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The generalizability of results may be limited by errors associated with the sampling frame for study participants, mail survey data collection, survey non-response, and item non response.
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As a sampling frame for studies nested within the cohort, the 78 062 spatulas were stratified according to the 12-month period in which they were taken and 5-year age groups.
Similar patterns of reasoning motivated colleagues in Australia and in England to propose 8 – 15 years of injecting as their sampling frame for studies of how IDUs there had remained uninfected with hepatitis C [ 13].
During the last decade, over a hundred peer-reviewed manuscripts were published that either used the full Nouna HDSS database for descriptive epidemiological studies or that used the HDSS population as a sampling frame for studies on various research topics as further described below.
To establish a reference frame for studying intra-LCR22 duplication activity and to gain insight to their disease susceptibility, we decided to decompose SDs to basic duplication subunits, which represent the smallest continuous sequences that have been involved in at least one independent intra-LCR22 duplication event.
SG and BG developed the household, state and national level models, SS co-ordinated air pollution measurements, DB provided assistance with model development, NB and KRS provided the framing for study design and shaped the analyses to fit the requirements of the GBD-2010 assessment.
Existing surveillance databases in each HDSS provides reliable sampling frame for the study subject selection, and it allows for random selection of a certain number of study subjects within each age-group strata.
Such centres may therefore be suitable sampling frames for studies of these age groups.
This method was chosen for this study due to the unavailability of a sampling frame for the study population.
The sampling frame for the study was the bars and pubs from the four study areas which had previously participated in a survey of North West hospitality premises [ 8].
The sampling frame for this study will be existing participants in an established observational cohort study of knee pain and osteoarthritis, known as The Clinical Assessment Study of the Knee - CAS K) [ 23, 24].
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