Completion of registration of risk factor variables during telephone vs on-site follow-up after myocardial infarction : a nationwide observational study in 101 199 patients from contemporary clinical practice in Sweden
Objectives The objective of this study was to assess the completeness of registration of secondary preventive variables comparing on-site visits with telephone consultations during follow-up after myocardial infarction. Design This was an observational study based on the Swedish quality registry SWEDEHEART. Setting and outcome measures We analysed the proportion of missing values for major seconda