Sentence examples for strata cluster from inspiring English sources
An analysis plan was prepared using strata, cluster and sample weights.
To do this we fit multivariable-adjusted logistic regression models with the SURVEYLOGISTIC procedure, again specifying strata, cluster, and weight variables (CDC-NCHS 2010a, 2010b).
Analyses were conducted using SUDAAN 10.0 software to account for the strata, cluster, and weight variables that define the complex sampling approach in the National Survey of Residential Care Facilities.
All models were fitted using the cph function of the Design package within R (Version 2.12.2). 32 33 The strata, cluster and frailty functions were used to fit the extended CoxPH models.
We obtained national prevalence estimates for the outcomes by using the SURVEYMEANS procedure, specifying strata, cluster, and weight variables to account for the complex sampling design characteristics of NHANES (CDC-NCHS 2010a, 2010b).
Recruitment took place through primary schools, which were randomly selected without replacement from a stratified (Government, Catholic, Independent strata) cluster sample of all such schools in metropolitan Melbourne educational regions with 10 or more students enrolled in Grade 3. The metropolitan area was chosen in order to facilitate follow up assessments.
This work uses a survey of public health to systematically illustrate the effects of incompletely accounting for strata, clustering, and weights.
The latter were stratified by clinical center and age and, within each strata, clustered in blocks of varying sizes.
These two procedures are almost the same except that the SURVEYLOGISTIC procedure includes strata and cluster statements, while the LOGISTIC procedure does not include strata and cluster statements.
A statistician blinded to the identity of the strata, and clusters assigned the clusters within each stratum by simple random allocation to either the training or the control.
All analyses were adjusted for design effects (sample weight, strata, and cluster).
