TABLE 2.

Overall changes in purchase stratified by drug and intervention groups, March- September 2019.

City	Drug	Expected	Model-fitted actual	Absolute change			Relative change (%)			p-value
				Estimate	95% CI		Estimate	95% CI
Piot cities
	Selected	1,920	4,457	2,536	2,300	2,759	132.9	107.1	160.9	<0.001
	Originator	6,205	3,748	−2,457	−2,941	-1990	−39.5	−44.4	−34.3	<0.001
	Alternative	5,058	5,527	470	74	857	9.4	1.4	18.0	0.021
	Other	4,154	1,004	−3,150	−4,005	-2,424	−75.6	−80.6	−69.8	<0.001
	Non-selected	15,324	10,291	−5,033	−6,531	-3,607	−32.7	−39.1	−25.7	<0.001
	All	17,278	14,747	−2,531	−4,242	−949	−14.5	−22.5	−6.0	0.002
	All (spending)	80,827	52,753	−28,074	−35,940	−20,668	−34.6	−41.0	−27.8	<0.001
Non-pilot Cities
	Selected	372	339	−33	−59	−8	−8.8	−14.9	−2.2	0.010
	Originator	397	430	33	−3	69	8.6	−0.7	18.8	0.072
	Alternative	365	326	−39	−66	−14	−10.7	−17.3	−3.9	0.005
	Other	358	390	32	−2	66	9.2	−0.6	19.9	0.067
	Non-selected	1,118	1,146	27	−68	120	2.6	−5.7	11.4	0.056
	All	1,496	1,484	−12	−133	105	−0.7	−8.3	7.4	0.861
	All (spending)	8,777	9,282	506	−27	1,020	5.8	−0.3	12.0	0.062

Note: Quantity of purchase is presented in 10, 000 DDD, expenditure on purchase is presented in 100, 000 CNY. Non-selected drugs include originator, alternative, and other drugs.