Abstract
ABSTRACT This study adapted and validated the NEMS-S in Costa Rica. Twenty-nine food stores were assessed, three times, by two raters. Inter-rater precision and intra-rater stability were quantified. Construct validity was determined with the known-groups method. Relative precision ranged from 0.54 to 0.77 and was 0.87 for total score. Relative stability ranged from 0.58 to 0.96 and was 0.94 for total score. For construct validity, the hypothesized relationship that supermarkets would have the highest scores was supported. The instrument has moderate to excellent precision and stability, has construct validity, and can be useful to develop policies that encourage healthy environments in food stores.
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