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The KNHANES, a nationally representative, complex, stratified, and multistage sample survey, was conducted by the Ministry of Health and Welfare, Korea.
The National Center for Health Statistics conducted this complex, stratified, multistage sample survey from 1988 to 1994 among a representative sample of the U.S. civilian, noninstitutionalized population aged ≥2 months.
The Third National Health and Nutrition Examination Survey (NHANES III) is a complex, multistage sample survey conducted by the National Center for Health Statistics of the Centers for Disease Control and Prevention from 1988 through 1994.
NHANES III is a complex, multistage sample survey conducted by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention CDCC) (35, 43), during 1988–1994.
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Because NHANES is a complex multistage sampling survey, we used PROC SURVEYREG and PROC SURVEYLOGISTIC in SAS version 9.2 (SAS Institute Inc., Cary, NC) to calculate regression parameters and 95% CIs after accounting for sampling weights and survey methods.
Multistage sampling was employed.
Multistage sampling technique was used.
Multistage sampling method was used.
NHANES is conducted by the National Center of Health Statistics, Centers for Disease Control and Prevention, as a cross-sectional, stratified, multistage probability sample survey of the US civilian, noninstitutionalized population [ 24, 25].
NHANES is conducted by the National Center of Health Statistics, Centers for Disease Control and Prevention, as a cross-sectional, stratified, multistage probability sample survey of the U.S. civilian, noninstitutionalized population [ 17, 18].
Because NHANES III is a multistage, complex sample survey, all statistical analyses must account for sample weights and the survey design to produce unbiased national estimates and appropriate standard errors.
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