Do Atmospheric Changes and the Synodic Lunar Cycle Affect the Development of Spontaneous Pneumothorax ?

Abstract

Background: Pneumothorax is defined as air in pleural space. The etiology of spontaneous pneumothorax (SP) is still under investigation and, despite many studies, remains uncertain. The aim of this study was to investigate the effects of the lunar cycle and daily weather changes on SP development.Methods: The data of patients admitted to our clinic with SP were analysed retrospectively. The daily atmospheric pressure, relative ratio of humidity and temperature in degrees Celsius of each day were obtained. The mean values for each day, from the first to the 29th day, of the synodic lunar cycle (SLC) were calculated for the five-year study period. The attacks were allocated to the appropriate day of an ideal 29-day SLC, irrespective of the calendar date. Results: A total of 131 patients who were admitted to our hospital with SP (130 males and 1 female with an average age of 32.4 ± 12.2) were included in this study. The number of patients with SP showed a statistically significant correlation with mean atmospheric pressure (p = 0.005), relative humidity (p = 0.007) and outdoor temperature (p = 0.02) but not with the SLC.Conclusions: SP is significantly influenced by weather-related factors. Changes in atmospheric pressure, humidity and outdoor temperature had obvious effects on the development of SP. However, the SLC had no effect on SP.