smoking is a key modifiable risk factor that greatly increases the likelihood of 2 dying young from cancer, heart disease, and lung disorders The World Health Organization (WHO) reports that 3 tobacco products are used by one-third of the world's population, and that 90% of tobacco users began using 4 them before the age of 18.

The majority of smokers make multiple unsuccessful attempts to stop 5 smoking before attaining long-term abstinence, with over half of these attempts culminating in a relapse. 6 Healthcare professionals are essential in helping people stop smoking. According to professional guidelines and 7 the World Health Organization (WHO), doctors should actively encourage smokers to give up. Aim of this work 8 was to explore the knowledge, attitude and practice of resident physicians about smoking cessation program and 9 the effect of their smoking habits on smoking cessation advice for patients.

Inclusion Criteria:

• whole total resident physicians number at Mansoura university hospital in 2023

Exclusion Criteria:

• refuse to share or had a vacation from work

This study included the whole total resident physicians number at Mansoura university hospital in 2023