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Fig. 1 | BMC Medical Research Methodology

Fig. 1

From: Sources of potential bias when combining routine data linkage and a national survey of secondary school-aged children: a record linkage study

Fig. 1

Flow chart of school recruitment process for data linkage pilot study. This included 63 HBSC schools and 1 non-HBSC school. The decision to omit the non-HBSC school from randomisation was taken by the researchers as the school was considered not to have had adequate time to make an informed decision regarding participating in the pilot due to it registering so close to the initial deadline

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