Skip to main content

An extension of the Wilcoxon rank sum test for complex sample survey data

Buy Article:

$43.00 plus tax (Refund Policy)

Summary.  In complex survey sampling, a fraction of a finite population is sampled. Often, the survey is conducted so that each subject in the population has a different probability of being selected into the sample. Further, many complex surveys involve stratification and clustering. For generalizability of the sample to the finite population, these features of the design are usually incorporated in the analysis. Although the Wilcoxon rank sum test is commonly used to compare an ordinal variable in bivariate analyses, no simple extension of the Wilcoxon rank sum test has been proposed for complex survey data. With multinomial sampling of independent subjects, the Wilcoxon rank sum test statistic equals the score test statistic for the group effect from a proportional odds cumulative logistic regression model for an ordinal outcome. Using this regression framework, for complex survey data, we formulate a similar proportional odds cumulative logistic regression model for the ordinal variable, and we use an estimating equations score statistic for no group effect as an extension of the Wilcoxon test. The method proposed is applied to a complex survey designed to produce national estimates of healthcare use, expenditures, sources of payment and insurance coverage.
No References
No Citations
No Supplementary Data
No Data/Media
No Metrics

Document Type: Research Article

Affiliations: 1: Veterans Affairs New York Harbor Healthcare System, New York, USA 2: Harvard Medical School, Boston, USA 3: Florida State University, Talahassee, USA 4: University of North Carolina, Chapel Hill, USA 5: University of Pittsburgh, USA

Publication date: 2012-08-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more