Is CO2 an Indoor Pollutant? Direct Effects of Low-to-Moderate CO2 Concentrations on Human Decision-Making Performance.
BACKGROUND: Associations of higher indoor carbon dioxide (CO[sub 2]) concentrations with impaired work performance, increased health symptoms, and poorer perceived air quality have been attributed to correlation of indoor CO[sub 2] with concentrations of other indoor air pollutants that are also inf...
| Publicado en: | Environmental Health Perspectives Vol. 120; no. 12; pp. 1671 - 1678 |
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| Autores principales: | , , , , , , |
| Formato: | research tables/charts Journal Article |
| Publicado: |
National Institute of Environmental Health Sciences
Dec2012
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=104403972&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 104403972 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00916765 3B5 jtl: Environmental Health Perspectives issn: 00916765 maglogo: N pubinfo: dt: Dec2012 vid: 120 iid: 12 pid: 56539 pub: National Institute of Environmental Health Sciences place: Research Triangle Park, North Carolina artinfo: ui: 104403972 84495991 10.1289/ehp.1104789 104403972 ppf: 1671 ppct: 7 formats: fmt: @attributes: type: P tig: atl: Is CO2 an Indoor Pollutant? Direct Effects of Low-to-Moderate CO2 Concentrations on Human Decision-Making Performance. aug: au: Satish, Usha Mendel, Mark J. Shekhar, Krishnamurthy Hotchi, Toshifumi Sullivan, Douglas Streufert, Siegfried Fisk, William J. affil: Department of Psychiatry and Behavioral Science, Upstate Medical University, State University of New York, Syracuse, New York, USA sug: subj: Decision Making Carbon Dioxide Adverse Effects Air Pollution, Indoor Adverse Effects Risk Assessment Human Experimental Studies Task Performance and Analysis Data Analysis Software Analysis of Variance Post Hoc Analysis Descriptive Statistics Male Female Adult Matched-Pair Analysis Funding Source Adult: 19-44 years Male Female ab: BACKGROUND: Associations of higher indoor carbon dioxide (CO[sub 2]) concentrations with impaired work performance, increased health symptoms, and poorer perceived air quality have been attributed to correlation of indoor CO[sub 2] with concentrations of other indoor air pollutants that are also influenced by rates of outdoor-air ventilation. OBJECTIVES: We assessed direct effects of increased CO[sub 2], within the range of indoor concentrations, on decision making. METHODS: Twenty-two participants were exposed to CO[sub 2] at 600, 1,000, and 2,500 ppm in an office-like chamber, in six groups. Each group was exposed to these conditions in three 2.5-hr sessions, all on 1 day, with exposure order balanced across groups. At 600 ppm, CO[sub 2] came from outdoor air and participants' respiration. Higher concentrations were achieved by injecting ultrapure CO[sub 2]. Ventilation rate and temperature were constant. Under each condition, participants completed a computer-based test of decision-making performance as well as questionnaires on health symptoms and perceived air quality. Participants and the person administering the decision-making test were blinded to CO[sub 2] level. Data were analyzed with analysis of variance models. RESULTS: Relative to 600 ppm, at 1,000 ppm CO[sub 2], moderate and statistically significant decrements occurred in six of nine scales of decision-making performance. At 2,500 ppm, large and statistically significant reductions occurred in seven scales of decision-making performance (raw score ratios, 0.06 -- 0.56), but performance on the focused activity scale increased. CONCLUSIONS: Direct adverse effects of CO[sub 2] on human performance may be economically important and may limit energy-saving reductions in outdoor air ventilation per person in buildings. Confirmation of these findings is needed. pubtype: Academic Journal doctype: research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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