For the purpose of evaluationg the influence of noise exposure to the health a population, a cross sectional study was planned on the population of a district near an airport as the exposed group and the population of a provincial village as control group from August to October in 1988.
The results were as follows;
1) There was significant difference between two groups in frequency of complaints of hearing loss, tinnitus, ear fullness, tachycardia, tingling sensation, facial flushing, headache, nervousness, insomnia, anorexia, chest discomfort, dyspnea, edema.
2) There was significant difference between two groups in value of systolic blood pressure and diastolic blood pressure. But there was no significant difference in the prevalence of hypertension. 3) The degree of hearing loss according to the audible frequency was most notable in 4,000Hz.
4) There was significant differences between two groups in the degree of hearing loss at 500, 1,000, 2,000, 4,000Hz. on pure tone audiogram.
5) Age and exposure time and hearing loss were demonstrated as the variables of correlation.
6) The comparision of prevalence according to recognition methods for noise-induced hearing loss resulted in 22.7% as WHO method, 26% as 6-divided method, 22.7% as ELI applied method in exposed group.

It is a well known fact that patient satisfaction can be influenced by many factors. Factors such as personal qualities of the physician, professional competence, medical cost and convenience, availability, appointment system, doctor's response to patients' preference are important aspects and have been emphasized to have great influence in the medical service rendered.
In order to evaluate patient satisfaction of patients admitted to family practice clinics, we randomly selected 5 family practice clinics situated in Seoul and its suburbs and surveyed 138 patients with guestionnaire concerning satisfaction of care received in the family practice clinic and other special clinics previously visited.
Of the total 138 patients evaluated, the 20-29 years of age group was most common totaling 55(39.9%). The number of males was 52(38.2%) and that of females was 84(61.8%).
Mean number of visits less than 5 visits per year was most common numbering 71(54.6%). 72.4% of patients had other family members treated at the family practice clinic. The average number of treatments for other family members was 2 visits. 79.0% of patients was never referred or consulted to other special medical clinics, but 18.8% reponded that they had been referred or consulted to other specialists during their time of treatment. 86.2% never made appointments for their visits. 49.6% of patients utilized the phone services nd only 38.8% felt the need of home visits.
There was significant differences of patient satisfaction regarding their care received between family practice clinics and other special medical clinics. All aspects of medical care influencing patient satisfaction in family practice clinics were evaluated to be better than that of the other special medical clinics. Patients were more satisfied in the care received having higher scores of satisfaction using Likert scale.
Patients with high income, higher education, and had small number of family members (less than2) or rather large number(more than 6) more or less approved of the necessity for home visits by doctors. Patients with high income were more satisfied in the preventive measures such as screening procedures and consultation regarding prevention being done at the family practice clinics. Patients whose family members consisted of less than 2 or more than 6 were more satisfied regarding the use of referral or consultation requested by family physicians.
For the betterment of medical care services, family physicians should recognized the factors influencing satisfactions of patients and acquire knowledge and skills to improve situations surrounding medical community.

HBs Ag and Anti-HBs Tests among serologic markers of Hepatitis B virus were used as testing criteria for 2130 students who took the regular health examination at Yonsei University, which was held twice from October 1987 to May 1988.
1. The HBs Ag was detected in 119 out of 2130 students with a positive rate of 5.59%. Of them, the healthy carriers, who had a normal L.F.T.(OT, PT), were 94 students, and 25 students had an OT, PT higher than 30 IU/ml.
2. The positivity of the Anti-HBs was 13.62%, they therefore had immunity.
3. After three HB vaccinations, 173 out of 217 students showed positivity to the Anti-HBs(79.7%).
4. There was no valid statistic difference between the two groups in the RIA test ; one group had the Hepavax injection, the other group had Hepaccine.
In Conclusion, it is economical to execute the RPHA test which detects HBs Ag with a screening test, before the HB vaccination, Anti-HBs can be testec in a PHA test first. When the response is negative, Anti-HBs of the serum from those who showd a negative response could be measured in an RIA test.