{
  "abstract": "Introduction and Objectives Daily fluctuations in weather parameters have been suggested as possible triggers for spontaneous pneumothorax (SP). 1 2 However, there is no strong evidence to confirm this hypothesis. This study was designed to assess the correlation between daily local weather parameters and occurrence of SP.Methods Retrospective observational study of 119 (Males=88, Females=31, mean age= 51.2 years) cases of primary and secondary spontaneous pneumothorax from 1st January 2020 to 31st December 2024, was conducted covering a specific geographical area. Weather data including daily values for mean, maximum, and minimum temperature, rainfall, wind speed, and atmospheric pressure, were obtained from open-meteo API, open access platform which provides historical information regarding local climate changes. Weather parameters on the days when SP were presented were compared with no SP presented, using independent sample t-tests. Seasonal variation was assessed using chi-square analysis. Logistic regression analysis performed to assess correlation between different weather parameters on a day (D-1) prior to the date of presentation and two days prior (D-2) to the date of presentation.Results There were no statistically significant differences were found between SP and non-SP days for any of the weather parameters, including mean temperature (p=0.06), maximum temperature (p=0.13), minimum temperature (p=0.10), rainfall (p=0.89), wind speed (p=0.33), atmospheric pressure (p=0.47) or pressure range (p=0.64). Seasonal distribution of SP also showed no significant variation (χ 2 p=0.85). There was no association found with any of the weather parameters on D-1 or D-2 (all p-values >0.05).Abstract P84 Table 1Seasonal variation of presentation of spontaneous pneumothorax and weather parameters (2020–2024)Conclusion There was no significant correlation was found between spontaneous pneumothorax and weather parameters. Limitations include the single-centre design and limited number of subjects. Daily weather data may not reflect microclimatic data of the locality which may or may not related to occurrence of spontaneous pneumothorax.References Liu YW, Kao CN, Ho CC, et al. Effect of environmental factors on postoperative recurrent primary spontaneous pneumothorax: a case-crossover study. Respir Res. 2025;26:176.Haberal MA, Akar E, Dikiş ÖŞ, Özkaya M, Ay MO, Kaya H, Yüksel M. Effects of atmospheric changes on spontaneous pneumothorax. Eurasian J Emerg Med. 2022 Sep;21(3):176–182. doi: 10.4274/eajem.galenos.2021.68725.",
  "authors": [
    {
      "affiliations": [
        "Royal Preston Hospital, Preston, UK"
      ],
      "name": "M Vele Witharamalage"
    },
    {
      "affiliations": [
        "Royal Preston Hospital, Preston, UK"
      ],
      "name": "S Gudur"
    }
  ],
  "title": "P84 Weather changes and the incidence of spontaneous pneumothorax: an observational study from a single UK centre",
  "uid": "3eb82d17-f4b5-532e-9067-94ba07052da8"
}