3.2  |  Basic characteristics of the included literature and quality evaluation results
Six randomized controlled trials were included14-19 Of these, three were in patients with breast cancer chemotherapy16, 18, 19, one in patients with breast cancer radiotherapy15, and one in patients with metastatic breast cancer17. Of these, all studies had comparable baseline information, three reported methods of allocation concealment, and five described sample attrition. The results of this literature quality assessment showed that 115 quality grade of A and the remaining 514, 16-19quality grade of B. The overall quality of the literature was moderate. The basic characteristics of the included literature are shown in Table 1, and the evaluation of literature quality is shown in Figure 2.
Table 1 Characteristics of the included studies (n=6)