| Summary: | The cold response of the digital arteries in a cohort of vibration-exposed workers was related to measures of daily vibration exposure expressed in terms of r.m.s. acceleration magnitude normalised to an 8-hour day, and frequency was weighted according to either the frequency weighting <i>W</i><sub>h</sub> defined in ISO 5349-1:2001 (<i>A</i><sub>h</sub>(8) in ms<sup>−2</sup> r.m.s) or the hand–arm vascular frequency weighting <i>W</i><sub>p</sub> proposed in the ISO Technical Report 18570:2017 (<i>A</i><sub>p</sub>(8) in ms<sup>−2</sup> r.m.s.). The metric <i>A</i><sub>p</sub>(8), which assigns more weight to intermediate- and high-frequency vibrations (31.5–250 Hz), performed better for the prediction of cold-induced digital arterial hyperresponsiveness in the vibration-exposed workers than the measure <i>A</i><sub>h</sub>(8) derived from the conventional ISO frequency weighting, which gives more importance to lower-frequency vibrations (≤16 Hz).
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