Table 4.
Comparison between different parameters and the drop of DLCO into two populations: a drop of 15% and more, and a drop of <15%.
| Drop of DLCO < 15% | Drop of DLCO ≥ 15% | ||
|---|---|---|---|
| Median (IQR) | Median (IQR) | p Values | |
| Age | 61 (52–71) | 66 (53–75) | 0.127779 |
| Follow up (month) | 44 (22–60) | 49 (38–71) | 0.040146 |
| Contrast CT scan | 0 (0–1) | 1 (0–2) | 0.009261 |
| % justification a priori of emergency CT scan 1 | 100 (100–100) | 100 (100–100) | 0.704275 |
| % justification a priori of routine CT scan | 50 (30–71) | 50 (33–80) | 0.600688 |
| % justification a posteriori of routine CT scan | 50 (33–80) | 50 (33–80) | 0.978767 |
| irradiation over 1 year CTDI (mGy) | 28 (16–40) | 26 (17–39) | 0.676711 |
| irradiation over 1 year PDL (mGy*cm) | 793 (394–1111) | 700 (554–1174) | 0.742729 |
| irradiation over 3 years CTDI (mGy) | 42 (27–65) | 58 (39–75) | 0.039473 |
| irradiation over 3 years DLP (mGy*cm) | 1352 (973–2204) | 1585 (1254–2466) | 0.057749 |
| Total irradiation CDTI (mGy) | 56 (30–85) | 78 (47–103) | 0.004655 |
| Total irradiation DLP (mGy*cm) | 1840 (1050–2641) | 2431 (1613–3266) | 0.021919 |
| irradiation/year CDTI (mGy/year) | 17 (10–29) | 18 (12–24) | 0.815285 |
| Irradiation/year (mGy*cm/year) | 692 ± 536 | 831 ± 799 | 0.787854 |
| % low-dose CT scan | 0 (0–14) | 0 (0–6.7) | 0.236869 |
| % contrast CT Scan | 0 (0–20) | 17 (0–33) | 0.031569 |
| % emergency CT scan | 0 (0–11) | 0 (0–14) | 0.360847 |
CDTI: Computed Tomography Dose Index CDTI; DLP: Dose Length Product; IQR: interquartile range; data are analyzed with Mann–Whitney test. 1 n = 18 for DLCO ≥ 15%, n = 16 for DLCO ≤ 15%