The life of a laboratory requisition form: Patient compliance with clinical laboratory testing in a Canadian primary care health region.

To examine patient laboratory testing compliance by tracking time to submission of laboratory requisitions in Southern Alberta, Canada as part of a quality improvement initiative. Data was collected retrospectively from patients from the Chinook Primary Care Network in Alberta, Canada, who received a laboratory requisition consisting of a complete blood count (CBC) test order between September 1, 2016 and August 31, 2017. To allow for all laboratory requisitions created to be submitted within one year, the study collection period was from September 1, 2016 to August 31, 2018. Patient age, sex, and dates of laboratory requisition creation and submission were collected. The days-to-test-submission served as a marker of compliance. Association of age, sex, and clinic location with time to laboratory requisition completion was determined using Cox regression analysis. During the study period, 70.4% (n = 1607) of laboratory requisitions created were completed within one year, and over half (50.5%) of the laboratory requisitions ordered were completed within two weeks. There were no significant associations between time to laboratory requisition submission and sex or clinic locations (P > 0.05), but there were significant associations between patients who were 20-49 or 70-79 and increased laboratory requisition compliance (P < 0.05). However, 26.0% of the laboratory requisitions created were not submitted at all. This was the first study that quantified the proportion and timing of laboratory requisitions that were submitted by patients in a primary care setting. Community patients should be engaged and educated regarding the importance of complying with their physician-ordered laboratory requests in a timely manner.

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