This page explains how Richard Catlin (USATT# 30231)'s rating went from 1815 to 1786 at the 1996 Polycystic Kidney Disease held on - 4 May 1996. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.