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Table 3 Incidence of PT during post-flight and non-flight periods

From: Air travel and incidence of pneumothorax in lymphangioleiomyomatosis

Start of exposure period Exposure period type Exposure period duration (lung-yr) Number of PT during exposure period PT incidence per lung per yr (CI) Risk ratio (CI)
first symptoms of LAM total 1835.4 119 0.065 (0.054–0.077)  
non-flight 1808.6 113 0.062 (0.052–0.075) 3.58 (1.40–7.45)
30 days post-flight 26.8 6 0.223 (0.089–0.453)
LAM diagnosis total 930.7 43 0.046 (0.034–0.061)  
non-flight 909.7 40 0.044 (0.032–0.059) 3.25 (0.79–8.93)
30 days post-flight 21.0 3 0.143 (0.035–0.370)
  1. CI confidence interval