Differences in Arterial Blood Gas Testing by Race and Sex across 161 U.S. Hospitals in Four Electronic Health Record Databases
Authors' conclusion
Asian, Black, and female patients had significantly reduced and delayed rates of ABG testing.
Study context
- Population
- Critically ill ICU patients in 161 US hospitals (Duke, MIMIC-III, MIMIC-IV, eICU), 2001–2019
- Participants
- 184,178 ICU admissions
- Exposure
- Arterial blood gas (ABG) testing by race and sex
- Outcome
- ABG testing
Methodological detailselectronic health record databases, adjusted for confounders
- Electronic health record databases
- Adjusted for confounders
Main finding
As reported in the abstract
Estimate (95% CI)P value
Asian vs White
OR(ABG test) 0.807 (0.741–0.879)
Black vs White
OR(ABG test) 0.859 (0.830–0.888)
Hispanic or Latino vs White
OR(ABG test) 0.919 (0.865–0.976)
Asian vs White
HR(time to first ABG) 0.855 (0.803–0.911)
P < 0.001Black vs White
HR(time to first ABG) 0.833 (0.814–0.853)
P < 0.001Asian vs White
IRR(repeated ABG) 0.913 (0.845–0.986)
Black vs White
IRR(repeated ABG) 0.913 (0.887–0.940)
Female vs Male
OR(ABG test) 0.926 (0.905–0.948)
Female vs Male
HR(time to first ABG) 0.958 (0.942–0.974)
Female vs Male
IRR(repeated ABG) 0.951 (0.931–0.971)
- ICU admissions with ABG test results
- 35.0%
Observational data: associations, not effects.
Further findings
Mechanically ventilated patients with arterial lines (subgroup)
- Findings consistent
Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.
Original publication
Differences in Arterial Blood Gas Testing by Race and Sex across 161 U.S. Hospitals in Four Electronic Health Record Databases. Am J Respir Crit Care Med. Published 1 June 2025. doi:10.
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