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The external validity of the results may be compromised by the sample recruitment method that did not engage women who are at risk for delivering babies with low birth weight.
Extracted information included study type, year(s), and location of data collection, sample recruitment method, number of women included in the study, number of live births, age at assessment of children's HCV infection status, and definition of HCV infection among children, as well as the number of children followed up and the number considered infected, separately by maternal HIV serostatus.
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Using respondent driven sampling (RDS) recruitment methods, we recruited 378 MSM (including 15 seeds) over 30 weeks in 2008.
A summary of descriptive data for the whole sample, categorised by recruitment method, is shown in Table 1.
Using innovative sampling and recruitment methods and online data collection techniques, Tefft et al. (2014) present survey results that quantify the sizable racial disparities in delayed driving licensure among 18-year-olds and that dispel the widely held misconception of graduated driver licensure programs being the main reason for delayed licensure.
Full details of the sampling and recruitment methods have been published elsewhere.
Sampling and recruitment methods were identical, and both surveys were conducted by the same organisation.
An overview of the projects' details, including sampling frame, recruitment methods, participation rates and challenges is presented in Table 2.
The aim of this paper is to describe and compare sampling and recruitment methods used in national health examination surveys in seven European countries.
The main limitation of this study was the potential sample bias resulting from the recruitment method used (ie, snowball sampling, recruiting participants via educational institute, recruiting from one city).
Respondent-driven detection, a method of detection derived from snowball sampling, is a chain recruitment method that allows for systematic sampling of contact persons of participants.
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