respectively, and the chest expansion (X ± SD) of groups I and
II were 5.34 ± 0.71 em. and 5.66 ± 0.68 em., respectively (Table 3,
Figure 1). These results revealed that the two sets of parameters
for both groups were statistically different. It indicated that the
difference in air pollution in both groups influenced the
plumonary function of the groups,