3. A selection from the Oslo adult population sample called the adult immigrant sample: immigrants who had attended the physical examination and delivered the second questionnaire.
In addition to its regular menu, the Fish Cellar offers a lavish sampling menu consisting of a selection from the excellent raw bar, a three-pound lobster for two, mushroom couscous, mesclun salad and chocolate for dessert.
Also, many substance-affected parents will not let their children participate in the programme, thus creating a selection effect in the sample from the start.
This resulted from a selection of the initial sample: not all asylum seekers at T1 had obtained residence permits at T2 (see Methods), which explains the over-representation of longstanding residence permit holders in the two-wave cohort.
There is a selection bias in the sample with opinion from 29 ERC members who agreed to participate with non-participation by members from three ERCs.
To help overcome this limitation, we selected our participants via a simple number-randomization scheme to reduce the selection bias from the sample.
Sampling weights that account for the unequal probabilities of selection resulting from the sample design, nonresponse, and oversampling of certain subgroups were used for all analyses.
During the session, participants were invited to appraise and interact with a selection of sample materials from the programme including manuals, activity workbooks and toolkit items.
In addition, we included a selection of DNA samples from the plastid gene study of Der et al. (2009) to obtain nuclear gene sequences.
The study sample is similar to the screened sample in all characteristics tested, which suggests successful random selection of the sample from the screened population.
Baseline demographic and QoL data were collected from all study participants after selection of the sample.
