Encara no tenim significats per a "stratify random".
1A stratified random sampling method was first used to identify suitable subjects.
2Design: Epidemiological survey in a proportionally stratified random sample of nursing homes.
3Methods: Participants were selected by age- stratified random sampling from electoral lists.
4Study design: Diagnostic test study with stratified random sampling of hospitalizations for chart review.
5Sample: Hospitals were selected using a stratified random sampling method.
6The interviewees were selected using a stratified random cluster sampling.
7The NIS is a 20% stratified random sample representative of all United States hospitals.
8Multistage stratified random sampling, with probability proportional to size was used to select a representative sample.
9A population of 25,228 children was selected using stratified random sampling method.
10Using stratified random sampling, we enrolled women age 15+.
11The Nationwide Inpatient Sample represents a 20% stratified random sample representative of all United States hospitals.
12Methods: A structured, open-ended questionnaire was mailed to a regionally stratified random sample of 90 diabetes nurse educators.
13A stratified random sample (n = 285) with differing probabilities was selected for a second-stage interview.
14From the approximately 10,000 participants, stratified random samples were selected for detailed clinical evaluation.
15One feature is that clinical evaluation for Alzheimer's disease is confined to a stratified random sample of all participants.
16A survey assessing barriers and other factors was distributed to a stratified random sampling of older women with CAD.