First author (reference)	Intervention length, weeks	Sample size	Mean difference in weight change, kg (95% CI)
Baetge (28)	<13	49	–4.16 (–15.29 to 6.97)
Cleo(27)	<13	50	–2.90 (–4.67 to –1.13)
Collins (30)	<13	210	–3.34 (–4.23 to –2.45)
Hepdurgun (24)	<13	101	–1.54 (–2.27 to –0.81)
Morgan (29)	<13	105	–3.90 (–5.21 to –2.59)
Morgan (31)	<13	110	–3.70 (–5.09 to –2.31)
Padwal (25)	13–26	426	–0.80 (–2.32 to 0.72)
Arterburn (34)	13–26	133	–4.80 (–6.37 to –3.23)
Carnie (35)	13–26	199	–0.70 (–1.78 to 0.38)
Crane (32)	13–26	107	–4.60 (–12.17 to 2.97)
Hardcastle (33)	13–26	334	–0.75 (–5.89 to 4.39)
Jane (36)	13–26	91	–4.80 (–14.20 to 4.60)
Mayer (26)	13–26	402	–0.70 (–6.20 to 4.80)
Yardley (37)	13–26	90	–2.24 (–4.83 to 0.35)