Each survey was based on a nationally representative random sample drawn from the National population register.
We examine pioglitazone and rosiglitazone use based on a nationally representative audit of office-based physicians.
The NPHS is a longitudinal study based on a nationally representative community sample assembled by Statistics Canada (Canada's national statistical agency) in 1994.
Nearly one in three (32.8%) nursing home residents has diagnosed diabetes based on a nationally representative study that analyzed medical charts, minimum dataset records, and prescription claims files to identify people with diabetes (7).
The HRS is a longitudinal population-based study of community dwelling adults aged 50 or older which selects participants based on a nationally representative multistage probability sample of households (Juster 1995).
The data, gathered by the UN, was based on a nationally representative telephone survey of 1,000 adults.
The American Time Use Survey is based on a nationally representative sample of about 26,000 individuals.
Data are based on a nationally representative survey of 1,204 American adults, aged 18 and older.
These findings are based on a nationally representative phone survey of 802 parents and their 802 teens ages 12-17.
Methodology: Data cited in this report are based on a nationally representative sample of 4,000 UK consumers aged 18-75.
The Kaiser study was based on a nationally representative telephone survey conducted last spring among 1,065 parents with children 6 months to 6 years old.
