Table 2.
Basic characteristics of included studies.
| Included studies | Random method | Sample (T/C) | Gender (M/F) | Age (years) | Course (months) |
|---|---|---|---|---|---|
| Huang [31] | Random number table | 30/30 | T: 14/16 | T: 65.20 ± 9.93 | T: 4.03 ± 6.34 |
| C: 13/17 | C:66.07 ± 9.68 | C: 3.90 ± 4.80 | |||
| Liu [26] | Unclear | 38/34 | T: 18/20 | T: 68.32 ± 9.74 | T: 1.58 ± 1.18 |
| C: 13/21 | C: 69.21 ± 9.21 | C: 1.53 ± 1.02 | |||
| Zhang [50] | Unclear | 63/63 | T: 35/28 | T: 62.70 ± 6.83 | T: 5.13 ± 0.81 |
| C: 34/29 | C: 62.54 ± 6.78 | C: 5.10 ± 0.79 | |||
| Deng [29] | Random number table | 43/43 | T: 31/12 | T: 55.40 ± 7.93 | T: 22.17 ± 4.44 |
| C: 28/15 | C: 21.58 ± 4.13 | C: 21.58 ± 4.13 | |||
| Zhai [30] | Computer generated random numbers | 40/40 | T: 17/23 | T: 63.7 ± 6.8 | T: 8.50 ± 3.46 |
| C: 19/21 | C: 62.4 ± 7.6 | C: 8.43 ± 4.36 | |||
| Ding [51] | Random number table | 57/58 | T: 25/32 | T: 59.33 ± 6.25 | T: 3.71 ± 0.49 |
| C: 27/31 | C: 62.45 ± 9.23 | C: 3.49 ± 0.63 | |||
| Wang H 2014 | Unclear | 21/21/21 | Unclear | Unclear | Unclear |
| Chen [27] | Unclear | 27/27 | T: 16/11 | T: 62.18 ± 7.98 | Unclear |
| C: 14/13 | C: 63.25 ± 7.49 | ||||
| Zhou YN 2018 | Random number table | 30/30 | T: 14/16 | T: 52.78 ± 8.12 | T: 6.85 ± 4.48 |
| C: 12/18 | C: 53.34 ± 7.60 | C: 6.62 ± 4.13 | |||
| Zhang [25] | Random number table | 20/20/20 | T1: 8/12 | T1: 60 ± 7 | T1: 1.62 ± 0.54 |
| /20 | T2: 13/7 | T2: 60 ± 7 | T2: 1.76 ± 0.43 | ||
| T3: 12/8 | T3: 61 ± 7 | T3: 1.59 ± 0.68 | |||
| C: 9/11 | C: 60 ± 8 | C: 1.65 ± 0.51 | |||
| Li [33] | Unclear | 30/31 | T: 13/17 | T: 53 ± 12 | T: 1.5 ± 1.1 |
| C: 14/17 | C: 56 ± 10 | C: 1.7 ± 0.9 | |||
| Liu [38] | Unclear | 31/31 | T: 14/17 | T: 59.90 ± 9.07 | T: 55.22 ± 15.01 (days) |
| C: 15/16 | C: 60.25 ± 8.79 | C: 57.58 ± 15.09 (days) | |||
| Liu B 2020 | Computer generated random numbers | 38/27 | T: 21/17 | T: 64.5 ± 3.5 | T: 4.1 ± 1.2 |
| C: 16/11 | C: 67.5 ± 3.8 | C: 3.3 ± 0.6 | |||
| Wang [35] | Random number table | 35/35 | T: 16/19 | T: 57.8 | T: 62.73 ± 10.15 (days) |
| C: 17/18 | C: 58.6 | C: 61.82 ± 9.48 (days) | |||
| Liu [37] | Order of consultation | 40/40 | T: 22/18 | T: 50.25 ± 10.17 | Unclear |
| C: 15/15 | C: 50.18 ± 10.38 | ||||
| Liu [39] | Random number table | 62/58 | T: 37/25 | T: 26.30 ± 7.66 | Unclear |
| C: 35/23 | C: 26.66 ± 7.28 | ||||
| Qing L 2019 | Random number table | 25/25 | Unclear | Unclear | Unclear |
| Tian [41] | Random number table | 34/34 | T: 14/18 | T: 61 | T: 4 |
| C: 16/16 | C:61 | C: 4 | |||
| Liu [42] | Order of consultation | 35/33 | T: 18/17 | T: 49 | Unclear |
| C: 19/14 | C: 52 | ||||
| Wang [43] | Unclear | 41/36 | Unclear | Unclear | Unclear |
| Xie YJ 2013 | Random number table | 40/40 | T: 21/19 | T: 65.3 ± 10.4 | Unclear |
| C: 18/22 | C: 65.8 ± 10.8 | ||||
| Li LP 2019 | Random number table | 30/29 | T: 16/14 | T: 59 ± 11 | T: 1.1 ± 0.15 (years) |
| C: 14/15 | C: 57 ± 13 | C: 1.2 ± 0.13 (years) | |||
| Yang [46] | Computer generated random numbers | 34/34 | T: 22/12 | T: 56.8 ± 14.9 | T: 4.9 ± 3.8 |
| C: 23/11 | C: 54.3 ± 12.4 | C: 5.6 ± 3.4 | |||
| Chen [28] | Random number table | 30/28 | T: 15/15 | T: 55.17 ± 10.88 | T: 6.23 ± 1.61 |
| C: 13/15 | C: 52.93 ± 10.4 | C: 6.41 ± 1.92 | |||
| Wang [47] | Unclear | 40/40 | T: 21/19 | T: 59.43 ± 5.27 | T: 5.73 ± 1.16 |
| C: 20/20 | C: 60.13 ± 4.29 | C: 5.98 ± 1.03 | |||
| Zhang [48] | Random number table | 45/45 | T: 12/33 | T: 48.49 ± 4.29 | Unclear |
| C: 11/34 | C: 46.39 ± 6.38 | ||||
| Zhang [23] | Random number table | 20/20/19 | T1: 5/15 | T1: 62.55 ± 7.48 | Unclear |
| T2: 9/11 | T2: 64.2 ± 10.81 | ||||
| C: 11/8 | C: 66.79 ± 11.25 | ||||
| Zhang [49] | Random number table | 31/30 | T: 16/15 | T: 61.69 ± 8.43 | T: 7.43 ± 1.49 |
| C: 17/13 | C: 61.42 ± 7.96 | C: 7.68 ± 1.52 | |||
| Lin [36] | Random number table | 32/31 | T: 12/18 | T: 54.63 ± 4.57 | T: 7.33 ± 6.24 |
| C: 13/17 | C: 54.03 ± 5.5 | C: 7.57 ± 5.89 | |||
| Zhong [52] | Random number table | 33/33 | T: 16/17 | T: 60.03 ± 3.9 | T: 3.61 ± 1 |
| C: 15/18 | C: 59.55 ± 5.36 | C: 3.58 ± 1 |
Notes. T, Treatment group; C, Control group; M, Male; F, Female.