Table 1.
Baseline demographic characteristics, clinical features, and laboratory results of the patients.
| Variables | Total (n = 133) | OI group (n = 40) | Non-OI group (n = 93) | P |
|---|---|---|---|---|
| Age (years) | 58.8 ± 12.0 | 57.1 ± 12.3 | 59.60 ± 11.9 | 0.283 |
| Gender (male/female) | 117/16 | 36/4 | 81/12 | 0.776 |
| BMI | 25.19 ± 2.97 | 25.68 ± 3.81 | 24.98 ± 2.53 | 0.293 |
| Elapsed time after onset (hours) | 10.17 ± 7.11 | 10.1 ± 6.0 | 10.2 ± 7.6 | 0.917 |
| Current smoker | 63.91 % (85) | 65.00 % (26) | 63.44 % (59) | 0.864 |
| Alcohol drinking | 44.36 % (59) | 50.00 % (20) | 41.94 % (39) | 0.634 |
| Ta (℃) | 36.56 ± 0.29 | 36.61 ± 0.29 | 36.54 ± 0.28 | 0.163 |
| Tp (℃) | 37.75 ± 0.56 | 37.94 ± 0.62 | 37.67 ± 0.51 | 0.010 |
| The timing of Tp (days) | 3.1 ± 1.5 | 3.4 ± 1.3 | 3.0 ± 1.6 | 0.163 |
| Heart rate (beats per minute) | 83.5 ± 16.1 | 87.0 ± 17.9 | 82.0 ± 15.1 | 0.101 |
| Respiratory rate (breaths per minute) | 20.0 ± 2.1 | 20.3 ± 2.2 | 19.9 ± 3.4 | 0.477 |
| Systolic blood pressure (mmHg) | 162.3 ± 28.6 | 168.8 ± 31.1 | 159.4 ± 29.2 | 0.082 |
| Diastolic blood pressure (mmHg) | 93.6 ± 17.6 | 97.2 ± 17.3 | 92.1 ± 17.6 | 0.121 |
| Platelet count (×109/L) | 170.1 ± 71.9 | 177.3 ± 66.6 | 167.0 ± 74.1 | 0.450 |
| White blood cell count (×109/L) | 12.14 ± 3.72 | 12.36 ± 4.00 | 12.04 ± 3.61 | 0.651 |
| Neutrophil percentage (%) | 85.28 ± 7.86 | 86.04 ± 7.58 | 84.95 ± 8.00 | 0.469 |
| CRP (mg/L) | 23.19 ± 25.40 | 41.74 ± 27.71 | 15.21 ± 19.66 | 0.000 |
| Procalcitonin (ug/L) | 0.50 ± 2.27 | 1.14 ± 4.06 | 0.22 ± 0.42 | 0.157 |
| D-dimer (mg/L) | 7.74 ± 11.63 | 7.99 ± 11.75 | 7.64 ± 11.64 | 0.875 |
| Albumin (g/L) | 36.60 ± 5.47 | 34.00 ± 5.14 | 37.72 ± 5.24 | 0.000 |
| CRP/albumin | 0.67 ± 0.77 | 1.27 ± 0.89 | 0.41 ± 0.53 | 0.000 |
| Serum creatinine (umol/L) | 89.05 ± 42.50 | 99.22 ± 53.08 | 84.67 ± 35.51 | 0.120 |
| CK-MB (ug/L) | 2.46 ± 6.22 | 2.97 ± 6.75 | 2.24 ± 6.00 | 0.537 |
| Troponin (ug/L) | 0.026 ± 0.10 | 0.020 ± 0.020 | 0.030 ± 0.12 | 0.687 |
| BNP (ng/L) | 213.58 ± 248.75 | 292.14 ± 251.11 | 179.80 ± 241.27 | 0.016 |
| Serum glucose (mmol/L) | 6.91 ± 2.12 | 6.90 ± 2.28 | 6.92 ± 2.06 | 0.959 |
Abbreviations: OI, oxygenation impairment; BMI, body mass index; Ta, body temperature on admission; Tp, the peak body temperature; CRP, C-reactive protein; CK-MB, creatine kinase-muscle/brain; BNP, B-type natriuretic peptide.