Table 2.
The Baseline Data for the High BCR Group and Low BCR Group Before Propensity Score Matching(PSM)
| Variable | BCR<22.78 (n=1840) | BCR≥22.78 (n=1559) | P-Value |
|---|---|---|---|
| Demographic | |||
| Age | 66.00 (58.00, 74.00) | 70.00 (62.00, 77.00) | <0.001 |
| Male | 914 (49.67) | 644 (41.31) | <0.001 |
| BMI | 28.51 (23.27, 35.32) | 26.81 (21.30, 32.95) | <0.001 |
| Ethnicity | |||
| White | 1460 (79.35) | 1359 (87.17) | <0.001 |
| Black | 221 (12.01) | 85 (5.45) | |
| Others | 159 (8.64) | 115 (7.38) | |
| Vital signs | |||
| HR (beats/min) | 90.00 (80.00, 99.00) | 90.00 (81.00, 99.00) | 0.048 |
| RR (beats/min) | 21.00 (18.00, 23.00) | 21.00 (18.00, 23.00) | 0.932 |
| SBP (mmHg) | 122.26 (111.25, 132.78) | 121.17 (109.94, 130.51) | 0.002 |
| DBP (mmHg) | 66.90 (60.00, 72.84) | 66.64 (59.32, 71.65) | <0.01 |
| SpO2 (%) | 96.00 (94.36, 97.57) | 96.00 (94.41, 97.52) | 0.833 |
| Comorbidities | |||
| Hypertension | 324 (17.61) | 247 (15.84) | 0.170 |
| Diabetes | 282 (15.33) | 237 (15.20) | 0.920 |
| Congestive heart failure | 361 (19.62) | 311 (19.95) | 0.810 |
| Myocardial infarction | 65 (3.53) | 53 (3.40) | 0.833 |
| Asthma | 107 (5.82) | 50 (3.21) | <0.001 |
| Liver disease | 23 (1.25) | 17 (1.09) | 0.667 |
| Gastrointestinal hemorrhage | 32 (1.74) | 38 (2.44) | 0.153 |
| Chronic kidney disease | 110 (5.98) | 88 (5.64) | 0.679 |
| End stage renal disease | 45 (2.45) | 1 (0.06) | <0.001 |
| Acute renal failure | 249 (13.53) | 190 (12.19) | 0.244 |
| Malignant tumor | 42 (2.28) | 35 (2.25) | 0.942 |
| Sepsis | 297 (16.14) | 235 (15.07) | 0.393 |
| Laboratory | |||
| Hemoglobin(g/dL) | 12.00 (10.50, 13.50) | 11.80 (10.40, 13.00) | <0.001 |
| WBC(K/uL) | 10.63 (7.90, 13.87) | 11.10 (8.00, 14.40) | 0.038 |
| PLT(K/uL) | 214.17 (168.00, 267.00) | 212.00 (165.00, 263.50) | 0.147 |
| RDW(%) | 15.10 (13.95, 16.25) | 15.25 (14.10, 16.25) | 0.165 |
| Glucose(mg/dL) | 168.84 (145.19, 168.84) | 168.84 (143.00, 171.71) | 0.432 |
| Sodium(mmol/L) | 138.00 (135.50, 141.00) | 139.00 (136.00, 141.00) | <0.001 |
| Potassium(mmol/L) | 4.25 (3.90, 4.60) | 4.30 (3.95, 4.70) | <0.001 |
| Calcium(mg/dL) | 8.71 (8.30, 9.10) | 8.75 (8.35, 9.13) | 0.121 |
| PH | 7.30 (7.30, 7.40) | 7.30 (7.30, 7.40) | 0.114 |
| PaO2(mmHg) | 107.37 (75.69, 116.66) | 101.00 (75.73, 109.00) | 0.074 |
| PaCO2(mmHg) | 60.25 (46.14, 65.00) | 60.25 (52.00, 72.00) | <0.001 |
| Anion gap(mEq/L) | 10.15 (7.32, 13.06) | 9.00 (6.32, 12.00) | <0.001 |
| Bicarbonate(mmol/L) | 28.12 (24.50, 32.37) | 30.00 (26.84, 35.00) | <0.001 |
| BUN(mg/dL) | 17.00 (12.20, 26.50) | 27.00 (19.84, 40.00) | <0.001 |
| Cr(mg/dL) | 1.03 (0.76, 1.50) | 0.88 (0.64, 1.29) | <0.001 |
| Treatment | |||
| Corticosteroid | 206 (11.20) | 179 (11.48) | 0.793 |
| Bronchodilators | 275 (14.95) | 224 (14.37) | 0.635 |
| Invasive-ventilation | 139 (7.55) | 96 (6.16) | 0.110 |
| Dialysis | 68 (3.70) | 13 (0.83) | <0.001 |
| APACHE-IV | 58.00 (45.00, 62.00) | 58.00 (51.00, 67.00) | <0.001 |
| ICU stay (day) | 2.57 (1.63, 4.36) | 2.93 (1.81, 5.02) | <0.001 |
| In-hospital mortality | 116(6.30) | 181(11.61) | <0.001 |
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.