A process evaluation of the Supermarket Healthy Eating for Life (SHELf) randomized controlled trial

Table 4 Impact of intervention dose on purchase and consumption of fruits, vegetables and beverages at post-intervention

Dose-related variables	Fruit purchase (g/week)	Fruit consumption (servings/day)^a	Vegetable purchase (g/week)	Vegetable consumption (servings/day)^a	Low-calorie carbonated beverage and water purchase (mL/week)	Low-calorie carbonated beverage and water consumption (servings/day)^a	High-calorie carbonated beverage purchase (mL/week)	High-calorie carbonated beverage consumption (servings/day)^a
	β (95 % confidence interval)
Number of newsletters read All vs < all^b (n = 285)	2.49 (−241.77, 246.75)	−0.06 (−0.27, 0.14)	113.82 (−103.66, 331.31)	0.06 (−0.17, 0.30)	188.98 (−502.78, 880.74)	0.97** (0.34, 1.60)	507.94 (−407.14, 1423.02)	−0.07 (−0.16, 0.01)
Used recipes Yes vs no^b (n = 282)	128.72 (−114.44, 371.88)	0.24* (0.03, 0.45)	−13.87 (−233.24, 205.50)	0.27* (0.05, 0.49)	248.27 (−317.73, 814.26)	0.38 (−0.24, 1.00)	95.23 (−635.92, 826.38)	−0.05 (−0.16, 0.06)
Accessed price discounts on fruit and vegetables Yes vs no^b (n = 274)	238.93 (−152.89, 630.75)	0.28 (−0.08, 0.63)	518.86** (158.41, 879.31)	0.48** (0.13, 0.84)	n/a	n/a	n/a	n/a
Accessed price discounts on beverages Yes vs no^b (n = 221)	n/a	n/a	n/a	n/a	1004.24* (134.44, 1874.03)	0.48 (−0.23, 1.19)	1074.80 (−656.43, 2806.03)	−0.02 (−0.13, 0.08)

Beta coefficients represent the between-group mean differences in purchasing and consumption of fruits, vegetables and beverages. Linear regression models controlled for baseline values of the outcome, intervention group, age, country of birth, catchment area, marital status, household income, and the number of children living at home
^a1 serving of fruit = 150 g; 1 serving of vegetables = 75 g; 1 serving of beverage = 125 mL
^bIndicates reference category
*p < 0.05; **p < 0.01; bolded values highlight significant differences

ISSN: 1479-5868