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Grade distribution in each of the six lung zones
| Grade 1 | Grade 2 | Grade 3 | Grade 4 | Total | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Zone | R %(n) | L %(n) | R %(n) | L %(n) | R%(n) | L%(n) | R%(n) | L%(n) | R %(n) | L %(n) |
| Upper | 48 (21) | 41(18) | 18 (8) | 21 (9) | 5 (2) | 7 (3) | 16 (7) | 11(5) | 86.4(38) | 79.5(35) |
| Middle | 50 (22) | 39 (17) | 25 (11) | 27 (12) | 7(3) | 2 (1) | 0 (0) | 2 (1) | 81.8(36) | 70.5(31) |
| Lower | 52 (23) | 41(18) | 30 (13) | 27 (12) | 0(0) | 2 (1) | 0(0) | 2 (1) | 81.8(36) | 72.7(32) |
