identify negative culture

[hidoyebi]

The org_name column in the microbiologyevents table contains the data "CANCELLED" (org_itemid: 90760). Is this a case the culture was implemented but the culture was cancelled?

In order to identify negative culture, should I add the condition if org_name="CANCELLED"?

https://github.com/MIT-LCP/mimic-code/blob/main/mimic-iv/concepts_postgres/sepsis/suspicion_of_infection.sql

me AS (
    SELECT micro_specimen_id
        -- the following columns are identical for all rows
        -- of the same micro_specimen_id
        -- these aggregates simply collapse duplicates down to 1 row
        , MAX(subject_id) AS subject_id
        , MAX(hadm_id) AS hadm_id
        , CAST(MAX(chartdate) AS DATE) AS chartdate
        , MAX(charttime) AS charttime
        , MAX(spec_type_desc) AS spec_type_desc
        -- identify negative cultures as NULL organism
        -- or a specific itemid saying "NEGATIVE"
        , MAX(
            CASE WHEN org_name IS NOT NULL
                      AND org_itemid != 90856
                      AND org_name != ''
                THEN 1 ELSE 0
            END) AS positiveculture
    FROM mimiciv_hosp.microbiologyevents
    GROUP BY micro_specimen_id
)