Table 4

Proportion (%) of purchases that were healthy in each period in the subsample according to purchaser and characteristics of the purchaser
Pre-intervention Signage Signage + taste Signage + taste + price Post-intervention P value for interaction with period Overall mean for all periods P value for main effect
Purchaser NS 0.0068
Adult only 39.8 40.8 42.4 45.3 46.8 43.5
Child only 26.6 27.3 47.5 35.8 40.8 35.8
Both present 30.6 35.4 40.3 46.8 35.6 39.0
Weight statusa 0.0014 0.0125
Non-overweight 32.6 44.7 46.1 40.5 45.9 42.1
Overweight 35.7 27.5 35.6 50.8 43.4 39.7
Sexa 0.0094 NS
Male 30.3 38.6 33.6 50.3 42.5 41.3
Female 35.3 37.5 50.6 38.0 46.0 41.3
Overall mean 33.7 37.9 43.9* 43.3* 44.9* 41.3 0.0048

n = 1032 items purchased by adults alone, n = 400 by children alone, and n = 1080 by adults and children together; A chi-square analysis was used to test for main effects and interactions.

aThe weight status and sex of the purchaser were recorded for transactions involving adults only and children only. They were not recorded when both adults and children were present during the transaction.

*Significantly different from pre-intervention, p < 0.05.

†,‡Values within a column with different superscripts are significantly different for that effect, p < 0.05.

Olstad et al.

Olstad et al. International Journal of Behavioral Nutrition and Physical Activity 2014 11:6   doi:10.1186/1479-5868-11-6

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