Mean and SD of Zone and Total Lung Counts for Cigarette Smokers and Nonsmokers
| Zone | Smokers* | Nonsmokers* | ||||
|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | |||
| Upper | 608.9 | 768.1 | 669.1 | 505.7 | ||
| Middle | 1,188.5 | 1,698.7 | 1,589.0 | 1,386.2 | ||
| Lower | 1,300.4 | 1,728.9 | 1,612.1 | 1,443.5 | ||
| Total | 6,375.3 | 8,466.1 | 7,737.4 | 6,706.6 | ||
↵* Nonsignificant difference (independent-samples t test).