Background. Despite the adverse health consequences of smoking, many p
hysicians still neglect to counsel smokers to quit. This study evaluat
ed the effect of including smoking status as a vital sign on the frequ
ency of physician discussions with patients about smoking and physicia
n advice to quit smoking. Methods. A consecutive sample of adult ambul
atory patients in our metropolitan family practice residency program c
ompleted exit surveys on physician and nurse counseling about smoking.
Control group data were collected for 1 month before the change was m
ade to include smoking status as a vital sign on patient charts. Chart
s were then marked with a stamp as a chart prompt in the vital signs s
ection. Data were collected for 2 months after smoking status was adde
d to the stamp. Results. There were 637 individuals surveyed, of whom
179 were current smokers; 95 in the ''prestamp'' group and 84 in the '
'poststamp'' group. The percentage of patient-physician encounters dur
ing which smoking was discussed increased from 47% to 86% (P<.001). Ph
ysician advice to quit increased from 50% to 80% (P<.001). Physician d
iscussion of smoking with patients increased across all of the five st
ages of change but most dramatically (53% to 95%) in the ''preparation
'' stage. Physicians were much less likely to counsel patients in the
''precontemplation'' stage to quit smoking. Conclusions. Including smo
king as a new vital sign significantly increased the likelihood of smo
king-related discussions between patients and their physicians. The st
amp is inexpensive and easy to use, and because it is a one-time offic
e system change, it is more likely to be implemented and maintained in
busy practices.