Table 8.

High-level summary of findings by health indicator

Health indicator	Number of studies	Quality of evidence	Summary of findings: Number of studies reporting unfavourable/null/favourable associations with at least one health indicator measure by SB typea
Critical
Adiposity	60	Very low to moderate	Objectively measured sedentary time:
			Sedentary time in 30-min bouts (accelerometer-derived): null (1)
			Total sedentary time (accelerometer-derived): unfavourable (1), null (12)
			Screen-based sedentary behaviours:
			Computer (duration, frequency): unfavourable (1), null (6)
			Internet (duration): null (1)
			Total screen time (duration): unfavourable (9), null (14)
			TV time (duration): unfavourable (20), null (24), favourable (2)
			Video games (duration): unfavourable (1)
			Other screens (DVDs/videos; duration): unfavourable (1), null (1)
			Other sedentary behaviours:
			Reading (duration): null (1)
			Sitting (baby seats, car, sedentary quiet play; duration): unfavourable (2), null (4), favourable (1)
Motor development	7	Very low	Objectively measured sedentary time:
			Sedentary time in 30-min bouts (accelerometer-derived): null (1)
			Total sedentary time (accelerometer-derived): unfavourable (1), null (2)
			Screen-based sedentary behaviours:
			TV time (duration): unfavourable (2), null (3)
			Other sedentary behaviours:
			Sitting (baby carrier/sling, car seat, high chair/other chair, playpen, stroller; duration): null (1), favourable (1)
			Supine position (duration): unfavourable (1), null (1)
Psychosocial health	15	Very low to moderate	Objectively measured sedentary time:
			Total sedentary time (accelerometer-derived): null (1)
			Screen-based sedentary behaviours:
			Computer (duration): unfavourable (1), null (1)
			Total screen time (duration): unfavourable (1)
			TV time (duration): unfavourable (9), null (11), favourable (2)
Cognitive development	25	Very low	Objectively measured sedentary time:
			Total sedentary time (accelerometer-derived): null (1)
			Screen-based sedentary behaviours:
			Computer (yes, no): null (1)
			Mobile phone use (yes, no): unfavourable (1)
			Total screen time (duration): unfavourable (1)
			TV time (duration): unfavourable (11), null (10), favourable (1)
			Video games (duration): null (1)
			Other screens (total or electronic media exposure; duration): unfavourable (2), null (1)
			Other sedentary behaviours:
			Reading (duration, frequency): null (2), favourable (3)
			Storytelling with parents (frequency): null (2), favourable (2)
Important
Bone and skeletal health	1	Very low	Screen-based sedentary behaviours:
			Screen time (duration): null (1)
			Objectively measured sedentary time:
			Total sedentary time (accelerometer-derived): null (1)
Cardiometabolic health	1	Very low	Screen-based sedentary behaviours:
			TV time (duration): null (1)
Fitness	2	Very low	Screen-based sedentary behaviours:
			TV time (duration): unfavourable (2)
Risks / harms	0	N/A	N/A

^aNote that the number of studies reporting unfavourable/null/favourable associations does not sum to the total number of studies for a given indicator since some studies reported mixed associations. N/A: not applicable