Update cdm54.html

Correction "OBSERVATOIN_PERIOD" to "OBSERVATION_PERIOD" in line 1269
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AlbertLeeUCSF 2024-06-20 11:22:29 -07:00 committed by GitHub
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@ -1266,7 +1266,7 @@ occurrence or the first high quality occurrence of a Clinical Event
(Condition, Drug, Procedure, Device, Measurement, Visit) is defined as
the start of the OBSERVATION_PERIOD record, and the end date of the last
occurrence of last high quality occurrence of a Clinical Event, or the
end of the database period becomes the end of the OBSERVATOIN_PERIOD for
end of the database period becomes the end of the OBSERVATION_PERIOD for
each Person. If a Person only has a single Clinical Event the
OBSERVATION_PERIOD record can be as short as one day. Depending on these
definitions it is possible that Clinical Events fall outside the time