Table 1

Descriptive statistics for household purchasing of biscuits, crisps and savoury snacks

	Biscuits	Crisps	Savoury snacks
Weekly calories (kcal) purchased per person in household
Mean	1239	801	665
25th percentile	493	377	287
Median	917	624	489
75th percentile	1563	999	848
Mean percentage of calories (kcal) purchased on price promotion per week	24.5%	19.8%	18.3%
Mean weekly calories (kcal) purchased on price promotion per person in household	279	156	120
Mean percentage of calories (kcal) purchased on volume promotion per week	13.8%	23.6%	23.9%
Mean weekly calories (kcal) purchased on volume promotion per person in household	198	245	218
Observations	199 886	135 399	118 654
Households	3024	3024	3024