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Table 2 The relationship between comorbidities and recurrence

From: What factors predict recurrence of a spontaneous pneumothorax?

Comorbidity Rec Non-rec
Interstitial pneumonia 7 9
HPa 0 3
BAb 0 3
Emphysema 0 3
Hematothorax 2 2
COPDc 0 2
Giant bulla 0 2
Hemophilia 0 2
Benign lung tumor 0 2
Empyema 2 0
RAd 3 0
Lung cancer 1 1
Catamenial pneumothorax 1 1
Extraocular myositis 0 1
Angiosarcoma 0 1
SLEe 0 1
AMf 0 1
Cystic disease of the lung 0 1
  1. a HP: hypersensitivity pneumonia, b BA: bronchial asthma, c COPD: chronic obstructive pulmonary disease, d RA: rheumatoid arthritis e SLE: systemic lupus erythematosis, fAM: atypical mycobacteriosis, Some subjects had several comorbidities.