Table 1.
Knowledge Questions Answered Correctly Before and After Viewing of the Patient Lung Cancer Screening Decision Aid (N=52)*
| Question (answer) | Before % |
After % |
|---|---|---|
| 1. Is lung cancer the second leading cause of cancer death in the US? (no) | 11.8 | 53.8 |
| 2. Is smoking responsible for more than half of all lung cancer deaths in US? (yes) | 71.2 | 94.2 |
| 3. Does having a low-dose CT decrease your chances of getting lung cancer? (no) | 25.5 | 82.4 |
| 4. Does having a low-dose CT decrease your chances of dying from lung cancer? (yes) | 21.2 | 74.5 |
| 5. If nothing is found on your CT scan should you repeat the scan in 6 months? (no) | 11.5 | 70.6 |
| 6. Is radiation exposure one of the harms of screening? (yes) | 37.3 | 86.3 |
| 7. Can a low-dose CT show that you have a tumor when you do not? (yes) | 13.5 | 84.6 |
| 8. Can a low-dose CT miss a tumor in your lungs? (yes) | 25.5 | 86.5 |
| 9. Will all tumors found in the lungs grow to be life threatening? (no) | 48.1 | 88.5 |
| 10. Should all current and former smokers be screened for lung cancer? (no) | 3.8 | 23.1 |
| 11. Can a low-dose CT find heart disease? (yes) | 13.5 | 86.3 |
| 12. Does a low-dose CT lower your chances of dying from lung cancer by 40%? (yes)** | 9.1 | 40.9 |
| 13. Will most people with suspicious cancer results actually be diagnosed with lung cancer? (no)** | 27.3 | 95.5 |
| 14. Will about a quarter of people screened with low-dose CT have a result that is suspicious for lung cancer? (yes)** | 18.2 | 81.8 |
The correct response to each question is given in parentheses. All before-and-after comparisons are significant at P<.01 using paired samples t-tests.
*
Subjects were cancer center patients in a tobacco treatment program who participated in the study between November 2011 and September 2012.
**
Risk questions administered in a subset of 22 participants.