Fig. 1
From: Air travel and incidence of pneumothorax in lymphangioleiomyomatosis
Probability of pneumothorax-free course after the first pneumothorax, according to treatment received for this pneumothorax. Each lung was considered as a separate observation. Probability of pneumothorax-free course was significantly lower after conservative treatment (C, grey solid line) than after chemical or surgical pleurodesis (P, black broken line) (p = 0.026, log-rank test). Grey areas reflect 5–95% confidence intervals. Data were censored at the date of questionnaire filling if a second pneumothorax did not occur. PT: pneumothorax