Finding | Probability of this finding among men with: | Likelihood ratio for malignancy* | |
Malignant nodules | Benign nodules | ||
Diameter of nodule, cm | |||
<1.5 | 0.026 | 0.232 | 0.1 |
1.5-2.2 | 0.255 | 0.501 | 0.5 |
2.3-3.2 | 0.343 | 0.203 | 1.7 |
3.3-4.2 | 0.193 | 0.045 | 4.3 |
4.3-5.2 | 0.118 | 0.018 | 6.6 |
5.3-6.0 | 0.065 | 0.002 | 29.4 |
Patient's age, yr | |||
≤35 | 0.011 | 0.155 | 0.1 |
36-44 | 0.111 | 0.329 | 0.3 |
45-49 | 0.096 | 0.136 | 0.7 |
50-59 | 0.2 | 0.138 | 1.5 |
60-69 | 0.454 | 0.22 | 2.1 |
70-83 | 0.129 | 0.023 | 5.7 |
Smoking history | |||
Never smoked | 0.03 | 0.21 | 0.15 |
Pipe or cigar only | 0.05 | 0.15 | 0.3 |
Ever smoked cigarettes | 0.92 | 0.63 | 1.5 |
Current smoker or quit within past 9 yr | |||
Average number of cigarettes per day: | |||
1-9 | 0.03 | 0.1 | 0.3 |
10-20 | 0.27 | 0.27 | 1 |
21-40 | 0.38 | 0.19 | 2 |
≥41 | 0.24 | 0.06 | 3.9 |
Quit smoking, yr | |||
≤3 | 0.07 | 0.05 | 1.4 |
4-6 | 0.04 | 0.04 | 1 |
7-12 | 0.04 | 0.07 | 0.5 |
≥13 | 0.02 | 0.19 | 0.1 |
Overall prevalence | |||
Clinical settings | (0.4) | 0.7• | |
Community surveys | (0.1) | 0.1 |
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