Table 5. Self-Reported Factors Influencing the Continuation of Tobacco use by Iranian Adolescents at National and sub National Levels: The Caspian-IV Study^a.

Reasons for Continuing to Smoke	Southeast	North-Northeast	West	Central	National	P Value for Trend
Reducing the anxiety	37.93	20.00	18.10	11.63	16.90	> 0.05
Increasing the attention span	27.59	14.55	18.10	18.10	15.28	> 0.05
Social acceptance by friends	20.69	21.82	18.10	19.30	19.44	> 0.05
Increasing the self-esteem	31.03	21.82	23.08	14.62	19.50	> 0.05
Feeling of pleasure	65.52	43.64	56.73	61.40	57.66	> 0.05
Having entertainment and recreation	76.67	78.18	67.62	82.46	77.01	> 0.05
Forgetting problems	41.38	18.18	22.86	16.47	20.61	> 0.05
Enjoying the tobacco smell	37.93	30.91	35.24	32.16	33.33	> 0.05
It is just a habit	43.33	30.91	29.41	29.41	30.81	> 0.05

^aValues are expressed as percentages.