PROC QLEARN

Select a Version

1. Are you using 32-bit or 64-bit SAS?

  • In SAS, go to HELP > ABOUT SAS 9.
  • Under Software Information “64” = 64-bit SAS.
  • “64” not displayed = 32-bit SAS.

2. Are you using SAS 9.4 M5 or higher?

  • Still under Software Information on the ‘About SAS 9’ screen, version is listed as SAS x.x and Mx.
Downloads
PROC QLEARN for SAS 9.4 M5 and higher
PROC QLEARN for SAS 9.4 M4 and lower
(works with SAS 9.1 – 9.3 as well)
Users’ Guide PROC QLEARN Users’ Guide (v. 1.0)

Install

If you are using a 32-bit version of SAS 9.4 M5 or higher, please email mchelpdesk@psu.edu. Download the PDF version.

Overview

PROC QLEARN, developed by the Methodology Center, is a SAS procedure for analyzing data from a sequential, multiple assignment, randomized trial (SMART) to develop adaptive interventions. The procedure uses a generalization of Q-learning, which allows treatments and covariates vary over time. Compatible with SAS version 9.1 or higher. Features include

  • works with two-decision-stages,
  • obtains confidence intervals for the regression parameters from decision stage 1,
  • enables construction of more richly-individualized adaptive interventions, and
  • takes full advantage of data generated during a SMART.

Key Terms

What is Q-learning?

Q-learning, a method developed in computer science, is an extension of the standard regression method that can be used with longitudinal data in which treatments and covariates vary over time.

What is SMART?

A sequential, multiple assignment, randomized trial (SMART) is an experimental design that enables scientists to build better adaptive interventions.
Read more

What is an adaptive intervention?

An adaptive intervention is a course of time-varying treatment designed to adapt to an individual’s changing life circumstances, response to treatment, or other designated indicator.
Read more

Recommended Citations

PROC QLEARN (Version 1.0) [Software] (2012). University Park: The Methodology Center, Penn State. Retrieved from http://methodology.psu.edu

 Ertefaie, A., Almirall, D. A., Huang L., Dziak, J. J., Wagner, A. T., & Murphy, S. A. (2012). SAS PROC QLEARN users’ guide (Version 1.0). University Park: The Methodology Center, Penn State. Retrieved from http://methodology.psu.edu