Comparison 1. Intervention for reducing sedentary behaviour versus control: main outcomes.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1.1 Sedentary time [min/day]	7	397	Mean Difference (IV, Random, 95% CI)	‐44.91 [‐93.13, 3.32]
1.1.1 Self‐reported	2	139	Mean Difference (IV, Random, 95% CI)	‐84.29 [‐270.14, 101.56]
1.1.2 Objectively measured	5	258	Mean Difference (IV, Random, 95% CI)	‐30.45 [‐72.68, 11.77]
1.2 Sedentary time [min/day] per intervention duration	7	397	Mean Difference (IV, Random, 95% CI)	‐44.91 [‐93.13, 3.32]
1.2.1 Single point of contact	3	219	Mean Difference (IV, Random, 95% CI)	‐79.34 [‐179.31, 20.62]
1.2.2 Longitudinal interventions	4	178	Mean Difference (IV, Random, 95% CI)	‐20.34 [‐67.25, 26.56]
1.12 Sedentary time in specific domains [min/day]	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.1 TV time	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.2 Computer time	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.3 Reading	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.4 Socialising	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.5 Transportation	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.6 Hobbies	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.7 Paperwork	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.8 Eating	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.12.9 Other	1		Mean Difference (IV, Random, 95% CI)	Totals not selected
1.13 Breaks in sedentary behaviour	1	60	Mean Difference (IV, Random, 95% CI)	‐8.00 [‐16.78, 0.78]