Accuracy of wearable smartwatch for measuring blood pressure and oxygen saturation across a wide altitudinal gradient: a comparative study in Migrant and Resident populations.

Front Physiol · 2026 · PMC12907194 · PMID 41704819

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did not reach statistical significanceP = 0.080so close (0.05 < p ≤ 0.1)

However, a trend towards a more negative bias in DBP error was observed with increasing altitude, although this did not reach statistical significance (P = 0.080; Figure 4C ).

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