| Purpose: With the quick development of social economy and increasing of artificial joint replacement(AJR) cases, a new concept of bio-physico-social medical model has been accepted by common surgeons. Patients should be benifited from the improvement of quality of life, rather than physical function only. MOS 36-item Short Form Health Survey is a multipurpose, widely used short questionnaire with only 36 items. It is detailly divided into 8 scales: physical function, role-physical, body pain, general health, vitality, social function, role emotional and mental health, in order to assess the health-related quality of life. The purpose of this article is to analyze the quality of life of artificial joint replacement patients and its relevant influentical factors, and to provide consultantions for medical care of these patients.Methods: A total of 111 cases of AJR in orthopedic centre of the 88th hospital of Jinan military region were selected, with 106 cases of respondents(95%). Ages ranged 20~85 years. General health evaluation was investigated and Chinese version of SF-36 health survey was carried out. Harris score was evaluated pre- and postoperatively. Statistical evaluation included T-test, variance, Kruscal-Walis test, principal component analysis, factor analysis, correlation analysis and multiple regression analysis. SPSS 13.0 software was used for data processing.Result: 1. In the SF-36 performance test: SF-36 showed acceptable Cronbach'sαcoefficients of the eight scales and better split-half reliability and test-retest reliability. Factor analysis of the two main components of the Scale was basically the same as the original structure theory. Changes in quality of life were revealed clearly with SF-36 health survey pre- and postoperatively. 2. Comparative evaluation of the quality of life between AJR patients and normal population: all latitudes of SF-36 survey were significantly lower than those of the normal pre-operatively, while they reached close to those of the normal in BP, VT, SF and MH, higher in GH. 3. Comparison of impacting factors among different groups: no significant difference among drfferent groups in age, gender and case history. RE latitude score was 230% higher in married group than that in unmarried group. MH latitude scored higher by 52% in married group than that in widowed(divored) group. SF and MH latitude scored higher by 19% and 20% in university or higher education group than those in primary school or lower education group. PF, BP, GH, SF and RE latitude scored higher by 34%, 17%, 15%, 18% and 101% in free medical service group than those in non-free medical service group, respectively. GH, VT and MH latitude scores improved by 11%, 12% and 16% in knee joint group than those in hip joint group, respectively. GH and MH latitude scores decreased by 18% and 17% in osteoarthritis group than those in other causes group, respectively. PF and GH latitude scores in bi-lateral disorder group improved by 25% and 10% . All 8 latitude scores showed significant differences among different surgical instrument groups. It was superior in import material group than that of domestic material group. 4. Correlation factor analysis showed: economic condition and pre-operative Harris score were main influentical factors to HRQOL, they had impact on a number of latitudes in various degrees.Conclusion: 1. Chinese version of SF-36 health survey for AJR patients has advantages of acceptable reliability, validity and responsiveness. 2. Quality of life of AJR patients are lower than that of normal population in all scales pre-operatively, but improved post-operatively. 3. Assessment of the extent and degree of influence on AJR patients with conventional demographic and clinical characteristics have significant differences. Only Harris score has a good prediction(33.1%-66.2%), but it has only limited explanation for the influence on quality of life, it still needs further study on other influentical factors.
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