Andrew Charlwood
35 lines
1.2 KiB
SQL
35 lines
1.2 KiB
SQL
-- Snowflake version: Check prescribing by VTM for last 3 months
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-- Uses unified PrimaryCareMedication table (combines EMIS + TPP)
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-- Dynamically calculates date range from latest data
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WITH LatestDate AS (
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SELECT DATEADD(DAY, 1, MAX("DateMedicationStart")::DATE) AS EndDate
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FROM DATA_HUB.PHM."PrimaryCareMedication"
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WHERE "DateMedicationStart" >= DATEADD(MONTH, -6, CURRENT_DATE())
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),
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DateRange AS (
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SELECT
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EndDate,
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DATEADD(MONTH, -3, EndDate) AS StartDate
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FROM LatestDate
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),
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SnomedCodes AS (
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SELECT "ProductSnomedCode", "ProductDescription"
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FROM DATA_HUB.DWH."DimMedicineAndDevice"
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WHERE "TherapeuticMoietySnomedCode" = '775477008' -- Tirzepatide VTM
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),
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AllPatients AS (
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SELECT DISTINCT pcm."PatientPseudonym"
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FROM DATA_HUB.PHM."PrimaryCareMedication" pcm
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INNER JOIN SnomedCodes sc ON pcm."SNOMEDCode" = sc."ProductSnomedCode"
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CROSS JOIN DateRange dr
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WHERE pcm."DateMedicationStart" > dr.StartDate
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AND pcm."DateMedicationStart" <= dr.EndDate
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AND pcm."PatientPseudonym" IS NOT NULL
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)
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SELECT
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COUNT(DISTINCT "PatientPseudonym") AS UniquePatientCount,
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(SELECT StartDate FROM DateRange) AS StartDate,
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(SELECT EndDate FROM DateRange) AS EndDate
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FROM AllPatients;
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