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The recall diary for physical activity was compared with accelerometry data after the four month follow-up in a subset of participants (n=99).
Any self-report measure will be subject to issues of recall bias, but it should also be noted that questionnaires may capture different aspects of physical activity compared with accelerometry.
Similar(58)
PAQs are commonly compared with objective measures of PA from accelerometry to determine whether their outputs reflect similar parameters [ 14, 15].
Included in this research agenda is population-level physical activity monitoring in the countries listed in Additional file 2 where data was unavailable or unknown for the period 2000-2010, as well as the need for sub-samples to be compared with objective physical activity measures, using accelerometry or pedometers at the population level [ 70- 72].
The predicted mTBI risk was compared with concussions sustained and recorded in football with helmet-mounted accelerometry systems and those reconstructed with crash test dummies.
But compared with what?
Compared with what?
compared with other magazines'.
as compared with control fish.
More conservative improvements were seen with accelerometry (Table 2), but results still showed an increase of 70 min of activity a week (p = .007), and 52% of patients met the recommended levels at follow-up compared with 13% at baseline.
The reliability (repeatability) was reasonable with 67%% agreement at 12 months, but the validity was poor, with 19%% sensitivity and 85%% specificity compared to accelerometry.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com