2. Interventions aimed at rationing and/or prioritising demand: reanalysed ITS studies.

Study	Outcome	Postintervention period	Secular trend (SE, P)	Change in level (SE, P)	Change in slope (SE, P)
Lowthian 2011	Number of participants waiting longer than recommended time threshold ("urgent" participants waiting less than 30 days) every month	3 years	+0.25 (SE 0.41, P value 0.55)	‐5.40 (SE 6.44, P value 0.41)	‐1.03 (SE 0.51, P value 0.049)
	Number of participants waiting longer than recommended time threshold ("semi‐urgent" patients waiting less than 90 days) every month		+13.72 (SE 6.23, P value 0.032)	+32.55 (SE 54.65, P value 0.55)	‐27.99 (SE 8.58, P value 0.002)
	Number of participants waiting longer than recommended time threshold ("non‐urgent" participants waiting less than 365 days) every month		‐0.15 (SE 1.85, P value 0.94)	+5.50 (SE 11.83, P value 0.64)	‐1.62 (SE 2.96, P value 0.59)