Table 3.
Independent predictive factors in development and validation cohorts.
| Variables | Overall population(n=237) | Development cohort (n=190) | Validation cohort(n=47) | p |
|---|---|---|---|---|
| Smoking status, No. (%) | 0.6273 | |||
| Ex-smoker/smoker | 111 (46.84) | 87 (45.79) | 24 (51.06) | |
| Non-smoker | 126 (53.16) | 103 (54.21) | 23 (48.94) | |
| Prior COPD, No. (%) | 1 | |||
| Yes | 69 (29.11) | 55 (28.95) | 14 (29.79) | |
| No | 168 (70.89) | 135 (71.05) | 33 (70.21) | |
| GGO, No. (%) | 18 (7.59) | 15 (7.89) | 3 (6.38) | 0.9659 |
| Yes | ||||
| No | 219 (92.41) | 175 (92.11) | 44 (93.62) | |
| NSIP, No. (%) | 0.4776 | |||
| Yes | 30 (12.66) | 26 (13.68) | 4 (8.51) | |
| No | 207 (87.34) | 164 (86.32) | 43 (91.49) | |
| pleural effusions, No. (%) | 0.9958 | |||
| Yes | 68 (28.69) | 54 (28.42) | 14 (29.79) | |
| No | 169 (71.31) | 136 (71.58) | 33 (70.21) | |
| NLR (median [IQR]) | 8.09 [4.14, 15.42] | 8.73 [4.37, 15.65] | 6.213 [3.410, 11.488] | 0.0996 |
| PaO2 (median [IQR]) | 88.00 [76.30, 103.60] | 89.00 [76.95, 103.82] | 86.10 [69.95, 103.00] | 0.4123 |
COPD, chronic obstructive pulmonary disease; GGO, ground glass opacities; NSIP, non-specific interstitial pneumonitis; NLR, Neutrophil to Lymphocyte Ratio; PaO2, Oxygen Partial Pressure.