Some results are missing from the registry due to differences in the timing of the introduction of some of the tests for concussion patients in our Concussion Center, because patients were unable to perform certain tests such as the balance exam, refused to do them, or did not have time to complete the full evaluation.
All questionnaires described above were sent to 135 patients registered in the Swedish Ankle Registry due to planned and/or accomplished replacement or fusion of the ankle joint.
Though Korea has its own cancer registry, due to an insufficient amount of overall clinical information such as the comorbidities, use of the cancer registry data alone is not appropriate.
This situation could arise if multiple myeloma was undiagnosed at initiation of dialysis, or if the diagnosis date is in error in the cancer registry due to delayed reporting.
The different annual numbers in the Scandinavian registries are due to the differences in population sizes.
Some participants who reported cancer were not identified in the registries (possibly due to living out of state or receiving a cancer diagnosis prior to 1992) and in these cases, we used their medical records to confirm self-reported cancer.
Completeness of prostate cancer registration at 2 years postdiagnosis was lower than anticipated and varied between the registries, probably due to differences in registration processes, available data sources, rates of PSA testing and prostate biopsy, age and health of men at diagnosis and treatment patterns.
From a total of 194 enrolled patients, 140 subjects were randomized to PCI with or without embolic protection, and 54 were included in a registry arm due to the presence of angiographic exclusion criteria.
Subsequent changes to registry data due to errors or omissions found in the data are also transmitted to Statistics Canada.
Registry errors due to children moving from another province and being considered complete by the other province's schedule (another 25% or registry errors) is a problem unique to the Canadian context, where immunization schedules can vary substantially between jurisdictions.
