Table 3.
Perceptions of corner stores, store patronage, food purchasing and fruit and vegetable consumption by time and intervention status among the Proyecto MercadoFRESCO patron sample (n 957), East Los Angeles and Boyle Heights, California, USA, mid-2011 to 2015
| Intervention
|
Comparison
|
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Baseline (n 264)
|
Follow-up (n 208)
|
Baseline (n 286)
|
Follow-up (n 199)
|
Mean or percentage difference (follow-up – baseline)
|
||||||
| Mean or % | SD | Mean or % | SD | Mean or % | SD | Mean or % | SD | Intervention | Comparison | |
| Overall perceptions about corner stores score (range: 0–15) | 10·8 | 3·1 | 13·1*** | 2·1 | 10·3 | 3·2 | 11·1** | 2·7 | 2·3 | 0·9*** |
| Shops at corner store at least a few times per week† | 83·7 | – | 88·5 | – | 86·4 | – | 94·5** | – | 4·7 | 8·1 |
| Dollars spent on food per week | 120·5 | 74·3 | 122·7 | 72·5 | 132·4 | 80·0 | 128·9 | 73·5 | 2·2 | −3·6 |
| Dollars spent on fruits and vegetables per week | 40·0 | 30·7 | 40·8 | 27·5 | 45·4 | 36·3 | 46·1 | 37·8 | 0·9 | 0·7 |
| Percentage of dollars spent on fruits and vegetables | 34·1 | 15·7 | 35·7 | 16·5 | 35·3 | 16·6 | 36·8 | 25·1 | 1·7 | 1·5 |
| Number of fruits and vegetables purchased at corner store at this visit | 0·2 | 0·6 | 0·5*** | 1·1 | 0·5 | 1·2 | 0·4 | 0·9 | 0·3 | 0·0*** |
| Servings of fruits and vegetables consumed each day | 4·8 | 3·0 | 4·9 | 2·7 | 5·2 | 3·1 | 4·9 | 2·8 | 0·1 | −0·3 |
Significant differences in continuous variables were tested between intervention baseline and follow-up using independent-sample t tests, comparison baseline and follow-up using independent-sample t tests tests, and mean difference (follow-up – baseline) for intervention and comparison using an F test on the interaction term of a linear regression. Significant differences in binary variables were tested between intervention baseline and follow-up using χ2 tests, comparison baseline and follow-up using χ2 tests, and percentage difference (follow-up – baseline) for intervention and comparison using a Wald test on the interaction term of a logistic regression. This Wald test can be thought of as testing whether the relative change (on an odds ratio scale) is the same in the intervention and comparison groups. Percentage difference may vary slightly from reported percentage follow-up – reported percentage baseline due to rounding.
P < 0·01,
P < 0·001.
Binary variable; 0 combines ‘a few times a month‘ and ‘every once in a while’; 1 combines ‘a few times a week’, ‘more than once per day’ and ‘once per day’.