Cited by 139Energy and Environment ImpactsAir Quality and Health ImpactsIndoor Air Quality and Microbial Exposure

The health and social implications of household air pollution and respiratory diseases

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Simkovich, Suzanne M., Goodman, Dina, Roa, Christian, Crocker, Mary E., Gianella, Gonzalo E., Kirenga, Bruce J., Wise, Robert A., Checkley, William·2019·npj Primary Care Respiratory Medicine

Abstract

Approximately three billion individuals are exposed to household air pollution (HAP) from the burning of biomass fuels worldwide. Household air pollution is responsible for 2.9 million annual deaths and causes significant health, economic and social consequences, particularly in low- and middle-income countries. Although there is biological plausibility to draw an association between HAP exposure and respiratory diseases, existing evidence is either lacking or conflicting. We abstracted systematic reviews and meta-analyses for summaries available for common respiratory diseases in any age group and performed a literature search to complement these reviews with newly published studies. Based on the literature summarized in this review, HAP exposure has been associated with acute respiratory infections, tuberculosis, asthma, chronic obstructive pulmonary disease, pneumoconiosis, head and neck cancers, and lung cancer. No study, however, has established a causal link between HAP exposure and respiratory disease. Furthermore, few studies have controlled for tobacco smoke exposure and outdoor air pollution. More studies with consistent diagnostic criteria and exposure monitoring are needed to accurately document the association between household air pollution exposure and respiratory disease. Better environmental exposure monitoring is critical to better separate the contributions of household air pollution from that of other exposures, including ambient air pollution and tobacco smoking. Clinicians should be aware that patients with current or past HAP exposure are at increased risk for respiratory diseases or malignancies and may want to consider earlier screening in this population.

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  1. [1]Hay, S. I. et al. Global, regional, and national disability-adjusted life-years (DALYs) for 333 diseases and injuries and healthy life expectancy (HALE) for 195 countries and territories, 1990–2016: a systematic analysis for the Global Burden of Disease Study 2016. Lancet390, 1260–1344 (2017). PMC5605707 28919118
  2. [2]Gibson, G. J., Loddenkemper, R., Sibille, Y. & Lundback, B. The European Lung White Book: Respiratory Health and Disease in Europe. 2nd ed edn, (European Respiratory Society, 2013). 24000245
  3. [4]Gall ET Carter EM Matt Earnest C Stephens B Indoor air pollution in developing countries: research and implementation needs for improvements in global public health Am. J. Public Health 2013 103 e67 e72 10.2105/AJPH.2012.300955 23409891 PMC3673244 · DOI
  4. [5]Po JYT FitzGerald JM Carlsten C Respiratory disease associated with solid biomass fuel exposure in rural women and children: systematic review and meta-analysis Thorax 2011 66 232 239 10.1136/thx.2010.147884 21248322 · DOI · Paper page
  5. [6]Jary H Household air pollution and acute lower respiratory infections in adults: a systematic review PLoS ONE 2016 11 e0167656 10.1371/journal.pone.0167656 27907205 PMC5132292 · DOI
  6. [7]Misra P Srivastava R Krishnan A Sreenivaas V Pandav CS Indoor air pollution-related acute lower respiratory infections and low birthweight: a systematic review J. Trop. Pediatr. 2012 58 457 466 10.1093/tropej/fms017 22555386 · DOI
  7. [8]Jackson S Risk factors for severe acute lower respiratory infections in children—a systematic review and meta-analysis Croat. Med. J. 2013 54 110 121 10.3325/cmj.2013.54.110 23630139 PMC3641871 · DOI
  8. [9]Kurmi Om P Sadhra Charandeep S Ayres Jon G Sadhra Steven S Tuberculosis risk from exposure to solid fuel smoke: a systematic review and meta-analysis Journal of Epidemiology and Community Health 2014 68 12 1112 1118 10.1136/jech-2014-204120 25081627 · DOI
  9. [10]Lin HH Indoor air pollution from solid fuel and tuberculosis: a systematic review and meta-analysis Int. J. Tuberc. Lung. Dis. 2014 18 613 621 10.5588/ijtld.13.0765 24903801 · DOI · Paper page
  10. [11]Kurmi OP Semple S Simkhada P Smith WCS Ayres JG COPD and chronic bronchitis risk of indoor air pollution from solid fuel: a systematic review and meta-analysis Thorax 2010 65 221 228 10.1136/thx.2009.124644 20335290 · DOI
  11. [12]Gupta A Shah A Bronchial anthracofibrosis: an emerging pulmonary disease due to biomass fuel exposure [Review article] Int. J. Tuberc. Lung. Dis. 2011 15 602 612 10.5588/ijtld.10.0308 21418734 · DOI
  12. [13]Josyula, S. et al. Household air pollution and cancers other than lung: a meta-analysis. Environ. Health14, 24 (2015). PMC4377187 25890249
  13. [14]Kurmi OP Arya PH Lam KBH Sorahan T Ayres JG Lung cancer risk and solid fuel smoke exposure: a systematic review and meta-analysis European Respiratory Journal 2012 40 1228 1237 10.1183/09031936.00099511 22653775 · DOI
  14. [15]Bruce N Does household use of biomass fuel cause lung cancer? A systematic review and evaluation of the evidence for the GBD 2010 study Thorax 2015 70 433 441 10.1136/thoraxjnl-2014-206625 25758120 · DOI
  15. [16]Bruce, N. & Smith, K. R. WHO Indoor Air Quality Guidelines: Household Fuel Combustion–Review: Health effects of household air pollution (HAP) exposure. (2014). 25577935
  16. [17]Forouzanfar MH Global, regional, and national comparative risk assessment of 79 behavioural, environmental and occupational, and metabolic risks or clusters of risks, 1990–2015: a systematic analysis for the Global Burden of Disease Study 2015 Lancet 2016 388 1659 1724 10.1016/S0140-6736(16)31679-8 27733284 PMC5388856 · DOI · Paper page
  17. [20]Marc A Jeuland Subhrendu K Pattanayak Benefits and costs of improved cookstoves: assessing the implications of variability in health, forest and climate impacts PLoS ONE 2012 7 e30338 10.1371/journal.pone.0030338 22348005 PMC3278415 · DOI
  18. [21]Anenberg SC Cleaner cooking solutions to achieve health, climate, and economic cobenefits Environ. Sci. Technol. 2013 47 3944 3952 10.1021/es304942e 23551030 · DOI · Paper page
  19. [22]Bond TC Doherty SJ Fahey DW Boundin gthe role of black carbon in the climate system: a scientific assessment J. Geophys. Res. Atmos. 2013 118 5380 5552 10.1002/jgrd.50171 · DOI · Paper page
  20. [23]Jagger P Shively G Land use change, fuel use and respiratory health in Uganda Energy Policy 2014 67 713 726 10.1016/j.enpol.2013.11.068 24535892 PMC3925246 · DOI
  21. [24]Bailis R Drigo R Ghilardi A Masera O The carbon footprint of traditional woodfuels Nat. Clim. Chang. 2015 5 266 10.1038/nclimate2491 · DOI
  22. [25]Suzuki M Association of environmental tobacco smoking exposure with an increased risk of hospital admissions for pneumonia in children under 5 years of age in Vietnam Thorax 2009 64 484 489 10.1136/thx.2008.106385 19158124 · DOI · Paper page
  23. [26]Gegia M Tobacco smoking and tuberculosis treatment outcomes: a prospective cohort study in Georgia Bull. World Health Organ 2015 93 390 399 10.2471/BLT.14.147439 26240460 PMC4450709 · DOI
  24. [27]Capistrano SJ van Reyk D Chen H Oliver BG Evidence of biomass smoke exposure as a causative factor for the development of COPD Toxics 2017 5 5 6 10.3390/toxics5040036 PMC5750564 29194400 · DOI
  25. [28]Mukhopadhyay S Gujral M Abraham JL Scalzetti EM Iannuzzi MC A Case of Hut Lung Chest 2013 144 323 327 10.1378/chest.12-2085 23880681 · DOI
  26. [29]Silva R Oyarzun M Olloquequi J Pathogenic mechanisms in chronic obstructive pulmonary disease due to biomass smoke exposure Arch. Bronconeumol. 2015 51 285 292 10.1016/j.arbres.2014.10.005 25614376 · DOI
  27. [30]Stockfelt L Effects on airways of short-term exposure to two kinds of wood smoke in a chamber study of healthy humans Inhal. Toxicol. 2012 24 47 59 10.3109/08958378.2011.633281 22220980 · DOI
  28. [31]Donaldson K Tran CL Inflammation caused by particles and fibers Inhal. Toxicol. 2002 14 5 27 10.1080/089583701753338613 12122558 · DOI
  29. [32]Sood A ERS/ATS workshop report on respiratory health effects of household air pollution Eur. Respir. J. 2018 51 4 8 10.1183/13993003.00698-2017 PMC7418845 29301918 · DOI
  30. [33]Kirkby J Bountziouka V Lum S Wade A Stocks J Natural variability of lung function in young healthy school children Eur. Respir. J. 2016 48 411 419 10.1183/13993003.01795-2015 27076582 PMC4950968 · DOI
  31. [35]Lange P Lung-function trajectories leading to chronic obstructive pulmonary disease N. Engl. J. Med. 2015 373 111 122 10.1056/NEJMoa1411532 26154786 · DOI · Paper page
  32. [37]Grief SN Upper respiratory infections Prim. Care 2013 40 757 770 10.1016/j.pop.2013.06.004 23958368 PMC7127764 · DOI
  33. [39]Wonodi CB Evaluation of risk factors for severe pneumonia in children: the Pneumonia Etiology Research for Child Health study Clin. Infect. Dis. 2012 54 Suppl 2 S124 S131 10.1093/cid/cir1067 22403226 PMC3297552 · DOI
  34. [40]Taylor ET Nakai S Prevalence of Acute Respiratory Infections in Women and Children in Western Sierra Leone due to Smoke from Wood and Charcoal Stoves Int. J. Environ. Res. Public Health 2012 9 2252 2265 10.3390/ijerph9062252 22829802 PMC3397376 · DOI
  35. [41]Kilabuko JH Matsuki H Nakai S Air quality and acute respiratory illness in biomass fuel using homes in Bagamoyo, Tanzania Int. J. Environ. Res. Public Health 2007 4 39 44 10.3390/ijerph2007010007 17431314 PMC3719958 · DOI
  36. [42]Shrestha IL Shrestha SL Indoor air pollution from biomass fuels and respiratory health of the exposed population in Nepalese households Int. J. Occup. Environ. Health 2005 11 150 160 10.1179/oeh.2005.11.2.150 15875891 · DOI
  37. [44]Ramesh Bhat Y Manjunath N Sanjay D Dhanya Y Association of indoor air pollution with acute lower respiratory tract infections in children under 5 years of age Paediatr. Int. Child Health 2012 32 132 135 10.1179/2046905512Y.0000000027 22824659 · DOI
  38. [45]Patel AB Childhood illness in households using biomass fuels in India: secondary data analysis of nationally representative national family health surveys Int. J. Occup. Environ. Health 2013 19 35 42 10.1179/2049396712Y.0000000013 23582613 · DOI
  39. [46]Mortimer K A cleaner burning biomass-fuelled cookstove intervention to prevent pneumonia in children under 5 years old in rural Malawi (the Cooking and Pneumonia Study): a cluster randomised controlled trial Lancet 2017 2017 167 175 10.1016/S0140-6736(16)32507-7 PMC5783287 27939058 · DOI · Paper page
  40. [47]Smith KR Effect of reduction in household air pollution on childhood pneumonia in Guatemala (RESPIRE): a randomised controlled trial Lancet 2011 378 1717 1726 10.1016/S0140-6736(11)60921-5 22078686 · DOI · Paper page
  41. [48]Burnett RT An integrated risk function for estimating the global burden of disease attributable to ambient fine particulate matter exposure Environ. Health Perspect. 2014 122 397 403 10.1289/ehp.1307049 24518036 PMC3984213 · DOI · Paper page
  42. [49]Krzyzanowski M Cohen A Update of WHO air quality guidelines Air Quality, Atmosphere & Health 2008 1 7 13 10.1007/s11869-008-0008-9 · DOI
  43. [51]Davies PD Smoking and tuberculosis: the epidemiological association and immunopathogenesis Trans. R. Soc. Trop. Med. Hyg. 2006 100 291 298 10.1016/j.trstmh.2005.06.034 16325875 · DOI
  44. [52]Rabbani U Sahito A Nafees AA Kazi A Fatmi Z Pulmonary tuberculosis is associated with biomass fuel use among rural women in Pakistan: an age- and residence-matched case-control study Asia Pac. J. Public Health 2017 29 211 218 10.1177/1010539517696554 28434249 · DOI
  45. [53]Ramachandran RIPS Anish TS Nair S Lawrence T Rajasi RS Determinants of childhood tuberculosis - a case control study among children registered under revised national tuberculosis control programme in a district of South India Indian J. Tuberc. 2011 58 204 207 22533171
  46. [54]Jubulis J Modifiable risk factors associated with tuberculosis disease in children in Pune, India Int. J. Tuberc. Lung. Dis. 2014 18 198 204 10.5588/ijtld.13.0314 24429313 PMC4487622 · DOI
  47. [55]Jafta N Barregard L Jeena PM Naidoo RN Indoor air quality of low and middle income urban households in Durban, South Africa Environ. Res. 2017 156 47 56 10.1016/j.envres.2017.03.008 28319817 · DOI
  48. [56]Asher I Pearce N Global burden of asthma among children Int. J. Tuberc. Lung. Dis. 2014 18 1269 1278 10.5588/ijtld.14.0170 25299857 · DOI
  49. [57]Pearce N Pekkanen J Beasley R How much asthma is really attributable to atopy? Thorax 1999 54 268 10.1136/thx.54.3.268 10325905 PMC1745435 · DOI
  50. [58]Ellwood P The Global Asthma Network rationale and methods for Phase I global surveillance: prevalence, severity, management and risk factors Eur. Respir. J. 2017 49 1 2 10.1183/13993003.01605-2016 28077477 · DOI
  51. [59]Beasley R Semprini A Mitchell EA Risk factors for asthma: is prevention possible? Lancet 2015 386 1075 1085 10.1016/S0140-6736(15)00156-7 26382999 · DOI
  52. [60]Oluwole O Arinola GO Huo D Olopade CO Biomass fuel exposure and asthma symptoms among rural school children in Nigeria J. Asthma. 2017 54 347 356 10.1080/02770903.2016.1227334 27589676 · DOI
  53. [61]Oluwole O Arinola GO Huo D Olopade CO Household biomass fuel use, asthma symptoms severity, and asthma underdiagnosis in rural schoolchildren in Nigeria: a cross-sectional observational study BMC Pulm. Med. 2017 17 3 10.1186/s12890-016-0352-8 28056916 PMC5216579 · DOI
  54. [62]Kumar P Ram U Patterns, factors associated and morbidity burden of asthma in India PLoS ONE 2017 12 e0185938 10.1371/journal.pone.0185938 29073132 PMC5657621 · DOI
  55. [63]Gonzalez-Garcia M Caballero A Jaramillo C Maldonado D Torres-Duque CA Prevalence, risk factors and underdiagnosis of asthma and wheezing in adults 40 years and older: A population-based study J. Asthma. 2015 52 823 830 10.3109/02770903.2015.1010733 25996179 · DOI
  56. [64]Gaviola C Urbanisation but not biomass fuel smoke exposure is associated with asthma prevalence in four resource-limited settings Thorax 2016 71 154 160 10.1136/thoraxjnl-2015-207584 26699762 PMC5358795 · DOI
  57. [65]Angelis N Airway inflammation in chronic obstructive pulmonary disease J. Thorac. Dis. 2014 6 Suppl 1 S167 S172 24672691 PMC3966160
  58. [66]Amaral, A. F. S. Airflow Obstruction and Use of Solid Fuels for Cooking or Heating: BOLD Results. Am. J. Respir. Crit. Care. Med. 595–610 (2017). PMC6005234 28895752
  59. [67]Collaborators GCRD Global, regional, and national deaths, prevalence, disability-adjusted life years, and years lived with disability for chronic obstructive pulmonary disease and asthma, 1990–2015: a systematic analysis for the Global Burden of Disease Study 2015 Lancet Respir. Med. 2017 5 691 706 10.1016/S2213-2600(17)30293-X 28822787 PMC5573769 · DOI
  60. [69]Smith KR Millions Dead: How Do We Know and What Does It Mean? Methods Used in the Comparative Risk Assessment of Household Air Pollution Annu. Rev. Public Health 2014 35 185 206 10.1146/annurev-publhealth-032013-182356 24641558 · DOI · Paper page
  61. [70]Jaganath D Prevalence of chronic obstructive pulmonary disease and variation in risk factors across four geographically diverse resource-limited settings in Peru Respir. Res. 2015 16 40 10.1186/s12931-015-0198-2 25889777 PMC4389577 · DOI
  62. [71]Miele, C. H. et al. Urbanization and daily exposure to biomass fuel smoke both contribute to chronic bronchitis risk in a population with low prevalence of daily tobacco smoking. COPD, 1–10 (2015). PMC4955773 26552585
  63. [72]Siddharthan T Association between household air pollution exposure and chronic obstructive pulmonary disease outcomes in 13 low- and middle-income country settings Am. J. Respir. Crit. Care. Med. 2018 197 611 620 10.1164/rccm.201709-1861OC 29323928 PMC6005243 · DOI
  64. [73]Cullinan P Reid P Pneumoconiosis Prim. Care. Respir. J. 2013 22 249 252 10.4104/pcrj.2013.00055 23708110 PMC6442808 · DOI
  65. [74]Gupta B Johnson NW Kumar N Global epidemiology of head and neck cancers: a continuing challenge Oncology 2016 91 13 23 10.1159/000446117 27245686 · DOI
  66. [75]Kunal, S., Pilaniya, V. & Shah, A. Bronchial anthracofibrosis with interstitial lung disease: an association yet to be highlighted. BMJ. Case Rep.2016, pii: bcr2015213940 (2016). PMC4716430 26759407
  67. [76]Gupta A Shah A Bronchial anthracofibrosis: an emerging pulmonary disease due to biomass fuel exposure Int. J. Tuberc. Lung. Dis. 2011 15 602 612 10.5588/ijtld.10.0308 21418734 · DOI
  68. [77]Singh V Clinico-radiological profile and risk factors in patients with anthracosis Lung India 2015 32 102 106 10.4103/0970-2113.152614 25814792 PMC4372861 · DOI
  69. [78]Pilaniya V Kunal S Shah A Occurrence of bronchial anthracofibrosis in respiratory symptomatics with exposure to biomass fuel smoke Adv. Respir. Med. 2017 85 127 135 10.5603/ARM.2017.0022 28667653 · DOI
  70. [79]Sandoval J Pulmonary arterial hypertension and cor pulmonale associated with chronic domestic woodsmoke inhalation Chest 1993 103 12 20 10.1378/chest.103.1.12 8417864 · DOI
  71. [80]Ozbay B Uzun K Arslan H Zehir I Functional and radiological impairment in women highly exposed to indoor biomass fuels Respirology 2001 6 255 258 10.1046/j.1440-1843.2001.00339.x 11555385 · DOI
  72. [81]Bilal S Doss JG Cella D Rogers SN Quality of life associated factors in head and neck cancer patients in a developing country using the FACT-H&N J. Craniomaxillofac. Surg. 2015 43 274 280 10.1016/j.jcms.2014.11.024 25555894 · DOI
  73. [82]Fitzmaurice C The Global Burden of Cancer 2013 JAMA Oncol. 2015 1 505 527 10.1001/jamaoncol.2015.0735 26181261 PMC4500822 · DOI
  74. [83]Islami F Torre LA Jemal A Global trends of lung cancer mortality and smoking prevalence Transl. Lung Cancer Res. 2015 4 327 338 26380174 PMC4549470
  75. [84]McIntyre A Ganti AK Lung cancer-A global perspective J. Surg. Oncol. 2017 115 550 554 10.1002/jso.24532 28418583 · DOI
  76. [85]Hill AB The environment and disease: association or causation? Proc. R. Soc. Med. 1965 58 295 300 14283879 PMC1898525
  77. [86]Tammemagi MC Selection criteria for lung-cancer screening N. Engl. J. Med. 2013 368 728 736 10.1056/NEJMoa1211776 23425165 PMC3929969 · DOI
  78. [87]Fandiño-Del-Rio M Effects of a liquefied petroleum gas stove intervention on pollutant exposure and adult cardiopulmonary outcomes (CHAP): study protocol for a randomized controlled trial Trials 2017 18 518 10.1186/s13063-017-2179-x 29100550 PMC5670728 · DOI
  79. [89]Mehra D Geraghty PM Hardigan AA Foronjy R A comparison of the inflammatory and proteolytic effects of dung biomass and cigarette smoke exposure in the lung PLoS ONE 2012 7 e52889 10.1371/journal.pone.0052889 23285217 PMC3527613 · DOI
  80. [91]Howick J Glasziou P Aronson JK The evolution of evidence hierarchies: what can Bradford Hill’s ‘guidelines for causation’ contribute? J. R. Soc. Med. 2009 102 186 194 10.1258/jrsm.2009.090020 19417051 PMC2677430 · DOI
  81. [92]Household use of solid fuels and high-temperature frying. IARC Monogr. Eval. Carcinog. Risks Hum. 2010 95 1 430 20701241 PMC5046077

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Authors
Simkovich, S. M., Goodman, D., Roa, C., Crocker, M. E., Gianella, G. E., Kirenga, B. J., Wise, R. A., & Checkley, W.
Affiliations
  • Johns Hopkins University (US)
  • Seattle Children's Hospital (US)
  • Universidad Peruana Cayetano Heredia (PE)
  • Mulago Hospital (UG)
Corresponding author
Checkley, William
Venue
npj Primary Care Respiratory Medicine
Published
2019-04-26
Volume
29
Issue
1
Pages
12-12
ISSN
2055-1010 (ISSN-L)
OpenAlex
W2940737659
Cited by
139
References
3
Citations by year
2026: 18 · 2025: 16 · 2024: 25 · 2023: 19 · 2022: 23 · 2021: 24 · 2020: 10 · 2019: 4
FWCI
0.64
Type
journal article
Language
en
Open access
Locations
  • npj Primary Care Respiratory Medicine (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • Greater South Information System
Funders
  • Tulane University
  • Johns Hopkins University
  • Morehouse School of Medicine
  • National Institutes of Health
  • School of Medicine, Johns Hopkins University
  • National Heart, Lung, and Blood Institute (UM1HL134590)
  • Fogarty International Center (R25TW009340)
Topics
  • Physical Sciences › Environmental Science › Pollution › Energy and Environment Impacts
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Air Quality and Health Impacts
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Indoor Air Quality and Microbial Exposure
Keywords
household air pollution, biomass combustion, respiratory diseases, acute respiratory infections, tuberculosis, asthma, chronic obstructive pulmonary disease, pneumoconiosis, head and neck cancer, lung cancer, tobacco smoke exposure, outdoor air pollution, environmental exposure monitoring, low- and middle-income countries
MeSH terms
Family Characteristics, Humans, Respiratory Tract Diseases, Risk Factors, Tobacco Smoke Pollution, Air Pollution, Indoor, Inhalation Exposure

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