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Table 2 Smoking status classification between the external questionnaire and the joint EHR sources

From: Assessing data availability and quality within an electronic health record system through external validation against an external clinical data source

 EHR smoking statusTotal
CurrentFormerNeverSmokerUnknown
External smoking statusCurrent16099168247
Former5531271500614
Never236801533643
Total2384611631,1011,504
  1. Cross-tabulation of the smoking statuses individuals reported on an unrelated questionnaire against our informatics pipeline identified smoking statuses. Current = current smoker; former = former smoker; never = never smoker; smoker = smoker temporality unknown; unknown = record did not contain enough information relating to smoking behaviors to classify. Bolded numbers are concordant for status between the EHR and external records