Objectives: Survey of the characteristics of tongue in patients with knee pain due to knee osteoarthritis.
Subject and methods: The cross-sectional study was conducted on 391 patients with knee pain due to knee osteoarthritis. Tongue images were taken on these patients, then analyzed by automatic tongue diagnosis system ZMT-1A at the office of Department of Basic Traditional Medicine, Faculty of Traditional Medicine, University of Medicine and Pharmacy at Ho Chi Minh City.
Results: The main characteristics of tongue-body color are a dark-purple tongue (58.3%) and, a thin tongue (50.6%). In terms of coating tongue, little/no coating accounted for 74.2%, white coating 31.5%, and wet coating accounted for 47.6%. The difference of tongue-body shape and tongue with blood stasis between pain levels (VAS) are statistically significant (p<0.05).
Conclusion: The dark-purple tongue, little/no coating, thin tongue, with little/no coating, white coating, wet coating is common in patients with knee pain due to knee osteoarthritis. In addition, the prickles tongue, tongue with blood stasis are difference between pain levels (VAS).