Location of carcinomas and AAHs in each lobe
| Side | No. of lobes examined | No. of carcinomas1-150 | No. of AAH lesions | Frequency (%)1-151 |
| Right | ||||
| Upper lobe | 167 | 169 | 132 | 41 (25)1-164 |
| Middle lobe | 56 | 29 | 14 | 6 (11)1-164 |
| Lower lobe | 110 | 120 | 61 | 20 (18) |
| Left | ||||
| Upper lobe | 137 | 135 | 63 | 35 (26) |
| Lower lobe | 102 | 90 | 41 | 19 (19) |
| Central | 11 | |||
| All lung fields | 572 | 554 | 311 | 121 (21) |
AAH = atypical adenomatous hyperplasia.
↵1-150 Eleven were classified as central type because they could not be classified to specific lobes.
↵1-151 Frequency (%) = number of lobes in which AAH was present per number of lobes examined.
↵1-164 Statistically significant difference between right upper lobe and middle lobe (OR 2.7; CI 1.1 to 6.0) using logistic regression.