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Table 2 Method of initial approach to families, by region

From: Assessment of data quality in a multi-centre cross-sectional study of participation and quality of life of children with cerebral palsy

Region Method of approach
North England Indirect Telephone Child's paediatrician phoned; followed by phone call from researcher
West Sweden Direct Letter – opt-out Researcher sent opt-out letter, followed by phone call
Northern Ireland Indirect Letter – opt-in Child's primary notifier to the register sent opt-in letter, follow-up letters and in some cases telephoned some families
South East France Direct Letter – opt-out Researcher sent opt-out letter, followed by phone call
South West Ireland Direct Telephone Researcher phoned, followed by letter
East Denmark Direct Letter – opt-out Researcher sent opt-out letter, followed by phone call
Central Italy Indirect Telephone Doctor, social worker or therapist phoned family, followed by phone call by researcher
South West France Direct Telephone Researcher phoned, followed by letter
North West Germany Indirect Face-to-face Child's primary carer approached family face-to-face