) | 0.543 |
| PaCO2(mmHg) | 60.25 (49.42, 68.16) | 60.25 (49.95, 69.00) | 0.915 |
| Anion gap(mEq/L) | 10.00 (6.75, 12.50) | 9.50 (7.00, 12.50) | 0.898 |
| Bicarbonate(mmol/L) | 29.78 (25.50, 34.00) | 29.78 (26.00, 33.50) | 0.954 |
| BUN(mg/dL) | 17.29 (12.50, 26.50) | 27.00 (19.50, 39.00) | <0.001 |
| Cr(mg/dL) | 1.00 (0.75, 1.49) | 0.90 (0.65, 1.30) | <0.001 |
| Treatment | |||
| Corticosteroid | 128 (10.90) | 133 (11.33) | 0.743 |
| Bronchodilators | 155 (13.20) | 167 (14.22) | 0.472 |
| Invasive-ventilation | 82 (6.98) | 66 (5.62) | 0.174 |
| Dialysis | 14 (1.19) | 12 (1.02) | 0.693 |
| APACHE-IV | 58.00 (47.00, 65.00) | 58.00 (49.00, 64.00) | 0.397 |
| ICU stay (day) | 2.70 (1.69, 4.66) | 2.85 (1.77, 4.82) | 0.149 |
| In-hospital mortality | 87 (7.41) | 128 (10.90) | 0.003 |
Notes: A p-value less than 0.05 is considered statistically significant.
Abbreviations: BMI, Body Mass Index; HR, Heart Rate; RR, Respiratory Rate; SBP, Systolic Blood Pressure; DBP, Diastolic Blood Pressure; RDW, Red Blood Cell Distribution Width; WBC, White Blood Cell; PLT, Platelet; Cr, Creatinine; BUN, Blood urea nitrogen; BCR, BUN to Creatinine ratio.