To reduce selection bias, the sample was selected using a multistage technique.
To reduce selection bias, patients were randomly selected from the hospital database.
In order to reduce selection bias, outpatients were randomly selected from site medical information rosters of active clients.
To reduce selection bias and increase sample credibility, interviewees were randomly selected from a pool of nominees.
To reduce selection bias and increase sample credibility, interviewees were randomly selected from general population nominees who engaged in the arts for enjoyment, entertainment or as a hobby.
In order to reduce selection bias among those interviewed, from those eligible, RTI randomly selected 100 HBAs for interview.
Cases and controls should be chosen from the same base population to reduce selection bias in case control studies.
We described and evaluated the performance of a new method of treatment allocation, called studywise minimization, that can avoid imbalance by chance and reduce selection bias.
Therefore, propensity score matching is applied in order to reduce selection bias on observables.
To reduce selection bias, all consecutive patients who met study criteria were included.
To reduce selection bias on observables, propensity score matching is applied, yielding a significant average treatment effect.
