Discussion
This study examined the relationship between an essential
set of TKRs that comprise PH work and 36 PH job classes.
The data are a sample representing about 1% of the nation’s
estimated 190,000 local PH workers and only 19 of 2,532
LHDs, which limits the generalizability of our findings.8
Nevertheless, there is no other source of standard detail on
PH work performed by individual employees. This study
suggests that PH workers within a specific job class tend to
be more similar in the tasks they perform andmore variable
in the knowledge they possess and in access to resources.