Changes in out-of-home food purchasing following the introduction of England's calorie labelling regulations: a population-level controlled interrupted time series analysis.

However, this analysis indicated an immediate (level) reduction of 97 kcal per person (95% CI −188.8 to −5.2) from OOH meals, and a negative trend change in calories purchased from fish and chip meals (−1.3 kcal per person per week, 95%CI −2.0 to −0.6).

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Overall, there was a decreasing trend in calories purchased OOH in both intervention and control groups, although this was not statistically significant for all outcomes studied.

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There was some evidence of an increasing trend in calories purchased from chains by 9 kcal per person per week (95% CI 0.15 to 18.32) (see figure 2 ).

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