Sample size calculation for planning group sequential longitudinal trials

Stat Med. 2000 Jan 30;19(2):205-20. doi: 10.1002/(sici)1097-0258(20000130)19:2<205::aid-sim295>3.0.co;2-7.

Abstract

Procedures are developed in this paper for sample size calculations for planning a group sequential longitudinal trial with various correlation structures, using a test statistic based on generalized estimating equations (Lee, Kim and Tsiatis) and group sequential boundaries based on type I error spending functions (Lan and DeMets).

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adolescent
  • Adult
  • Bone Density
  • Child
  • Data Interpretation, Statistical
  • Energy Intake
  • Humans
  • Longitudinal Studies*
  • Models, Statistical
  • Neoplasms / therapy
  • Precursor Cell Lymphoblastic Leukemia-Lymphoma / therapy
  • Randomized Controlled Trials as Topic
  • Sample Size*