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Table 1 Two-by-two table of tobacco use status by missing for self-report data

From: Analysis of self-report and biochemically verified tobacco abstinence outcomes with missing data: a sensitivity analysis using two-stage imputation

  Self-report tobacco use status  
Missing status of self-report data Abstinence Failure Total
Observed n 11 n 12 n 1.
Missing n 21 n 22 n 2.
Total n .1 n .2 n
  1. Bolded entries indicate values that are not observable