Table 4. Nicotine dependence rate.

	n	95% CI	P
Total	222 (43.2%)	36.7–49.7
Sex			0.037
Male	194 (45.9%)	38.9–52.9
Female	28 (25.0%)	9.0–41.0
Age (years)			0.002
21–24	164 (37.2%)	29.8–44.6
25–29	49 (65.3%)	52.0–78.6
30–	9 (33.3%)	2.5–64.1
Type of university			0.030
National/public	127 (37.0%)	28.5–45.5
Private	95 (51.6%)	41.6–61.6

Data were collected from December 2006 through March 2007.

We used 8 items from the Japanese-language version of the Fagerstrom Tolerance Questionnaire; dependence was defined as a score of ≥4 points.