Table - eBox 3. Derivation of the number needed to harm (NNH).
| Complications | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Low dose CT | Chest radiography | Persons | Risk | NNH | |||||
| Lung cancer | Confirmed | Not confirmed | Confirmed | Not confirmed | CT | Chest radiography | CT | Chest radiography | |
| NNH derivation with chest radiography screening | |||||||||
| Major | 75 | 12 | 24 | 4 | 26722 | 26732 | 0.00325574 | 0.00104743 | 453 |
| Intermediate | 95 | 44 | 35 | 9 | 26722 | 26732 | 0.00520171 | 0.00164597 | 281 |
| Minor | 14 | 5 | 6 | 3 | 26722 | 26732 | 0.00071102 | 0.00033668 | 2671 |
| At least one complication | 184 | 61 | 65 | 16 | 26722 | 26732 | 0.00916848 | 0.00303008 | 163 |
| Death | 10 | 11 | 11 | 3 | 26722 | 26732 | 0.00078587 | 0.00052372 | 3815 |
| NNH derivation without chest radiography screening | |||||||||
| Major | 75 | 12 | 24 | 4 | 26722 | 26732 | 0.00325574 | 0 | 307 |
| Intermediate | 95 | 44 | 35 | 9 | 26722 | 26732 | 0.00520171 | 0 | 192 |
| Minor | 14 | 5 | 6 | 3 | 26722 | 26732 | 0.00071102 | 0 | 1406 |
| At least one complication | 184 | 61 | 65 | 16 | 26722 | 26732 | 0.00916848 | 0 | 109 |
| Death | 10 | 11 | 11 | 3 | 26722 | 26732 | 0.00078587 | 0 | 1272 |
CT, computed tomography