We repeated data abstraction for a sample of the primary outcome measures and found it to be reliable.
Independent re-abstraction of a sample of 60 charts was conducted to validate the data extraction process.
Across both geographical sites, double data abstraction of a 5% sample of hospital data (dates of referral, first appointment, diagnosis and stage) confirmed an acceptable level of agreement (>80% for dates; >90% for diagnosis and stage).
Whilst routine clinical data may be less accurate than data collected specifically for research purposes we carefully checked the reliability of data from different sources, where possible (e.g. electronic and paper medical records and laboratory results) and completed an independent abstraction of a random sample of data from medical records to improve the validity of the data we have used here.
All rounds of IQC included re-abstraction of a random sample of 25 cases; each of the abstractors completed five cases that were re-abstracted by the lead abstractor.
The average time spent on data collection was 8.5 days per hospital for the five QIs related to medical or anaesthetic record content, and 5 days for AMI QIs (including sample of the medical records, retrieval from archives, abstraction of the sample, data entry in the computer and verification of data quality).
In this first step – making abstraction of the eventual sample selection bias – we compare the adjusted R-squared from a binomial probit estimation of Eqn. (1), with and without including the set of dummies for the type of mismatch between the education level and the occupational attainment in the last job held in the home country twelve months prior to immigration.
Therefore, the DTW-based feature combination does preserve the commonality of the samples, which is expected to be the abstraction of a voice-tag.
Validation of case/control status was conducted at each site through manual abstraction of random samples of patient charts.
Data were collected electronically and verified through manual chart abstraction of targeted samples.
This sampler includes a huge mobile that is too big for the gallery's main room and a bright red nonmoving abstraction of a winged lion.
