Table 1.
Baseline characteristics of included studies.
| References | Publish types | nTotal | nMD | Grades | Screening approaches | Sample characteristics | |||
|---|---|---|---|---|---|---|---|---|---|
| Tools | Cut-off point | Teacher participation | Sex ratio | Comorbidity | |||||
| Cai et al. (26) | J | 380 | 55 | U | S | 0.20 | No | 1.00 | No |
| Ding et al. (27) | J | 183 | 32 | M | C | 0.25 | No | No report | No |
| Lin et al. (28) | J | 237 | 82 | M | C | 0.25 | No | No report | No |
| Huang and Chen (22) | J | 805 | 38 | M | C | 0.25 | No | 1.05 | Yes |
| Wang (29) | J | 1,160 | 30 | M | C | 0.20 | No | 1.53 | Yes |
| Zhang (30) | J | 1,148 | 54 | M | S | 0.20 | Yes | 1.50 | No |
| Cai (31) | D | 260 | 20 | L | S | 0.20 | Yes | 1.45 | No |
| Chen et al. (32) | J | 300 | 32 | L | S | 0.25 | Yes | 2.33 | No |
| Chen et al. (33) | J | 600 | 60 | U | S | 0.20 | Yes | 1.00 | No |
| Cheng and Gong (34) | J | 1,564 | 66 | M | S | 0.12 | Yes | No report | Yes |
| Du (35) | D | 866 | 34 | M | S | 0.32 | Yes | 1.13 | No |
| Han et al. (36) | J | 450 | 84 | L | S | 0.25 | No | 1.71 | No |
| He (37) | D | 417 | 14 | U | C | 0.19 | Yes | 1.00 | No |
| Jiao (38) | D | 218 | 45 | M | S | 0.20 | Yes | 0.73 | No |
| Lai et al. (39) | J | 1,147 | 229 | M | S | 0.25 | No | No report | No |
| Li (40) | D | 1,177 | 97 | U | S | 0.10 | Yes | No report | No |
| Li (41) | D | 1,600 | 80 | L | S | 0.25 | Yes | 1.16 | No |
| Li et al. (20) | J | 2,057 | 100 | M | C | 0.00 | No | 1.44 | No |
| Liu (42) | D | 268 | 56 | L | S | 0.25 | No | 1.33 | No |
| Liu (43) | D | 1,083 | 36 | M | S | 0.12 | Yes | 1.40 | No |
| Liu (44) | D | 151 | 42 | M | S | 0.19 | Yes | 1.43 | No |
| Liu and Cai (45) | J | 160 | 39 | M | S | 0.20 | No | 0.93 | No |
| Liu (46) | J | 576 | 28 | M | S | 0.25 | Yes | No report | No |
| Shang (47) | D | 257 | 66 | M | S | 0.25 | Yes | No report | No |
| Shi (48) | D | 51 | 14 | L | C | 0.25 | No | 1.00 | No |
| Tang (49) | D | 417 | 14 | U | S | 0.12 | Yes | 1.00 | No |
| Wan et al. (50) | J | 350 | 57 | M | S | 0.25 | Yes | 0.90 | Yes |
| Wang (51) | D | 324 | 83 | L | C | 0.30 | No | No report | No |
| Wang (52) | D | 1,092 | 21 | U | S | 0.12 | Yes | 2.47 | Yes |
| Wang (53) | D | 210 | 33 | L | S | 0.25 | Yes | 1.20 | No |
| Wang (54) | D | 300 | 180 | M | S | 0.25 | Yes | No report | Yes |
| Wang et al. (55) | J | 87 | 45 | M | S | 0.30 | Yes | No report | No |
| Wang (56) | D | 810 | 15 | M | S | 0.25 | Yes | 2.57 | No |
| Wu et al. (57) | J | 703 | 48 | M | S | 0.10 | No | 0.92 | No |
| Xiao (58) | D | 325 | 24 | M | S | 0.20 | Yes | No report | No |
| Xing et al. (59) | J | 214 | 48 | L | S | 0.30 | Yes | 1.29 | No |
| Xu (60) | D | 530 | 24 | L | S | 0.15 | No | 1.00 | No |
| Xu (61) | D | 1,282 | 14 | U | S | 0.10 | No | 1.00 | No |
| Xu (62) | D | 408 | 30 | M | S | 0.12 | Yes | No report | No |
| Xu (63) | D | 128 | 20 | M | S | 0.20 | Yes | No report | No |
| Xu (64) | D | 408 | 38 | L | S | 0.12 | Yes | No report | Yes |
| Yang et al. (7) | J | 657 | 40 | U | S | 0.25 | Yes | 1.25 | No |
| Ye (65) | D | 1,224 | 74 | L | S | 0.25 | Yes | 0.68 | No |
| Zhang (66) | D | 294 | 49 | M | S | 0.10 | Yes | 1.42 | No |
| Zhang et al. (8) | J | 1,696 | 141 | M | C | 0.25 | No | 2.00 | Yes |
| Zhang et al. (12) | J | 411 | 19 | L | C | 0.25 | No | 0.73 | No |
| Zhang and Zhang (67) | J | 330 | 30 | M | S | 0.25 | Yes | 1.31 | No |
| Zhang (68) | D | 479 | 30 | M | S | 0.10 | Yes | 1.00 | No |
| Zhang et al. (69) | J | 2,364 | 46 | M | S | 0.10 | Yes | 1.56 | No |
| Zhang (70) | D | 381 | 20 | U | S | 0.10 | Yes | 1.00 | No |
| Zhou (71) | J | 407 | 17 | U | S | 0.19 | No | 0.23 | No |
| Zhou (72) | D | 827 | 42 | U | S | 0.10 | Yes | 0.83 | No |
| Zhu and Wang (73) | J | 700 | 16 | M | S | 0.25 | Yes | 1.82 | Yes |
| Zuo (74) | D | 342 | 76 | M | S | 0.20 | Yes | 1.62 | No |
J, journal articles; D, dissertation; L, lower grades of primary school; M, middle grades of primary school; U, upper grades of primary school; Tools, Math ability test tools; C, Chinese version of tools; S, middle/end of semester at school level or above; Teacher participation, whether teacher participation; Comorbidity, whether MD comorbidity with RD; RD, reading difficulties.