frequency classes

[obophenotype-user]

Originally reported on Google Code with ID 55

we should create a proper mechanism to record frequency:

From the HPO annotation guidelines: A percentage value reflecting the frequency with
that the particular abnormality occurs in patients having the syndrome. Another possibility
is to specify the number n of patients that have this feature out of the m patients
investigated (n of m)

If exact data are not available, categories from the following table may also be used
for indicating the frequency of a phenotypic feature. As a rough guide, the HPO consortium
interprets the following categories as having roughly the following numerical meaning:


Description  Percent of patients 
very rare 1 %
rare    5 %
occasional 7.5 %
frequent 33 %
typical  50 % 
variable    ? (prob. 30%-70%)
common 75 %
hallmark  90 %
obligate  100 % 

Note that PATO has some frequency classes, but these refer to rates and not percentages.

Reported by [email protected] on 2014-09-13 04:41:24

[drseb]

we have decided on a new standard together with orphanet. will put that on hpo-website soon:

Human-Phenotype-Ontology/Human-Phenotype-Ontology.github.io#2