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Association of Sand Dust Particles with Pulmonary Function and Respiratory Symptoms in Adult Patients with Asthma in Western Japan Using Light Detection and Ranging: A Panel Study.

Watanabe M, Noma H, Kurai J, Shimizu A, Sano H, Kato K, Mikami M, Ueda Y, Tatsukawa T, Ohga H, Yamasaki A, Igishi T, Kitano H, Shimizu E - Int J Environ Res Public Health (2015)

Bottom Line: Elevated sand dust particles levels were significantly associated with the symptom score (0.04; 95% confidence interval (CI); 0.03, 0.05), and this increase persisted for 5 days.There was no significant association between PEF and heavy dust exposure (0.01 L/min; 95% CI, -0.62, 0.11).The present study found that sand dust particles were significantly associated with worsened lower respiratory tract symptoms in adult patients with asthma, but not with pulmonary function.

View Article: PubMed Central - PubMed

Affiliation: Department of Respiratory Medicine and Rheumatology, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago 683-8504, Japan. watanabm@grape.med.tottori-u.ac.jp.

ABSTRACT
Light detection and ranging (LIDAR) can estimate daily volumes of sand dust particles from the East Asian desert to Japan. The objective of this study was to investigate the relationship between sand dust particles and pulmonary function, and respiratory symptoms in adult patients with asthma. One hundred thirty-seven patients were included in the study. From March 2013 to May 2013, the patients measured their morning peak expiratory flow (PEF) and kept daily lower respiratory symptom diaries. A linear mixed model was used to estimate the correlation of the median daily levels of sand dust particles, symptoms scores, and PEF. A heavy sand dust day was defined as an hourly concentration of sand dust particles of >0.1 km(-1). By this criterion, there were 8 heavy sand dust days during the study period. Elevated sand dust particles levels were significantly associated with the symptom score (0.04; 95% confidence interval (CI); 0.03, 0.05), and this increase persisted for 5 days. There was no significant association between PEF and heavy dust exposure (0.01 L/min; 95% CI, -0.62, 0.11). The present study found that sand dust particles were significantly associated with worsened lower respiratory tract symptoms in adult patients with asthma, but not with pulmonary function.

No MeSH data available.


Related in: MedlinePlus

Sand dust particle and aerosolized air pollutant levels (A) Daily median levels of sand dust particles (open circles) and aerosolized air pollutants (closed squares). A heavy dust day was defined as an hourly sand dust particle level >0.1 km−1 using light detection and ranging data. Arrows indicate heavy dust days; (B) The time above 0.1 km−1 was based on hourly levels. Eight heavy dust days, 7–10 March, 17 March, 20 March, 6 April, and 30 April, occurred during the study period.
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ijerph-12-13038-f002: Sand dust particle and aerosolized air pollutant levels (A) Daily median levels of sand dust particles (open circles) and aerosolized air pollutants (closed squares). A heavy dust day was defined as an hourly sand dust particle level >0.1 km−1 using light detection and ranging data. Arrows indicate heavy dust days; (B) The time above 0.1 km−1 was based on hourly levels. Eight heavy dust days, 7–10 March, 17 March, 20 March, 6 April, and 30 April, occurred during the study period.

Mentions: The daily levels of sand dust particles and aerosolized air pollutants over the study period are shown in Figure 2A. The Daily levels were not calculated during 7 days of the study period (1, 19, and 25 March; 6, 7, and 24 April; and 19 May). The rate of missing 15-min measurement intervals from 1 March to 31 May was 11.8%. Figure 2B shows the mean time above 0.1/km−1 during the 8 heavy dust days. Sand dust particles were significantly associated with SPM and PM2.5 (Figure 3).


Association of Sand Dust Particles with Pulmonary Function and Respiratory Symptoms in Adult Patients with Asthma in Western Japan Using Light Detection and Ranging: A Panel Study.

Watanabe M, Noma H, Kurai J, Shimizu A, Sano H, Kato K, Mikami M, Ueda Y, Tatsukawa T, Ohga H, Yamasaki A, Igishi T, Kitano H, Shimizu E - Int J Environ Res Public Health (2015)

Sand dust particle and aerosolized air pollutant levels (A) Daily median levels of sand dust particles (open circles) and aerosolized air pollutants (closed squares). A heavy dust day was defined as an hourly sand dust particle level >0.1 km−1 using light detection and ranging data. Arrows indicate heavy dust days; (B) The time above 0.1 km−1 was based on hourly levels. Eight heavy dust days, 7–10 March, 17 March, 20 March, 6 April, and 30 April, occurred during the study period.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4627015&req=5

ijerph-12-13038-f002: Sand dust particle and aerosolized air pollutant levels (A) Daily median levels of sand dust particles (open circles) and aerosolized air pollutants (closed squares). A heavy dust day was defined as an hourly sand dust particle level >0.1 km−1 using light detection and ranging data. Arrows indicate heavy dust days; (B) The time above 0.1 km−1 was based on hourly levels. Eight heavy dust days, 7–10 March, 17 March, 20 March, 6 April, and 30 April, occurred during the study period.
Mentions: The daily levels of sand dust particles and aerosolized air pollutants over the study period are shown in Figure 2A. The Daily levels were not calculated during 7 days of the study period (1, 19, and 25 March; 6, 7, and 24 April; and 19 May). The rate of missing 15-min measurement intervals from 1 March to 31 May was 11.8%. Figure 2B shows the mean time above 0.1/km−1 during the 8 heavy dust days. Sand dust particles were significantly associated with SPM and PM2.5 (Figure 3).

Bottom Line: Elevated sand dust particles levels were significantly associated with the symptom score (0.04; 95% confidence interval (CI); 0.03, 0.05), and this increase persisted for 5 days.There was no significant association between PEF and heavy dust exposure (0.01 L/min; 95% CI, -0.62, 0.11).The present study found that sand dust particles were significantly associated with worsened lower respiratory tract symptoms in adult patients with asthma, but not with pulmonary function.

View Article: PubMed Central - PubMed

Affiliation: Department of Respiratory Medicine and Rheumatology, Tottori University Faculty of Medicine, 36-1 Nishi-cho, Yonago 683-8504, Japan. watanabm@grape.med.tottori-u.ac.jp.

ABSTRACT
Light detection and ranging (LIDAR) can estimate daily volumes of sand dust particles from the East Asian desert to Japan. The objective of this study was to investigate the relationship between sand dust particles and pulmonary function, and respiratory symptoms in adult patients with asthma. One hundred thirty-seven patients were included in the study. From March 2013 to May 2013, the patients measured their morning peak expiratory flow (PEF) and kept daily lower respiratory symptom diaries. A linear mixed model was used to estimate the correlation of the median daily levels of sand dust particles, symptoms scores, and PEF. A heavy sand dust day was defined as an hourly concentration of sand dust particles of >0.1 km(-1). By this criterion, there were 8 heavy sand dust days during the study period. Elevated sand dust particles levels were significantly associated with the symptom score (0.04; 95% confidence interval (CI); 0.03, 0.05), and this increase persisted for 5 days. There was no significant association between PEF and heavy dust exposure (0.01 L/min; 95% CI, -0.62, 0.11). The present study found that sand dust particles were significantly associated with worsened lower respiratory tract symptoms in adult patients with asthma, but not with pulmonary function.

No MeSH data available.


Related in: MedlinePlus