However, we observed an overall trend for positive and negative associations for BAD and FMD, respectively, during the 24-hr period.
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Exploration of the rapid effects of personal fine particulate matter exposure on arterial hemodynamics and vascular function during the same day.
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The sentences
It is possible that having more observations would have provided additional power and that many of the borderline non-significant time points in the BAD and FMD trends would have become statistically significant.