Table 3 Univariate and Multivariate linear regression analysis
From: Cumulative radiation dose incurred during the management of complex pleural space infection
Variable | Total CED mean difference | Lower 95% CI | Upper 95% CI | p value |
|---|---|---|---|---|
Univariate linear regression analysis | ||||
Hospital has thoracic surgery presence (Baseline: No) | − 1.233 | − 4.065 | 1.598 | 0.393 |
Surgical Treatment (Baseline: Medical) | − 8.446 | − 10.504 | − 6.388 | < 0.001 |
Crossover Treatment (Baseline: Medical) | 2.374 | − 0.770 | 5.518 | 0.139 |
Body Mass Index | 0.027 | − 0.114 | 0.169 | 0.705 |
Body Mass Index 20–< 30 (Baseline: < 20) | 1.781 | − 1.999 | 5.561 | 0.355 |
Body Mass Index 30–< 40 (Baseline: < 20) | 1.462 | − 2.743 | 5.666 | 0.495 |
Body Mass Index > 40 (Baseline: < 20) | 0.713 | − 4.605 | 6.031 | 0.792 |
Hospital Length of Stay, Log-2 transformed, days | 5.386 | 4.287 | 6.485 | < 0.001 |
Hospital Length of Stay > 7 days (Baseline: 7 days or less) | 7.404 | 5.060 | 9.749 | < 0.001 |
Total number of CT scans | 7.898 | 7.595 | 8.201 | < 0.001 |
More than 1 CT scan (Baseline: 0 or 1 CT scan) | 16.613 | 14.918 | 18.308 | < 0.001 |
RAPID Score | 0.119 | − 0.546 | 0.785 | 0.725 |
RAPID Score = 3–4 (Baseline: 0–2) | − 1.312 | − 3.507 | 0.882 | 0.241 |
RAPID Score = 5–7 (Baseline: 0–2) | 1.072 | − 1.993 | 4.138 | 0.492 |
Age at Admission, years | − 0.061 | − 0.120 | − 0.003 | 0.041 |
Chest tube duration, days | 0.032 | 0.001 | 0.064 | 0.045 |
Hospital (Baseline: Community) | 3.059 | − 0.054 | 6.173 | 0.054 |
Evidence of loculation on first chest CT, yes (Ref = No) | − 2.552 | − 4.928 | − 0.175 | 0.035 |
Abscess or necrotizing pneumonia, yes (Ref = No) | 2.935 | 0.173 | 5.696 | 0.037 |
CT guided tube thoracostomy, yes (Ref = No) | 7.431 | 5.087 | 9.775 | < 0.001 |
Fluoroscopic guided tube thoracostomy, yes (Ref = No) | 8.691 | 5.287 | 12.095 | < 0.001 |
Multivariate linear regression analysis: model 1 | ||||
Surgical Treatment (Baseline: Medical) | − 5.314 | − 7.289 | − 3.338 | < 0.001 |
Crossover Treatment (Baseline: Medical) | 2.159 | − 0.714 | 5.032 | 0.140 |
Hospital Length of Stay, Log-2 transformed, days | 3.742 | 2.696 | 4.788 | < 0.001 |
Age at Admission, years | − 0.055 | − 0.105 | − 0.005 | 0.032 |
Evidence of loculation on first chest CT, yes (Ref = No) | − 1.490 | − 3.527 | 0.548 | 0.152 |
Abscess or necrotizing pneumonia, yes (Ref = No) | − 0.326 | − 2.751 | 2.099 | 0.792 |
CT guided tube thoracostomy, yes (Ref = No) | 5.371 | 3.260 | 7.482 | < 0.001 |
Fluoroscopic guided tube thoracostomy, yes (Ref = No) | 6.388 | 3.334 | 9.442 | < 0.001 |
Multivariate linear regression analysis: model 2 | ||||
Surgical Treatment (Baseline: Medical) | − 7.155 | − 9.086 | − 5.224 | < 0.001 |
Crossover Treatment (Baseline: Medical) | 0.974 | − 1.952 | 3.900 | 0.513 |
Hospital Length of Stay, Log-2 transformed, days | 4.162 | 3.094 | 5.230 | < 0.001 |
Age at Admission, years | − 0.051 | − 0.102 | 0.000 | 0.052 |
Evidence of loculation on first chest CT, yes (Ref = No) | − 1.516 | − 3.615 | 0.583 | 0.156 |
Abscess or necrotizing pneumonia, yes (Ref = No) | 0.219 | − 2.273 | 2.711 | 0.863 |