Table 3 Pneumothorax risk factors

Sex

0.40

0.30

0.23

0.09–1.76

Age

0.97

0.03

0.43

0.92–1.03

BMI

1.03

0.11

0.79

0.83–1.28

Height

0.97

0.05

0.67

0.88–1.07

Smoker

1.00

-

-

-

Smoking Pack years

1.18

0.14

0.15

0.94–1.47

Asthma

0.35

0.35

0.29

0.05–2.47

FEV₁/FVC absolute

0.92

0.05

0.16

0.83–1.03

FEV₁ % predicted

0.98

0.026

0.52

0.93–1.03

FVC % predicted

1.00

0.02

0.88

0.96–1.05

DLCO % predicted

0.98

0.017

0.24

0.95–1.01

Renal Cysts

1.33

1.23

0.75

0.22–8.22

Dermatologic findings

1.30

0.94

0.72

0.32–5.33

Cyst Number

 Few (<5 cysts)

0.51

0.47

0.47

0.08–3.14

 Numerous (>5)

1.96

1.82

0.47

0.32–12.1

Cyst Size

3.23

1.44

0.008

1.35–7.73

 0–2.9 cm diameter

0.06

0.06

0.003

0.01–0.40

 3–10 cm diameter

15.4

14.3

0.003

2.49–95.1

Cyst Distribution

0.62

0.22

0.18

0.30–1.25

Extent of Upper Lung

1.75

1.12

0.38

0.50–6.15

Zone Disease (% volume affected by cysts)

  < 25 % of UL

2.25

2.74

0.51

0.21–24.4

  > 25 % of UL

0.44

0.54

0.51

0.04–4.82

Extent of Lower Lung

6.43

4.96

0.016

1.41–29.2

Zone Disease (% volume affected by cysts)

  < 25 % of LL

0.25

0.22

0.12

0.04–1.45

  > 25 % of LL

4.57

3.89

0.07

0.88–23.7