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. 2020 Mar 14;20:56. doi: 10.1186/s12911-020-1068-5

Table 3.

Comparison of the pattern-matching algorithm classification to data review

Data Review (reference standard)
Current Never Not Current Past Unknown Conflicting Information Not Smoking-related Accuracy (%)
Pattern-Matching Algorithm Current 23,858 5 243 298 1562 2688 28 83.2
Never 0 53,211 32 49 1 274 0 99.3
Not Current 0 0 2696 2 284 0 0 90.4
Past 2 1 1 21,691 2 6 0 99.9
Unknown 236 13 819 282 2479 20 67 63.3