Dear all
We are converting EMR data to CDM.
The Observation_period table is produced by the following method.
“Periods of continuous enrollment is calculated by combining monthly records and
recording the observation_period_startdate for the first period as the enrollment start date
and observation_period_enddate for the last period as the enrollment end date. If the
time between the end of one enrollment period and the start of the next is 30
days or less, treat this as continuous enrollment.”
After the conversion, Achilles_heel report that looks at “events outside observation periods”.
We have checked the data to resolve this error.
In Korea, there are cases where a doctor prescribes medication without a visiting enrollment,
or patient comes back to the hospital a few days after the treatment prescription, examination prescription and then the treatment or examination is carried out without a visiting enrollment.
If it comes without visiting enrollment, it will be recorded as before or after visit enrollment.
That is, this information is an event that the patient visited the hospital correctly,
but the visit registration is not recorded and an Achilles_heel error occurs.
In order to include these data in the observation period,
First, we try to generate observation_period using the drug, examination, treatment, and enrollment tables in EMR.
And then, the time between the end of one enrollment period and the start of the next is 6 months or less, treat this as continuous enrollment.
First point, would we use other tables(drug, examination, treatment table etc.) as well as enrollment tables to create observation_period?
Second point, would we window period 6 months? How long will it be appropriate?
We checked the issues, the claim database has used a window period 1 year based on insurance registration. And EHR databases have used that CCAE database 32days, and GE database 12months.
We would like to hear from OHDSI members if this method is suitable for solving the problem of observation_period invalid in Korea.