e0612ace61b503bafc54cfa95b9177008a20ed5b
max
  Mon Mar 8 06:41:52 2021 -0800
another tiny change to cadd docs page, refs #18492

diff --git src/hg/makeDb/trackDb/human/caddSuper.html src/hg/makeDb/trackDb/human/caddSuper.html
index 2b30b03..8bf46fb 100644
--- src/hg/makeDb/trackDb/human/caddSuper.html
+++ src/hg/makeDb/trackDb/human/caddSuper.html
@@ -18,31 +18,39 @@
 <p>
 CADD scores strongly correlate with allelic diversity, pathogenicity of both
 coding and non-coding variants, experimentally measured regulatory effects,
 and also rank causal variants within individual genome sequences with a higher
 value than non-causal variants. 
 Finally, CADD scores of complex trait-associated variants from genome-wide
 association studies (GWAS) are significantly higher than matched controls and
 correlate with study sample size, likely reflecting the increased accuracy of
 larger GWAS.
 </p>
 
 <h2>Display Conventions and Configuration</h2>
 <p>
 There are six subtracks of this track: four for every possible single nucleotide mutation, 
 one for insertions and one for deletions. All subtracks show the CADD Phred
-score on mouseover.<p>
+score on mouseover.</p>
+<p>
+PHRED-scaled scores are normalized to all potential ∼9 billion SNVs, and
+thereby provide an externally comparable unit for analysis. For example, a
+scaled score of 10 or greater indicates a raw score in the top 10% of all
+possible reference genome SNVs, and a score of 20 or greater indicates a raw
+score in the top 1%, regardless of the details of the annotation set, model
+parameters, etc.
+</p>
 
 <p>
 <b>Single nucleotide variants (SNV):</b> For SNVs, at every
 genome position, there are three values per position, one for every possible
 nucleotide mutation. The fourth value, &quot;no mutation&quot;, e.g. A to A, is always
 set to zero.<br>
 When using this track, please zoom in until you can see every basepair at the
 top of the display. Otherwise, there are several nucleotides under your mouse
 cursor per pixel and instead of an actual score, the tooltip text can only show
 the average score of all nucleotides under the cursor, which is indicated by
 the prefix &quot;~&quot; in the mouseover and averages of scores are not useful for any
 application of CADD.
 </p>
 
 <p><b>Insertions and deletions:</b> Scores are also shown on mouseover for a