. 2023 Aug 18;23:1578. doi: 10.1186/s12889-023-16395-z

Table 3.

Linear trend post-introduction: treatment and control sites

		Sugar-free drinks (Total ml)	Sugar-sweetened drinks (Total ml)	Sugar content sales (Grams per ml)	Proportion Change² Sugar content sales
Month 32	Treatment site	-490,000.00^a	5,858,613.00	0.0040^a	0.0692^a
	Treatment site	(111,000.00)	(3,310,000.00)	(0.0010)	(0.0115)
	Control site	257,000.00^b	5,763,805.00	-0.0013	-0.0141
	Control site	(111,000.00)	(3,300,000.00)	(0.0009)	(0.0115)
	Difference	-748,000.00^a	94,807.95	0.0053^a	0.0834^a
	Difference	(156,000.00)	(4,670,000.00)	(0.0013)	(0.0162)
Month 35	Treatment site	64,600.00	15,131,195.00^b	0.0013	0.0097
	Treatment site	(238,000.00)	(6,030,000.00)	(0.0014)	(0.0196)
	Control site	643,000.00^a	19,230,158.00^a	-0.0011	-0.0135
	Control site	(238,000.00)	(6,060,000.00)	(0.0014)	(0.0196)
	Difference	-578,000.00	-4,098,963.00	0.0024	0.0233
	Difference	(337,000.00)	(8,370,000.00)	(0.0020)	(0.0277)

Legend: ^a (Significant at 1% & 5%); ^b(Significant at 5% only)

1. The monthly change is: $Δ = {SugarContent}_{t} - {SugarContent}_{t - 1}$ where t is the current month, and t-1 is the previous month

2. The proportion change is: $p r o p o r t i o n c h a n g e = \frac{{SugarContent}_{t} - {SugarContent}_{t - 1}}{{SugarContent}_{t - 1}}$