Table 3.
Clinical measurements for SPN patients from index date by subsequent clinic visit
| Visit Characteristics | Patients with SPN and no diagnosis of Lung Cancer | Visit one following index visit | Visit two following index visit | Visit three following index visit | Visit 4 + all visits up to end of study period |
|---|---|---|---|---|---|
| N = 15,978 | N = 14,366 | N = 13,009 | N = 11,715 | N = 10,476 | |
| Days (median (IQR)) between visits | 11 (3, 42) | 16 (4, 50) | 17 (5, 49) | 32.5 (19.3, 56.1) | |
| Cumulative days from index visit (median (IQR)) | 11 (3, 42) | 38 (12, 104) | 67 (25, 151) | 196.4 (148.6, 251.5) | |
| LDCT scan | 26 (0.16) | 4 (0.03) | 3 (0.02) | 3 (0.03) | 6 (0.06) |
| Chest Imaging | 9874 (61.80) | 4868 (33.89) | 3623 (27.85) | 2931 (25.02) | 5717 (54.57) |
| E&M | 6129 (38.36) | 9632 (67.05) | 9483 (72.90) | 8886 (75.85) | 9972 (95.19) |
| EBUS/mediastinoscopy | 28 (0.18) | 34 (0.24) | 23 (0.18) | 25 (0.21) | 75 (0.72) |
| Biopsya | 187 (1.17) | 157 (1.09) | 143 (1.10) | 96 (0.82) | 399 (3.81) |
| PET CT | 99 (0.62) | 101 (0.70) | 100 (0.77) | 62 (0.53) | 284 (2.71) |
| Brain MRI | 104 (0.65) | 148 (1.03) | 107 (0.82) | 95 (0.81) | 576 (5.50) |
| Bone scan | 7 (0.04) | 12 (0.08) | 21 (0.16) | 15 (0.13) | 77 (0.74) |
| SPN diagnosis | 15,978 (100.00) | 3597 (25.04) | 2432 (18.69) | 1818 (15.52) | 3558 (33.96) |
| Loss to follow up, N (%)b | 1612 (10.09) | 1357 (8.49) | 1294 (8.10) | 1239 (7.75) |
abiopsies do not include EBUS/mediastinoscopy
b% relative to the total number of cancer patients (N = 15,978)