Table 4. Comparison results according to the classification by disease severity.
| Variables | Groups, mean ± SD |
P value# | |||
|---|---|---|---|---|---|
| Mild, n=36 | Moderate, n=22 | Severe, n=6 | Total, n=64 | ||
| Hospital days | 4.11±1.55 | 5.23±2.00 | 5.17±1.33 | 4.59±1.76 | 0.164 |
| Time to visit (hours) | 12.06±14.15 | 12.68±21.36 | 30.67±25.97 | 14.02±18.60 | 0.023 |
| Smoking history, n (%)§ | 6 (16.7) | 1 (4.5) | 0 (0.0) | 7 (10.9) | 0.099 |
| WBC count (/µL) | 9,561.1±3,169.1 | 10,984.5±3,629.7 | 11,440.0±4,344.6 | 10,226.6±3,473.2 | 0.22 |
| Segmented neutrophils (%) | 63.89±11.20 | 68.06±9.49 | 75.28±10.05 | 66.39±10.95 | 0.039 |
| ANC count (/µL) | 6,351.2±2,823.3 | 7,603.5±3,220.5 | 8,679.5±3,782.8 | 7,000.0±3,107.7 | 0.089 |
| ESR (mm/h)* | 5.95±4.74 | 7.29±6.74 | 2.67±1.15 | 6.18±5.43 | 0.402 |
| CRP (mg/L)* | 3.42±11.80 | 1.30±1.96 | 0.63±0.35 | 2.44±8.91 | 0.621 |
#, P values for differences were determined by trend test; §, smoking history includes smoker plus ex-smoker; *, ESR and CRP were checked in 39 (60.9%) cases (i.e., numbers of cases in mild, moderate and severe groups were 22, 14 and 3, respectively). SD, standard deviation; WBC, white blood cell; ANC, absolute neutrophil count; ESR, erythrocyte sedimentation rate; CRP, C-reactive protein.