Sentence examples for ascertainment and validation from inspiring English sources

The purpose of this article is to describe the case ascertainment and validation process used to evaluate the accuracy of recorded DR and DMP diagnoses, including diabetic macular edema (DMO).

27 The strengths of our study include identification of patients from a national hospital register, unbiased selection of population controls through linkage to a population registry, unbiased ascertainment and validation of head injuries among patients and controls through (re)linkage to the hospital register, and an unprecedented large number of patients.

The strengths of our study include the cohort design, the identification of study subjects from medical records, the unbiased identification of relatives through population registry linkage, the unbiased ascertainment and validation of cancer through cancer registry linkage, and the long (maximum, 60 years) and nearly complete follow-up of the entire study population.

The use of multiple source notifications ensures NorCAS has a high case ascertainment and allows validation of the data (Richmond and Atkins, 2005).

Multiple source ascertainment and cross-validation with the PMS, NorCAS and the Office for National Statistics contribute to its quality (Glinianaia et al., 2002).

Further, the potential for selection biases were also minimized in the present study, via the ascertainment, validation, and comparison of groups within the study cohort on several potential confounding factors.

Self report, followed by retrieval and validation of medical records has the disadvantage of incomplete ascertainment due to drop out and low response rates to follow-up questionnaires.

89 90 Only 30% of the instrument included quality assessment elements pertaining to the validity and appropriateness of the operational aspects of exposure ascertainment, and only 36% addressed quality attributes of validation of outcome ascertainment approaches.

This systematic review and validation study examined new and existing case definitions for depression case ascertainment in administrative data.

Ascertainment of interval breast cancers poses a number of challenges that include identification (requiring linkage to cancer registries), standardisation, and validation of review and categorisation methods, as well as access to the films taken at diagnosis.

Study design;  Selection and/or definition of population of interest;  Sampling and bias avoidance;  Sample size estimation;  Access to selected subjects (managing and reporting non-participation);  Case definition (including diagnosis and timeframe);  Case ascertainment (including diagnostic validation of questionnaires);  Burden estimation;  Reporting (methods and results).