Traditional Chinese Medicine Zheng in the Era of Evidence-Based Medicine: A Literature Analysis
Figure 1
Annual distribution of Chinese-language articles about TCM Zheng in 3 categories (animal experimental studies, clinical studies, and pure Zheng-related studies). The data are obtained from the SinoMed database (until December 11, 2011). In the calculation, some of the annual frequencies of animal studies are 0 and 1, which are too small to be clearly shown in the column diagram. Therefore, the values are converted by the natural logarithm function “Annual Value = ln(Annual Valueorigin + 1).” Based on this function, the frequency of 0 is still 0, and the frequency of 1 (as well as other values) is ln(2).
