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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
External smoking statusCurrent16099168247
  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