Oxygen saturation, measured by pulse oximetry (SpO2), is a vital clinical measure. Our descriptive, cross-sectional study describes SpO2 measurements from 6289 healthy subjects from age 1 to 80 years at 15 locations from sea level up to the highest permanent human habitation. Oxygen saturation measurements are illustrated as percentiles. As altitude increased, SpO2 decreased, especially at altitudes above 2500 m. The increase in altitude had a significant impact on SpO2 measurements for all age groups. Our data provide a reference range for expected SpO2 measurements in people from 1 to 80 years from sea level to the highest city in the world.
- Clinical Epidemiology
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Contributors All authors were involved in the design of the study and collection of clinical data. JAD, JRC and CRM performed the data analysis. JRC, CRM, DC, JAD, MP, VYL and RS drafted the final manuscript and all authors reviewed and made amendments.
Competing interests None declared.
Patient consent Obtained.
Ethics approval Ethics Committee at Hospital Nacional Docente Madre Niño San Bartolomé, Lima-Peru.
Provenance and peer review Not commissioned; externally peer reviewed.
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