Background
: Until recently, the study of knowledge and practice rate of adult immunization is insufficient. The aim of this study is to provide reference data about adult immunization for primary physician.

Methods : We assessed 258 out-patients and their caregivers who visited 3 local clinics in Seoul and near-Seoul area, and completed questionnaires given from June to August, 1993. Vaccine-preventable diseases using this study are tetanus, rubella, hepatitis B, influenza and pneumoccoccal pneumonia. The immunization schedule of each diseases insisted briefly to subjects before answering questionnaires.

Results : Among 258 cases, male subjects were 104 in number(40.3%), and female were 154(59.7%). The mean age was 33.9 years. The subjects answered that the most useful method of knowing names of vaccine-preventable diseases was mass-communication(72.9%). About tetanus booster immunization for adult, the cognition rate was mass-communication (72.9%). About tetanus booster immunization for adult, the cognition rate was 16.7% and the performance rate qas 2.3%. The number of female in reproductive ages between 15 and 49 years was 140. Among them, the cognition rate of rubella immunization was 25.7% and the performance rate was 39.3%. About hepatitis B, the cognition rate was 95.0% and the performance rate was 58.9%(P<.0001). The number of those aged 65 years or more was 9, and they all did not know and not perform influenza or pneumococcal pneumonia immunization.

Conclusion : With all disease entities of adult immunization except hepatitis B, the cognition and performance rates were revealed low. 84.7% of all subjects answered that adult immunization is necessary.

Background
: It is important in heaith examination to select the kinds of target diseases and screening tests in the respect of cost-benefit effect. Therefore we carried out this study to aid selection of target diseases and screening tests.

Methods : We reviewed questionnaires for medical history, medical charts and screening test results of 832 adults who visited outpatient department of family medicine for the purpose of health examination from April, 1991 to March, 1993. We selected 576 adults who had not suffered from chronic diseases.

Results : The selected subjects were composed of 300 males (52.1%) and 276 females(47.9%). The screening tests which showed high positive rates were upper gastrointestinal series/Gastrofiberscopy(27.1%), blood pressure measurement(20.3%), abdominal ultrasonography(16.9%), urine microscopic examination(13.0%), chest X-ray(12.5%). The detection rates of target diseases were 25%(144 subjects) in all, 22.7% in males, and 27.5% in females. The 4 most common target diseases were hypercholesterolemia(8.0%), anemia(7.5%) liver disease(5.0%), and hypertension(4.2%). Among males, higher detection rate of liver disease were seen in the 3rd and 4th decades : liver disease and hypercholesterolemia in the 5th decade. Males older than 50 years of age had higher rate of hypercholesterolemia, hypertension, and anemia. Among females, higher detection rate of anemia were seen in the 3rd and 4th decades ; anemia, hypercholesterolemia and HBsAg(+) in the 5th decade. Females older than 50 years of age had higher rate of hypercholesterolemia, hypertension, and anemia.

Conclusion : Target diseases in health examination were observed in 25% of selected subjects. The detection rate of target diseases were significantly different according to age and sex.