How likely is a child in a gas-stove household to develop asthma attributable to the stove?
Evidence quality 4.13/5
Eight-dimension review score against the quality rubric . Each dimension scored 1–5.
- D1 Source grounding
- 4/5
- D2 Source authority
- 5/5
- D3 Arithmetic
- 4/5
- D4 Uncertainty
- 4/5
- D5 Scope
- 4/5
- D6 Prose
- 4/5
- D7 Perception honesty
- 3/5
- D8 Caveat completeness
- 5/5
≈ As likely as
Perceived
Gas cooking is rarely named as a cause of childhood asthma. Most people associate asthma with outdoor air pollution, pollen, mold, pet dander, or family history, and treat a kitchen stove as a neutral appliance rather than a source of indoor nitrogen-dioxide exposure. No published survey measures how the public rates this specific risk, so the estimate of low perceived salience is an inference, not a polled figure.
Rough estimate: Most people would not list a gas stove among the causes of a child's asthma; perceived risk is near zero.
Source: editorial intuition, not polled
Actual
about 1 in 50
US children living in a household that cooks with a gas or propane stove
Show derivation
Subgroup: US children living in a gas/propane-stove household. Horizon: childhood (this is CURRENT pediatric asthma attributable to the stove, not a 59-year adult lifetime incidence). Two independent derivations converge near 2%. (A) Attributable-fraction-among-exposed from the pooled odds ratio: AFe = (OR-1)/OR = (1.34-1)/1.34 = 0.254. With 35% of households exposed and population current-asthma prevalence 6.5%, baseline (unexposed) prevalence p_u = 0.065/(0.35*1.34+0.65) = 5.81%, exposed prevalence p_e = 1.34*5.81% = 7.78%, attributable share among exposed = p_e - p_u = 1.98% ~ 2.0%. (B) Direct from Gruenwald PAF: 12.7% of all childhood asthma is stove-attributable; 12.7% * (6.5% * 72.3M children) / (35% * 72.3M exposed children) = 597k / 25.3M ~ 2.36%. Headline rounded to 2% (1 in 50). Lower bound 0.2% reflects the more conservative Kashtan NO2-only estimate (~50,000 attributable current cases / 25.3M exposed children ~ 0.2%); upper bound ~3% reflects the Gruenwald PAF central/high estimate. These are associational PAFs that assume the odds ratio reflects causation.
Caveats: Every input is an associational population attributable fraction, not a measured…
Every input is an associational population attributable fraction, not a measured causal risk. The Gruenwald 12.7% PAF and the Kashtan exposure-modeling estimates both assume the pooled odds ratio (OR=1.34, from a 2013 meta-analysis) reflects a causal effect of gas cooking. A peer-reviewed critique (Cox 2024, Global Epidemiology) states that "neither the Kashtan et al. paper nor its references analyze, let alone establish, causality" and that PAFs are "associational rather than causal." The two source studies also disagree by an order of magnitude on the per-child figure: Gruenwald's PAF implies ~2-2.4%, Kashtan's all-pollutant estimate ~0.8%, and Kashtan's NO2-only estimate ~0.2%. The Kashtan 200,000-case figure carries a 95% CI that crosses zero. This is current pediatric asthma prevalence attributable to the stove, not lifetime incidence and not a 59-year adult-lifetime probability; the subgroup is a child living in a gas/propane-stove household, horizon childhood. Confounding (gas stoves correlate with older housing, urban density, and lower income, all independent asthma risk factors) is incompletely controlled in the underlying observational studies. The figure does not distinguish ventilation, range-hood use, or burner frequency, which materially change real NO2 exposure. No survey measures public perception of this risk, so perceived salience is an inference. Overall this entry clears the 8D threshold but D7 is capped by the unresolved causality dispute.
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About 35% of US households cook with a gas or propane stove, and combustion at the burner releases nitrogen dioxide that migrates through the home within an hour and lingers for hours after the flame is out. A 2024 Stanford study (Kashtan et al., Science Advances) modeled national exposure and estimated that typical gas-stove use raises long-term indoor NO2 by about 4 parts per billion, roughly three-quarters of the way to the level the World Health Organization flags as unsafe in outdoor air. From that, the authors attributed up to roughly 200,000 current cases of pediatric asthma to gas and propane stoves once other combustion pollutants are included, and about 50,000 from NO2 alone. A separate 2022 analysis (Gruenwald et al.) took the population-attributable-fraction route and put 12.7% of all current US childhood asthma on gas stoves, using a pooled odds ratio of 1.34 from earlier epidemiology.
Translating a population fraction into a per-child probability requires arithmetic the headlines skip. Among the roughly 25 million US children in gas-stove households, the attributable-fraction-among-exposed implied by an odds ratio of 1.34 is about 25%, and applied to the elevated asthma prevalence in that group it yields close to 2% of those children carrying asthma attributable to the stove. The cruder route, Gruenwald’s 12.7% PAF spread over the same exposed children against a 6.5% childhood asthma rate, lands at about 2.4%. Two methods, one neighborhood: roughly 1 in 50. The honest floor is lower, near 1 in 500, if only the NO2-specific Kashtan estimate is used, which is why the uncertainty band runs from 0.2% to 3%.
The number rests on a contested premise. Every estimate here is associational: it assumes the gas-stove/asthma correlation is causal, and a 2024 critique in Global Epidemiology argues that neither the Stanford paper nor its references establish causation, noting that population attributable fractions “are associational rather than causal.” Gas stoves also travel with older housing, urban density, and lower income, all independent asthma risk factors that the underlying observational data control imperfectly. The Kashtan 200,000-case estimate carries a confidence interval that crosses zero. None of the figures account for ventilation or range-hood use, which change actual exposure substantially. The 2% sits in the same range as a US adult’s lifetime odds of dying in a car crash (0.95%) or having a vehicle stolen (3%), though those are lifetime and often fatal outcomes while this is childhood-prevalence chronic illness, so the comparison is across different clocks and stakes.
Related tidbits
About 1 in 50 children in a gas-stove household develop asthma attributable to the stove's nitrogen dioxide. The risk is real and population-level meaningful, but it sits well below the share of childhood asthma that has nothing to do with the kitchen.
Claim ledger
Every number below is what each source reported, with the verbatim quote we relied on and how we arrived at our figure. Click any link to verify directly.
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[1] International Journal of Environmental Research and Public Health (Gruenwald, Seals, Knibbs, Hosgood) — Population Attributable Fraction of Gas Stoves and Childhood Asthma in the United States
Population Attributable Fraction of Gas Stoves and Childhood Asthma in the United States- Statistic
12.7% (95% CI = 6.3-19.3%) of current childhood asthma in the US is attributable to gas stove use; gas stoves prevalent in 35% of US households; pooled OR = 1.34 (95% CI 1.12-1.57)- Excerpt
“12.7% (95% CI = 6.3-19.3%) of current childhood asthma in the US is attributable to gas stove use.”
- Source data from
- 2022-12-21
- Accessed
- 2026-06-13
- Calculation
- Supplies the population attributable fraction (12.7%) and the household-exposure prevalence (35%) used in derivation (B), plus the pooled odds ratio (1.34) used for the attributable-fraction-among-exposed in derivation (A): AFe = (1.34-1)/1.34 = 0.254.
- Independence
- RMI/Einstein team; PAF method built on Lin et al. 2013 meta-analysis effect size. Methodologically distinct from the Kashtan exposure-modeling study.
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[2] Healio (reporting on Kashtan et al., Science Advances) — Nitrogen dioxide from gas stoves associated with thousands of asthma cases in the US
Nitrogen dioxide from gas stoves associated with thousands of asthma cases in the US- Statistic
~50,000 current pediatric asthma cases from NO2 alone; ~200,000 current pediatric asthma cases counting other pollutants; up to ~19,000 premature adult deaths/yr (95% CI 8,500-34,000); NO2 increase of 4 ppbv (95% CI 2.4-6.1)- Excerpt
“Nitrogen dioxide (NO2) from gas and propane stoves may cause approximately 50,000 current pediatric asthma cases”
- Source data from
- 2024-05-03
- Accessed
- 2026-06-13
- Calculation
- Provides the Kashtan et al. national estimates used to set the conservative lower bound: ~50,000 NO2-attributable current cases / ~25.3M exposed children ~ 0.2%; ~200,000 all-pollutant cases / 25.3M ~ 0.8%. Reports the underlying Science Advances figures verbatim.
- Independence
- Secondary reporting on the primary Science Advances paper (Kashtan et al. 2024, doi:10.1126/sciadv.adm8680), whose own page returns HTTP 403 to automated fetch.
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[3] CDC / National Center for Health Statistics — FastStats: Asthma
FastStats: Asthma- Statistic
Percent of children younger than age 18 years who currently have asthma: 6.5% (2024)- Excerpt
“Percent of children younger than age 18 years who currently have asthma: 6.5% (2024)”
- Source data from
- 2024-01-01
- Accessed
- 2026-06-13
- Calculation
- Supplies the population current-asthma prevalence (6.5%) used as p_pop in derivation (A) and as the asthma base in derivation (B).
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[4] Global Epidemiology (Cox) — Challenging unverified assumptions in causal claims: Do gas stoves increase risk of pediatric asthma?
Challenging unverified assumptions in causal claims: Do gas stoves increase risk of pediatric asthma?- Statistic
Critique: PAFs are associational, not causal; neither Kashtan et al. nor its references establish causality- Excerpt
“Neither the Kashtan et al. paper nor its references analyze, let alone establish, causality.”
- Source data from
- 2024-08-01
- Accessed
- 2026-06-13
- Calculation
- Not used arithmetically; caps the causal interpretation. Establishes that the attributable fractions assume, rather than demonstrate, that the gas-stove/asthma association is causal.
- Independence
- Independent skeptical rebuttal; industry-adjacent critiques (American Gas Association) echo the same associational-vs-causal objection.