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Difference in days ≥30 minutes of moderate-to-vigorous intensity physical activity (MVPA) between the single item measure (SIM) and accelerometry: (A) total MVPA (MVPA-total) and (B) MVPA occurring in bouts (MVPA-bouts). Median difference and inter-quartile range for the ordinal distributions are presented as dotted horizontal lines against the median of the two measures (single-item and accelerometer).
