Cross-sectional and prospective associations between children's 24-h time use and their health-related quality of life: a compositional isotemporal substitution approach.

Prospectively, inactivity was associated with lower overall HRQoL (β = −10.00 [−19.13, −0.87]), relationship with friends (β = −16.41 [−31.60, −1.23]) and school functioning (β = −15.30 [−29.16, −1.44]) scores, while sleep showed a positive trend with overall HRQoL (β = 10.76 [−1.09, 22.61]) and school functioning (β = 17.12 [−0.87, 35.10]) scores.

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