Pulmonary Function Tests in Thunderstorm-associated Respiratory Symptoms: A Cross-sectional Study.

IF 1.6 Q2 MEDICINE, GENERAL & INTERNAL Iranian Journal of Medical Sciences Pub Date : 2024-01-01 DOI:10.30476/ijms.2023.96337.2784
Maryam Haddadzadeh Shoushtari, Sakineh Afrakhteh, Seyed Hamid Borsi, Hanieh Raji, Esmail Idani
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Abstract

Background: Epidemic thunderstorm asthma is an observed increase in cases of acute bronchospasm following thunderstorms. This study aimed to compare the frequency of obstructive airway disease or bronchial hyperresponsiveness in subjects with thunderstorm-associated respiratory symptoms with subjects with similar symptoms presented at other times.

Methods: A cross-sectional study from June to November of 2013 was conducted on subjects with thunderstorm-associated respiratory symptoms living in Ahvaz City, Iran. Thunderstorm-associated subjects were presented with asthmatic symptoms in thunderstorms, and other patients presented with similar symptoms at other times. Baseline spirometry was performed on patients to examine the presence of obstructive airway disease. In all patients with normal spirometry, a provocation test was applied. A comparison of qualitative and quantitative variables was made using the Chi-square and independent t test, respectively. All analyses were carried out using SPSS Statistics Version 22. A P value less than 0.05 was considered statistically significant.

Results: Out of 584 subjects, 300 and 284 participants were in thunderstorm-associated and non-thunderstorm-associated groups, respectively. After the final analysis, 87 (30.6%) and 89 (33.3%) of the thunderstorm-associated subjects and non-thunderstorm-associated group, respectively, had pieces of evidence of airflow limitation (P=0.27). Among the patients with normal spirometry, 161 (81.72%) of the thunderstorm-associated patients and 100 (56.17%) patients of the non-thunderstorm-associated symptoms group had a positive methacholine challenge test result (P<0.001).

Conclusion: Most of the patients with thunderstorm-associated respiratory symptoms had no obvious evidence of airflow limitation in spirometry.

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雷暴相关呼吸道症状中的肺功能测试:横断面研究
背景:流行性雷暴哮喘是指在雷暴后急性支气管痉挛病例增多。本研究旨在比较雷暴相关呼吸道症状患者与其他时间出现类似症状的患者患阻塞性气道疾病或支气管高反应性疾病的频率:2013年6月至11月,对居住在伊朗阿瓦士市的雷暴相关呼吸道症状受试者进行了横断面研究。雷暴相关受试者在雷暴时出现哮喘症状,其他患者在其他时间出现类似症状。对患者进行了基线肺活量测定,以检查是否存在阻塞性气道疾病。所有肺活量正常的患者都接受了激发试验。定性和定量变量的比较分别采用了卡方检验和独立 t 检验。所有分析均使用 SPSS 统计软件版本 22 进行。P 值小于 0.05 视为具有统计学意义:在 584 名受试者中,雷暴相关组和非雷暴相关组分别有 300 人和 284 人。经过最终分析,雷暴相关组和非雷暴相关组分别有 87 人(30.6%)和 89 人(33.3%)有气流受限的证据(P=0.27)。在肺活量正常的患者中,161 名(81.72%)雷暴相关症状组患者和 100 名(56.17%)非雷暴相关症状组患者的甲基胆碱挑战试验结果呈阳性(P=0.27):大多数雷暴相关呼吸道症状患者在肺活量测定中没有明显的气流受限证据。
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来源期刊
Iranian Journal of Medical Sciences
Iranian Journal of Medical Sciences MEDICINE, GENERAL & INTERNAL-
CiteScore
3.20
自引率
0.00%
发文量
84
审稿时长
12 weeks
期刊介绍: The Iranian Journal of Medical Sciences (IJMS) is an international quarterly biomedical publication, which is sponsored by Shiraz University of Medical Sciences. The IJMS intends to provide a scientific medium of com­muni­cation for researchers throughout the globe. The journal welcomes original clinical articles as well as clinically oriented basic science re­search experiences on prevalent diseases in the region and analysis of various regional problems.
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