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Table 4 Relationship between incidence of pneumothorax and different types of pulmonary function abnormalities

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

  Pneumothorax X2 P Value
Yes* No*
Normal ventilation function 18 (10.7%) 150 (89.3%)   
Small airway dysfunctionsδ 10 (14.5%) 59 (85.5%) 0.670 0.413
Types of function abnormalitiesδ     
 Obstructive function abnormalities 18 (24.7%) 55 (75.3%) 7.786 0.005
 Restrictive function abnormalities 1 (9.1%) 10 (90.9%) 0 1.000
 Mixed function abnormalities 3 (13.6%) 19 (86.4%) 0.002 0.961
  1. Significant difference (P<0.05) are shown in bold
  2. % pred percent predicted
  3. *Data are presented as number
  4. δEach group compared with normal ventilation function group