Table 3.
Relations between PDI lasting 30 s or more with clinical factors
| PDI sign | Total | ≤ 34 years of age, nonsmokers | ≤ 34 years of age, smokers | ≥ 55 years of age | Control group |
|---|---|---|---|---|---|
| PDI sign | |||||
| positive: negative | 48:90 | 33:31 | 12:9 | 0:26 | 3:24 |
| Sex | |||||
| Male:Female (positive/ negative) | 43/75:5/15 | 31/27:2/4 | 12/9:0/0 | 0/26:0/0 | 0/13:3/11 |
|
Right:Left (positive/ negative) |
24/47:24/43 | 16/16:17/15 | 6/3:6/6 | 0/16:0/10 | 2/12:1/12 |
| Asthma | |||||
|
Yes:No (positive/ negative) |
8/8:40/82 | 6/3:27/28 | 2/2:10/7 | 0/2:0/24 | 0/1:3/23 |
PDI: pulmonary delayed inflation
Nonsmokers 34 years of age or younger had a significantly higher incidence of PDI than patients 55 years of age or older (p < 0.0001), and patients in the control group (p = 0.0003). There was no significant difference between smoking and nonsmoking patients 34 years of age or younger (p = 0.8449)
Patients 34 years of age or younger who were smokers had a significantly higher incidence of the PDI sign than patients 55 years of age or older (p < 0.0001), and patients in the control group (p = 0.0013)