BASUG - Past Meeting

WHAT:

WHEN:

WHERE:

AGENDA:

9:00 - "Comparing Clinical Trials Data Using Population Trees"

Population Trees generated using the SAS/GRAPH(r) GCHART Procedure are a great way to interpret data from two different populations. In this paper, Population Trees are used to compare the psychological symptoms obtained from clinical trials data for two different treatment groups over a 28 day cycle. This paper will also discuss the use of how color and/or shading, as well as, annotated labels help to communicate information quickly and easily. The target audience is for both beginner and intermediate audiences and can be adapted to any platform.

Data visualization techniques like Multidimensional Preference Analysis are useful for answering questions such as: Who are my customers? What do they think about my product? How is my product perceived compared to those of my competitors?

In many cases, these tools provide more intuitively satisfying and accessible answers than traditional numerical techniques. This paper explores several methods for data reduction (using principal component analysis) to permit perceptual mapping in two and three dimensions.

Often a researcher is in the position where he/she has n variables X1 ... ,Xn and desires to reduce the number for later analyses. The techniques of principal components, variable clustering, and battery reduction are statistical techniques appropriate for this reduction. Here, we will briefly review the concepts of these techniques, as well as present SAS(r) macros which perform battery reduction and graphical variable clustering. SAS(r) currently does not have canned procedures to handle these two techniques.

DIRECTIONS:

Directions via MBTA:

• Take "Red Line" to Kendall Square stop.
• When leaving train, follow signs marked "Escalator to Main Street".
• At street level, walk through Cambridge Marriott Hotel lobby to Broadway entrance.
• Turn right and walk down Main Street for approximately one and a half blocks.
• Pass the entrances for the 101 Main Street and One Main Street buildings and pass the BayBank terminal to the ROPA conference center.

Directions from I-93/Central Artery:

• Proceed to exit 26 "Storrow Drive/Cambridge".
• Following Storrow Drive, stay in left lane and take 1st exit on left "Government Center/Kendall Square".
• At end of ramp is a red light - take a right onto the Longfellow Bridge.
• Continue straight across bridge and onto Main Street, Cambridge. The first building you will see on the right immediately crossing the bridge is One Main Street - the ROPA conference center is at the near end of it. Drive past One Main Street and past the connected building, 101 Main Street, and take right at the traffic light. Then, take the second right into the parking lot.
• From the parking lot, go back to Main Street and take a left.
• Pass the entrances for the 101 Main Street and One Main Street buildings and pass the BayBank terminal to the ROPA conference center.