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Table 4 Mixed-effects regression results expressed as percentage change in the number of items purchased

From: Altering the availability of healthier vs. less healthy items in UK hospital vending machines: a multiple treatment reversal design

 Mean number of items sold per week per machine* (s.d.)Percentage change
(95% CIs)
p-value
(Kenward-Roger)
SnacksStandard167
(209)
RefRef
Decrease Less healthy155
(191)
77.8%
(3.6, 205.2)
0.037
 & Increase Healthier182
(226)
−27.4%
(− 58.9, 28.1)
0.262
Decrease Healthier149
(185)
64.1%
(−3.6, 179.5)
0.067
 & Increase Less healthy171
(224)
− 39.5%
(− 65.5, 6.2)
0.078
DrinksStandard99
(135)
RefRef
Decrease Less healthy74
(96)
12.5%
(−21.0, 60.2)
0.509
 & Increase Healthier79
(97)
13.4%
(−41.1, 27.3)
0.461
Decrease Healthier94
(123)
38.0%
(−5.3, 101.1)
0.093
 & Increase Less healthy103
(155)
−29.2%
(− 52.6, 5.7)
0.091
  1. * Unadjusted means; Means for increases represent periods when healthier options were increased while less healthy options remained decreased or periods when less healthy options were increased while healthier options remained decreased