Burden of obstructive lung disease in a rural setting in the Philippines

Idolor, Luisito F.; Guia, Teresita S. De; Francisco, Norberto A.; Roa, Camilo; Ayuyao, Fernando; Tady, Cecil Z.; Tan, D.T.S.; Banal-Yang, Sylvia; Balanag, Vincent M.; Reyes, Maria Teresita N.; Dantes, Renato B.

doi:10.1111/j.1440-1843.2011.02027.x

Cited by 45 publications

(39 citation statements)

References 35 publications

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“…In contrast to the pooled BOLD analysis, an analysis of 722 subjects from the rural Philippines with a high prevalence of TB revealed a risk of AFO in patients with previous PTB of 6.31 (95% CI 2.67-15.0) [22]. …”

Section: Resultsmentioning

confidence: 99%

A Systematic Review of the Association between Pulmonary Tuberculosis and the Development of Chronic Airflow Obstruction in Adults

Allwood

Myer

Bateman³

2013

Respiration

124

109

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Background: Chronic obstructive pulmonary disease (COPD) is a major public health concern, accounting for 3 million deaths annually, 90% of which occur in low- and middle-income countries. Pulmonary tuberculosis (PTB) as a contributory factor in the aetiology of COPD is under debate, with most epidemiologic evidence suggesting a positive association. Objectives: To compile a systematic review of evidence for an association between PTB and the development of chronic airflow obstruction (CAO). Methods: We performed a systematic review of original English-language, peer-reviewed literature using the PubMed/MEDLINE database. CAO was defined by spirometry [FEV₁:FVC ratio <0.70 or

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Section: Resultsmentioning

confidence: 99%

A Systematic Review of the Association between Pulmonary Tuberculosis and the Development of Chronic Airflow Obstruction in Adults

Allwood

Myer

Bateman³

2013

Respiration

124

109

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“…In 2010, air pollution resulted in 3.2 million premature deaths worldwide mainly due to cardiovascular disease and 223,000 deaths from lung cancer (Lim et al, 2012;IARC, 2013). Biomass-burning smoke and associated air pollutants typically reach a peak level during the pre-monsoon season in SEA and biomass burning has been related to the development of chronic obstructive pulmonary disease (Idolor et al, 2011). However, the emissions over SEA have garnered less attention than those in other tropical regions .…”

Section: Air Quality and Implications To Healthmentioning

confidence: 99%

Satellite-Surface Perspectives of Air Quality and Aerosol-Cloud Effects on the Environment: An Overview of 7-SEAS/BASELInE

Tsay

Maring²,

Lin

et al. 2016

Aerosol Air Qual. Res.

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The objectives of 7-SEAS/BASELInE (Seven SouthEast Asian Studies/Biomass-burning Aerosols & Stratocumulus Environment: Lifecycles & Interactions Experiment) campaigns in spring 2013-2015 were to synergize measurements from uniquely distributed ground-based networks (e.g., AERONET, MPLNET) and sophisticated platforms (e.g., SMARTLabs, regional contributing instruments), along with satellite observations/retrievals and regional atmospheric transport/chemical models to establish a critically needed database, and to advance our understanding of biomass-burning aerosols and trace gases in Southeast Asia (SEA). We present a satellite-surface perspective of 7-SEAS/BASELInE and highlight scientific findings concerning: (1) regional meteorology of moisture fields conducive to the production and maintenance of low-level stratiform clouds over land, (2) atmospheric composition in a biomass-burning environment, particularly tracers/markers to serve as important indicators for assessing the state and evolution of atmospheric constituents, (3) applications of remote sensing to air quality and impact on radiative energetics, examining the effect of diurnal variability of boundary-layer height on aerosol loading, (4) aerosol hygroscopicity and ground-based cloud radar measurements in aerosol-cloud processes by advanced cloud ensemble models, and (5) implications of air quality, in terms of toxicity of nanoparticles and trace gases, to human health. This volume is the third 7-SEAS special issue (after Atmospheric Research, vol. 122, 2013; and Atmospheric Environment, vol. 78, 2013) and includes 27 papers published, with emphasis on air quality and aerosol-cloud effects on the environment. BASELInE observations of stratiform clouds over SEA are unique, such clouds are embedded in a heavy aerosol-laden environment and feature characteristically greater stability over land than over ocean, with minimal radar surface clutter at a high vertical spatial resolution. To * Corresponding author.Tel.: +13016146188; Fax: +13016146307 E-mail address: si-chee.tsay@nasa.gov ** Corresponding author.Tel./Fax: +886-3-4254069 E-mail address: nhlin@cc.ncu.edu.tw Tsay et al., Aerosol and Air Quality Research, 16: 2581-2602, 2016 2582 facilitate an improved understanding of regional aerosol-cloud effects, we envision that future BASELInE-like measurement/modeling needs fall into two categories: (1) efficient yet critical in-situ profiling of the boundary layer for validating remote-sensing/retrievals and for initializing regional transport/chemical and cloud ensemble models, and (2) fully utilizing the high observing frequencies of geostationary satellites for resolving the diurnal cycle of the boundarylayer height as it affects the loading of biomass-burning aerosols, air quality and radiative energetics.

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“…[3][4][5][6] In some studies, this association is almost as strong as that for cigarette smoking. [5][6][7] In a community-based study performed in South Africa (SA), 49.2% of adults aged ≥40 years who reported a history of PTB had evidence of CAL (Global Initiative for Chronic Obstructive Lung Disease (GOLD) stage 1 or higher). [8] The mechanisms responsible for CAL following PTB are unclear.…”

Section: Researchmentioning

confidence: 99%

Obstructive pulmonary disease in patients with previous tuberculosis: Pathophysiology of a community-based cohort

et al. 2017

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Background. An association between chronic airflow limitation (CAL) and a history of pulmonary tuberculosis (PTB) has been confirmed in epidemiological studies, but the mechanisms responsible for this association are unclear. It is debated whether CAL in this context should be viewed as chronic obstructive pulmonary disease (COPD) or a separate phenotype. Objective. To compare lung physiology and high-resolution computed tomography (HRCT) findings in subjects with CAL and evidence of previous (healed) PTB with those in subjects with smoking-related COPD without evidence of previous PTB. Methods. Subjects with CAL identified during a Burden of Obstructive Lung Disease (BOLD) study performed in South Africa were studied. Investigations included questionnaires, lung physiology (spirometry, body plethysmography and diffusing capacity) and quantitative HRCT scans to assess bronchial anatomy and the presence of emphysema (<-950 HU), gas trapping (<-860 HU) and fibrosis (>-200 HU). Findings in subjects with a past history and/or HRCT evidence of PTB were compared with those in subjects without these features. Results. One hundred and seven of 196 eligible subjects (54.6%) were enrolled, 104 performed physiology tests and 94 had an HRCT scan. Based on history and HRCT findings, subjects were categorised as no previous PTB (NPTB, n=31), probable previous PTB (n=33) or definite previous PTB (DPTB, n=39). Subjects with DPTB had a lower diffusing capacity (Δ=-17.7%; p=0.001) and inspiratory capacity (Δ=-21.5%; p=0.001) than NPTB subjects, and higher gas-trapping and fibrosis but not emphysema scores (Δ=+6.2% (p=0.021), +0.36% (p=0.017) and +3.5% (p=0.098), respectively). Conclusions. The mechanisms of CAL associated with previous PTB appear to differ from those in the more common smoking-related COPD and warrant further study.

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Burden of obstructive lung disease in a rural setting in the Philippines

Cited by 45 publications

References 35 publications

A Systematic Review of the Association between Pulmonary Tuberculosis and the Development of Chronic Airflow Obstruction in Adults

A Systematic Review of the Association between Pulmonary Tuberculosis and the Development of Chronic Airflow Obstruction in Adults

Satellite-Surface Perspectives of Air Quality and Aerosol-Cloud Effects on the Environment: An Overview of 7-SEAS/BASELInE

Obstructive pulmonary disease in patients with previous tuberculosis: Pathophysiology of a community-based cohort

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