Chunk #37 — Suggested Criteria for the Assessment of Tobacco Dependence — Rationale for Included Criteria — Criteria 3 & 4: Time to first cigarette (TTFC) after waking, and usual number of cigarettes consumed per day (cpd)
There is little evidence on the relative validity of individual DSM-IV items. However, the two constructs noted above are conceptually congruent with dependence [26, 35], and rewording to make them more focused on TD (such as was done above) may enhance their validity. The wording above is just for purposes of illustration.
