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Review of EPA's 2022 Draft Formaldehyde Assessment (2023) / Chapter Skim
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Appendix D: Point of Departure Analysis Using Two Studies: A Case Study
Pages 142-147

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From page 142...
... (1984) used logistic regression analysis to estimate potential symptom risk ratio dependency upon respondents' age, smoking status, gender, and the formaldehyde concentration measured in the home.
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From page 143...
... * Limit of detection FIGURE D-1 Plots of prevalence odds by formaldehyde concentration using EPA's choice (Hanrahan study, blue solid line)
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From page 144...
... To do that, we assumed that the distribution of the weekly average indoor formaldehyde concentrations in the mobile homes approximates the distribution of the time-weighted individual exposures in the Liu et al.
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From page 145...
... The curve representing the polynomial plot is shown by the broken red line in Figure D-1. The mathematical function is shown in Equation 2 below, where 𝑥 represents formaldehyde concentration.
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From page 146...
... Molecular mass = 30.03 g/mol, molar volume = 24.45 L, and temperature = 25 ℃. BMC = benchmark concentration; EPA = US Environmental Protection Agency.
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From page 147...
... 1986. Formaldehyde concentrations inside private resi dences: A mail-out approach to indoor air monitoring.
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Key Terms

  • indoor concentrations
  • prevalence odds
  • formaldehyde concentration
  • weekly average
  • published data

  • exposure categories
  • formaldehyde assessment
  • formaldehyde concentrations
  • polynomial function
  • mobile homes

  • background prevalence
  • draft formaldehyde
  • regression analysis
  • values estimated
  • logistic regression

  • formaldehyde exposure
  • function using
  • benchmark concentration
  • indoor formaldehyde
  • average indoor

  • combining data
  • average hcho
  • mathematical function
  • reference concentrations
  • histograms alongside

  • corresponding prevalence
  • irritant effects
  • exposure bins
  • concentrations inside
  • potential symptom


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