Worldwide Research Trends on Diabetic Foot Ulcers (2004–2020): Suggestions for Researchers

Figure 9

Cooccurrence analysis on DFU research. (a) Mapping of keywords on DFU research; the size of nodes represents the frequency, while the lines between nodes reflect the cooccurrence relationship. A total of 1000 included keywords were divided into five clusters: rehabilitation study (green), surgery study (sea blue), complication study (dark blue), molecular mechanism study (red), and clinical study (purple). (b) Distribution of keywords according to the frequency of appearance. The colour blue indicates the keywords appear earlier, whereas the colour yellow reflects the later occurrence.

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