Background
: Nowadays the addictive use of internet is becoming a serious social and health problem. The authors performed a study in PC bang users to evaluate the prevalence of addictive internet use and the association between addictive internet use and behavioral and psychological factors.

Methods : A face-to-face interview survey of 900 Korean internet users at six PC-bangs was performed between 11th and 19th of December, 2002, using standardized questionnaires composed of Young's internet addiction scale, scale of unwillingness to communicate, patient problem questionnaire for screening depression and anxiety, and questions asking internet using patterns and socio- demographic factors.

Results : Of the final 888 participants, 3.4% were identified as addictive users and 41.3% as over-users of internet service. The subjects who were male, unemployed, less educated, using internet mainly at PC bang, using internet more frequently, starting or finishing off internet use usually in the morning, using internet service usually for doing games tended to be more addictive users of internet (P＜0.05). In proportional odds model analysis, increasing duration of internet use (OR=1.22; 95% CI, 1.16∼1.30), daily use of internet (OR=2.06; 95% CI, 1.21∼3.51), finishing off internet use between midnight and 6 a.m. (OR=2.00; 95% CI, 1.30∼3.07), anxiety (OR=5.38; 95% CI, 2.86∼10.1), and increasing approach avoidance (OR=1.05; 95% CI, 1.03∼1.08) were significantly associated with a higher degree of internet addiction.

Conclusion : Addictive use of internet should be suspected in a person who uses internet for long time, daily, and over midnight. An active evaluation and management for anxiety are needed among addictive internet users.

Background
: This study was done to examine the relationship between distorted self-perception of body weight and some sociodemographic factors in Korean adults.

Methods : This study was conducted among 14,621 adults (men 10,833, women 3,788), who visited Ulsan University Hospital Health Promotion Center to take a routine health examination. The objective body weight status was classified as underweight, normal, overweight, and obesity by body mass index. We compared the self- perception of body weight with in objective body weight status. We used multiple logistic regression to assess the odds ratio for distorted self-perception of body weight by age, marital status, monthly income, and level of education.

Results : Among the total 72.8% of obese men had a distorted self-perception of being slightly excess, 48% of overweight men considered themselves as just about right, and 39.5% of men with normal body weight as underweight. In women, 36.5% with normal body weight had a distorted self-perception of being slightly excess or very excess. In both men and women who were overweight or obesity, the distorted self-perception of being just about right was increased with higher age and lower education. The odds ratio of distorted self-perception in normal as being slightly excess or very excess was higher in women with higher income and higher education.

Conclusion : In both men and women, many people had a distorted self-perception of Body weight. Some sociodemographic factors were found to be related to the self- perception of body weight.

Background
: Many countries have been legally prescribing health warning messages on cigarette packages as a part of their national policy of smoking cessation. This study was designed to evaluate the effectiveness for smoking cessation of graphic health warning labels, and compare them with the existing health warning messages.

Methods : From February to December 2002, we surveyed 103 smokers who were college students of fine arts. After letfing them see the graphic health warning labels, the self recorded questionnaires were collected.

Results : The effectiveness for the smoking cessation of the existing health warning messages was evaluated low, despite its wide recognition. But there was no difference between the visual effect and the effectiveness for the smoking cessation of the graphic health warning labels. The graphic health warning labels were more effective for the smoking cessation than the existing health warning messages, and it was the same in the subgroup analysis such as sex, degree of recognition of disease, and non- smoking planning.

Conclusion : To quit smoking, it is reasonably concluded that the graphic health warning labels on cigarette packages was very effective. Hereafter, it is recommended more useful designs of graphic health warning labels be developed.

Dry mouth is a common symptom in over middle- aged women. Xerostomia itself can be caused by multifactorial etiolgy. Dry mouth may occur with the use of medications, as a complication of connective tissue and autoimmune disease, such as Sjogren's syndrome or sicca syndrome, with radiation therapy to the head and neck or diabetes mellitus, or with a number of other condition. Even stress and anxiety can lead to a dry mouth. Also, Abnormal liver function is associated with drugs, viral infection, alcohol, obesity, autoimmne disease and a number of other disease. A 41-year-old women complaining of xerostomia and known abnormal liver fuction since 1 year was admitted to our medical examination center. In this case, Final diagnosis was systemic lupus erythematosus with autoimmune hepatitis and secondary Sjogren's syndrome through characteristic clinical finding, liver biopsy, positive Schirmer's test, salivary gland biopsy, and salivary scintigraphy. The various immunosuppresant medication has taken and then liver function indices and clinical symptoms were improved.