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Fig. 1 | BMC Public Health

Fig. 1

From: Compliance with nutrition standards in Mexican schools and their effectiveness: a repeated cross-sectional study

Fig. 1

Sample selection procedures and response rates for each implementation stage data collection. *In stages 2 and 4 school level information was obtained from a larger sample of schools (N = 122 and N = 110 respectively). Only in a subsample of those were children observed. This diagram describes the sampling process starting from said subsample. Ɨ Funds for this stage allowed for a larger number of schools to be sampled following the same procedures as stages 2 and 4

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