Table 1 Datasets of DNSGP-2, used in this study

Videotaped consultations

Consultation length

Unique patient code

1,967 consultations

Unique GP code

Postal GP questionnaire

Waiting time to get an appointment

Unique GP code

184 GPs

Recording of type of contact in Electronic Medical Files (six weeks)

Home visit (yes or no)

Unique patient code

67,709 consultations

Unique GP code

Practice administration

Insurance status

Unique patient code

399,068 patients

Sex of patients

Age of patients

List size

Zip code (for selection of deprived areas)

Patient questionnaire

Self-rated health

Unique patient code

294,999 patients

Database of all participating GPs in DNSGP

Age of GP

Unique GP code

195 (GPs who participated in DNSGP)

Sex of GP

Unique practice code

Practice type