Table 3 Factors influencing whether patients with SPN undergo at least one invasive test (Odds ratio [OR] and 95% confidence interval [CI]).
Factor | n | Unadjusted OR of receiving invasive test (CI)* | Adjusted OR of receiving invasive test (CI)+ | P $ |
|---|---|---|---|---|
Patient characteristics | ||||
Age | ||||
35–65 | 52 | 0.8 (0.3–1.7) | 1.5 (0.5–4.3) | 0.38 |
> 65 | 60 | 1 | 1 | |
Sex | ||||
Male | 82 | 2.9 (1.2–7.2) | 0.5 (0.1–3.8) | 0.57 |
Female | 30 | 1 | 1 | |
Referral pattern | ||||
Specialist | 94 | 4.1 (1.2–13.5) | 6.6 (1.4–30.3) | 0.01 |
GP | 18 | 1 | 1 | |
History of smoking | ||||
Current or past smoker | 79 | 19.2 (5.3–68.8) | 32.9 (4.3–247.7) | <0.01 |
Never smoked | 33 | 1 | 1 | |
Nodule characteristics | ||||
Calcification within the nodule | ||||
Yes | 12 | 0.1 (0.1–0.8) | 0.5 (0.1–4.2) | 0.54 |
No | 100 | 1 | 1 | |
Spiculated nodule | ||||
Yes | 32 | 4.7 (1.8–11.8) | 5.7 (1.6–19.5) | <0.01 |
No | 80 | 1 | 1 | |
Mediastinal involvement | ||||
Yes | 31 | 1.9 (0.8–4.6) | 1.4 (0.4–4.3) | 0.49 |
No | 81 | 1 | 1 |