TY - JOUR T1 - Measurement and definition for smoking cessation intervention research: the Smoke-Free Families experience JF - Tobacco Control JO - Tob Control SP - iii87 LP - iii90 DO - 10.1136/tc.9.suppl_3.iii87 VL - 9 IS - suppl 3 AU - Cathy L Melvin AU - Pattie Tucker AU - the Smoke-Free Families Common Evaluation Measures for Pregnancy and Smoking Cessation Projects Working Group Y1 - 2000/09/01 UR - http://tobaccocontrol.bmj.com/content/9/suppl_3/iii87.abstract N2 - The measures, definitions, and processes used in the Smoke-Free Families clinical trials to assure consistent measurement and reporting of various aspects of the trials are described. Definitions of current smokers at different points in the pregnancy, levels of addiction, biological verification, cessation, stages of change, and intervention approaches are presented along with the rationale underlying their adoption and development. ER -