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Table 3 Differences in pulmonary function between groups with and without pneumothorax evaluated by univariate analysis*

From: The role of clinical characteristics and pulmonary function testing in predicting risk of pneumothorax by CT-guided percutaneous core needle biopsy of the lung

Clinical characteristics

All patients studied

Pneumothorax

 

Median

Lower quartile –upper quartile

Yes*

No*

Z

P Value

No. of cases analyzed

343

 

50 (14.6%)

293 (85.4%)

  

Pulmonary function characteristics

      

 FVC (% pred)

103.3

92.0–115.5

105.0 (93.3–114.8)

103.0 (91.6–115.7)

− 0.363

0.716

 FEV1 (L)

2.4

2.0–2.9

2.4 (1.9–2.7)

2.4 (2.0–3.0)

− 0.700

0.484

 FEV1 (% pred)

98.0

81.7–109.9

94.8 (79.4–106.8)

98.4 (82.0–110.1)

− 1.101

0.271

 FEV1/FVC ratio (%)

76.0

69.1–81.2

72.5 (67.1–78.4)

76.6 (69.8–81.5)

− 2.897

0.004

 FEF25% (% pred)

88.4

64.0–106.1

73.5 (56.5–102.5)

89.5 (66.6–106.5)

− 1.950

0.051

 FEF50% (% pred)

72.8

48.9–94.6

58.5 (39.8–84.5)

77.5 (51.7–95.9)

− 2.458

0.014

 FEF75% (% pred)

66.4

44.7–89.9

55.7 (42.1–79.4)

70.5 (45.4–91.1)

− 2.085

0.037

 FEF25–75% (% pred)

58.0

37.4–78.6

44.3 (30.0–66.3)

59.6 (39.4–79.8)

− 2.134

0.033

 PEF (% pred)

104.4

84.4–119.6

101.5 (83.2–114.7)

104.5 (85.0–121.0)

− 1.253

0.210

 MVV (% pred)

95.7

83.3–111.9

96.4 (83.6–109.2)

95.5 (83.2–112.7)

− 0.382

0.703

  1. Significant difference (P<0.05) are shown in bold
  2. *Data are shown as median (lower quartile to upper quartile)
  3. Mann–Whitney U test. All the quantitative data showed non-normal distribution by Shapiro–Wilk test