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. Author manuscript; available in PMC: 2015 Jul 22.
Published in final edited form as: NPJ Prim Care Respir Med. 2015 Jan 22;25:14112. doi: 10.1038/npjpcrm.2014.112

Figure 1.

Figure 1

Study participation and birth data retrieval from parental recall and General Practitioner

Abbreviations: BW: Birthweight; GA: Gestational age; GP: General Practitioner; NHS: National Health Service; PQ: parental questionnaire.

376 children had paired information (i.e. PQ & GP) for BW; 407 children had paired information for GA; 322 children had paired information for BW & GA.