|（Laboratory of Laser Sports Medicine，School of Physical Education，South China Normal University，Guangzhou 510006，China)
Abstract: By introducing quantitative difference (QD), the authors reanalyzed the original data which showed that the effect of needle or laser acupuncture therapy on chronic knee joint pain suffered by patients over 50 was not better than that on the laser sham irradiation group, found by Hinman etc. Based on the 9 evaluation indexes set by Hinman, the authors defined 9 process parameters and 33 process parameters of composite parameters, and obtained totally 102 phenotypic parameters in such two time periods as 12 weeks and 1 year, and revealed the following findings: among the statistical differences or QD which showed that the effect of the needle group, the laser group and the laser sham ir-radiation group was better than that of the control group, there were respectively 64, 22 and 39 phenotypic parameters which reached a significant level; among the QD which showed that the effect of the needle group was better than that of the laser sham irradiation group, there were respectively 29 and 10 phenotypic parameters which reached a signifi-cant level; there were 11 QD which showed that the effect of the laser sham irradiation group was better than that of the laser group. The said findings indicated that the therapeutic effect of needle, laser sham irradiation and laser on the knee joint pain of patients over 50 was better than that on the control group in the order of high to low.
Key words: sports medicine；osteoarthritis；chronic knee joint pain；acupuncture；laser；phenomics；quantitative difference