Table 1.

Site characteristics.

	Site
	1	2	3	4	5	6
Type of site	Depot	Office	Office	Manufac-turing	Office	Manufac-turing
No of employees	960	2176	165	749	816	334
Percentage of employees that are full-time	95.7	96.0	97.0	92.3	82.2	99.7
Mean employee agea	40.1	36.5	40.9	44.3	38.0	34.9
Percentage of employees that are female	21.9	49.7	40.0	17.4	55.1	16.2
Predominant occupational groupb	D&E	C1&C2	C1&C2	D&E	A&B	C1&C2
Cost of cooked meal (£)	1.17	3.90	2.45c	2.45c	2.45c	2.52d
Cost of pre-packaged item pre-intervention (£)	0.41	1.02	0.63	0.64	0.73	0.99
Cost of pre-packaged item post-intervention (£)	0.44	1.06	0.68	0.71	0.74	1.07
Usual number of daily cooked meal options offered by site	3	4	3	4	5	3
Number of different (healthier) pre-packaged items sold at baseline e,f	89 (28)	150 (42)	33 (3)	25 (8)	67 (21)	96 (24)
Percentage of energy (kcal) purchased from targeted food categories from cooked mealsg	47.0%	86.7%	83.6%	84.3%	75.6%	57.2%

^aReported in age bands, and estimated using the mean age value for employees in each age band.

^bA&B: Higher and intermediate managerial, administrative and professional occupations; C1&C2: Supervisory, clerical and junior managerial, administrative and professional occupations; D&E: Semi-skilled and unskilled manual occupations.

^cChanged to £2.65 for last 5 weeks of study.

^dMean value as no standard price.

^eProxy for number of items available pre-intervention; where multiple products are sold under one till button, all known possible items are taken as being sold.

^fStudy criteria for healthier pre-packaged items: Cold drinks: under 50 kcal per pack; Savory snacks: under 120 kcal per pack; Sweet snacks: under 150 kcal per pack.

^gBased on pre-intervention sales.