Strengths of the study are the large size and age range of the community sample, and the distribution of the enrolment sources consistent with the geographical distribution of all Regional FPs warranting to some extent the sample representativeness despite the convenience sampling procedure.
This chapter explores the key methodological elements of these registries in terms of patient enrolment, the source of exposure and outcome information, outcome definition and ascertainment and comparator groups and how these elements may influence the reported risk estimates.
BRCA1/2mut status was obtained as part of the clinical trial enrolment, and sources included the patient's genetic test results, and in one case, deleterious mutation risk outcome estimates using the BRCAPro model (BayesMendel Lab, http://bcb.dfci.harvard.edu/bayesmendel/brcapro.php).edu/bayesmendel/brcapro.php
To the extent that age of enrolment is a source of variability in impact sizes, our estimates of impact size may therefore have larger standard errors than the Abecedarian study.
According to Kumar, in India, admission to medical school is so profitable that the transactions are patronised by politicians who take the enrolment payments as a source of income [ 20].
We estimated the likelihood of exposure to elevated nitrate from drinking water (⩾10 mg nitrate per litre) based on the census tract location of a participant's residence at enrolment, as the usual source of drinking water was not ascertained for the cohort.
MIT's president, Susan Hockfield, has started an "energy initiative" to promote research into alternative sources, storage and cleaning up conventional sources; and student enrolment into energy-related courses has tripled over the past five years.
The General Registry Office of Forlì was the data source for the enrolment of the cohort.
Every one or two weeks we approached the source population, until enrolment of a sufficient number of patients from a particular GP was realised.
Along with standard information for progress reports, the content of such reports would include registry-specific information such as how the registry is being managed, who has access, the evolution of the population (i.e., enrolments and withdrawals), and the source(s) of funding of the registry.
This is the only source of information on enrolment rates for children between 5 and 6 years According to this report, the enrolment rates for 5- to 6-year-olds in 2005 06 was 27.27% (79,454 children including 39,884 girls), which represents an increase from 24.56% in 2004 05.
