Figure 1.

Distribution of number of natural teeth (A) and pairs of natural teeth (B) with lung function.

Notes: In both males and females, the proportion of participants with full dentition and all pairs of natural teeth tended to decrease relative to the order of normal, restrictive, and obstructive group. The obstructive group showed considerable decreases versus the other groups. The proportion of individuals who had fewer than 20 natural teeth or fewer than 10 pairs of natural teeth showed a reverse pattern, in both males and females. Number and pairs of natural teeth showed the same pattern and distribution. However, males showed greater changes in the trend and distribution than females.