PDI sign | Total | ≤ 34 years of age, nonsmokers | ≤ 34 years of age, smokers | ≥ 55 years of age | Control group |
---|---|---|---|---|---|
PDI sign | |||||
Positive | 78 | 52 | 17 | 5 | 4 |
Upper lobe | 75 | 52 | 17 | 2 | 4 |
Lower lobe | 3 | 0 | 0 | 3 | 0 |
Negative | 60 | 12 | 4 | 21 | 23 |
Sex | |||||
Male positive (upper)/ negative | 66/52 | 46/12 | 17/4 | 2/24 | 1/12 |
Female positive (upper)/ negative | 9/11 | 6/0 | 0/0 | 0/0 | 3/11 |
Laterality | |||||
Right positive (upper)/ negative | 38/33 | 27/5 | 7/2 | 1/15 | 3/11 |
Left positive (upper)/ negative | 37/30 | 25/7 | 10/2 | 1/9 | 1/12 |
Asthma | |||||
Yes positive (upper)/ negative | 10/6 | 7/2 | 3/1 | 0/2 | 0/1 |
No positive (upper)/ negative | 65/57 | 45/10 | 14/3 | 2/22 | 4/22 |