pg_stat_user_tables

I'm selecting tables from my db using query:
SELECT
pg_stat_user_tables.relname
FROM
pg_stat_user_tables
WHERE
(pg_stat_user_tables.relname LIKE 'name_hosp_%')

The problem I have is that the table names returned by this query are
different from the ones in my db. Not all of them but 10%-20%. The
common problem I noticed is adding "_" at the end of table name and
truncating name "hospital" to "hosp".
Anyone ever had similar problem? Any other way to get list of table
names?

Thanks,
JP