Table 2.

Response rates and rates of biochemical verification, by follow-up assessment

3 mo6 mo12 mo
Completed follow-up assessment*123/133 (92.5%)103/119 (86.6%)84/93 (90.3%)
Provided saliva samples for cotinine assay54/123 (43.9%)16/103 (15.5%)37/84 (44.0%)
  • * Includes all patients alive at the time of the scheduled follow-up assessment and for whom the assessment was scheduled before the cutoff for data analysis.

  • Includes samples collected within 30 days of the self-report. Note that 24 patients provided samples that could not be matched to any self-report based on this criterion.