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Table 3 Relations between PDI lasting 30 s or more with clinical factors

From: A novel finding related to bulla and bleb formation in patients with primary spontaneous pneumothorax

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

  1. PDI: pulmonary delayed inflation
  2. 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)
  3. 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)
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BMC Pulmonary Medicine

ISSN: 1471-2466

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