The association between reallocations of time and health using compositional data analysis: a systematic scoping review with an interactive data exploration interface

Table 2 Health outcomes associated with reallocations of time between sleep, SB, LPA and MVPA from longitudinal studies

Reallocation		Adiposity			Biomarkers			Mental health			Cognitive health			Chronic disease			Mortality
From	To	↑	↔	↓	↑	↔	↓	↑	↔	↓	↑	↔	↓	↑	↔	↓	↑	↔	↓
	LPA	0	1	0	0	0	0	0	4	0	0	0	0	0	1	0	1	0	0
Sleep	MVPA	0	1	0	0	0	0	1	3	1	0	0	0	1	0	0	1	0	0
	SB	0	1	0	0	0	0	1	3	0	0	0	0	0	0	1	0	1	0
	LPA	2	10	0	2	3	0	1	4	1	0	3	0	1	0	0	1	0	0
SB	MVPA	3	6	0	0	5	0	3	3	0	0	3	0	1	0	0	1	0	0
	Sleep	0	1	0	0	0	0	2	3	1	0	0	0	1	0	0	0	1	0
	MVPA	1	5	0	0	5	0	1	3	0	0	3	0	1	0	0	1	0	0
LPA	SB	0	4	2	0	3	2	0	4	0	0	0	0	0	0	1	0	1	1
	Sleep	0	1	0	0	0	0	0	4	0	0	0	0	0	1	0	0	0	1
	LPA	0	3	2	0	5	0	0	3	1	0	0	0	0	0	1	0	0	1
MVPA	SB	0	2	3	0	5	0	0	3	1	0	0	0	0	0	1	0	0	2
	Sleep	0	0	0	0	0	0	1	3	1	0	0	0	0	0	1	0	0	1

↑, number of reallocations that were favourable for health; ↔, number of reallocations that were not significantly related to health; ↓, number of reallocations that were unfavourable for health. For example, in the first row of the first cell, when considering the association between reallocating time from sleep to LPA and adiposity, 0 studies reported a significant, favourable association; 1 study reported no significant association; 0 studies reported a significant, unfavourable association. Only studies presenting CIs or significance levels were included in the summary. Numbers for corresponding reallocations do not necessarily match due to some studies only reporting outcomes for some reallocations. (n = 12 studies contributed to grading)
Abbreviations: SB, sedentary behaviour; LPA, light physical activity; MVPA, moderate-to-vigorous physical activity; CIs, confidence intervals

ISSN: 1479-5868