Table 2: PEDro scale of quality for included trials.

Study Eligibility criteria Random allocation Concealed allocation Similar at baseline Subjects blinded Therapists blinded Assessors blinded <15% dropouts Intention-to-treat analysis Between-group comparisons Point measures and variability data Total Liang [13] 1 1 0 1 0 0 0 1 1 1 1 6 Pang et al. [20] 1 1 0 1 0 0 0 1 1 1 1 6 Chen et al. [21] 1 1 0 1 0 0 0 1 1 1 1 6 Huang [14] 1 1 0 1 0 0 0 1 1 1 1 6 Liu et al. [22] 1 1 0 1 0 0 0 1 1 1 1 6 Su and Lei [15] 1 1 0 1 0 0 0 1 1 1 1 6 Zhou [30] 1 1 0 1 0 0 0 1 1 1 1 6 Cai [16] 1 1 0 1 0 0 0 1 1 1 1 6 He et al. [23] 1 1 1 1 0 0 1 1 1 1 1 8 Liu [29] 1 1 0 1 0 0 0 1 1 1 1 6 Rong [27] 1 1 0 1 0 0 0 1 1 1 1 6 Wen [17] 1 1 0 1 0 0 0 1 1 1 1 6 Yuan et al. [28] 1 1 1 1 0 0 0 1 1 1 1 7 Ke and Li [24] 1 0 0 1 0 0 0 1 1 1 1 5 Wang et al. [31] 1 1 0 1 0 0 0 1 1 1 1 6 Yang et al. [25] 0 1 0 1 0 0 0 1 1 1 1 6 Zhang et al. [18] 1 1 0 1 0 0 0 1 1 1 1 6 Chen [32] 1 1 0 1 0 0 0 1 1 1 1 6 You and Zhou [19] 0 1 0 1 0 0 0 1 1 1 1 6 Zeng [26] 1 0 0 1 0 0 0 1 1 1 1 5

0: does not meet the criteria; 1: meets the criteria.