Table 3.
Methodological quality of studies.
| Study | A | B | C | D | E | F | G | H | I | J | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Patil CS (2003) [5] |
NC | Y | NC | Y | NC | NC | NC | Y | Y | NC | 4 |
| Wang DM (2014) [6] |
Y | Y | NC | NC | NC | Y | NC | Y | Y | Y | 6 |
| Hayakawa M (2015) [7] |
NC | NC | NC | Y | NC | NC | NC | N | Y | Y | 3 |
| Sabogal- Guáqueta AM (2015) [8] |
NC | Y | NC | Y | NC | NC | NC | N | Y | Y | 4 |
| Zhang X (2016) [9] |
NC | Y | NC | Y | NC | NC | NC | N | Y | NC | 3 |
| Sun D (2016) [10] |
NC | NC | NC | Y | NC | NC | NC | NC | Y | NC | 2 |
| Moreno LCGEI (2017) [11] |
NC | Y | NC | Y | N | NC | NC | NC | Y | Y | 4 |
| Vargas-Restrepo F (2018) [12] |
Y | Y | NC | Y | NC | Y | NC | NC | Y | Y | 6 |
| Khan A (2018) [13] |
NC | N | NC | Y | N | NC | NC | Y | Y | Y | 4 |
| Rishitha N (2018) [14] |
NC | NC | NC | Y | NC | Y | NC | Y | Y | NC | 4 |
| Lu Y (2018) [15] |
NC | NC | NC | Y | NC | NC | NC | Y | Y | NC | 3 |
| Karimipur M (2019) [16] |
Y | Y | NC | Y | NC | NC | NC | Y | Y | Y | 6 |
| Paula PC (2019) [17] |
NC | Y | NC | Y | NC | NC | NC | N | Y | Y | 4 |
| Li Y (2019) [18] |
NC | NC | NC | Y | NC | Y | NC | Y | Y | Y | 5 |
Legend: A—random allocation sequence; B—similar baseline characteristics; C—allocation concealment; D—random housing; E—blinded intervention; F—random selection for outcome assessment; G—blinded assessment of outcome; H—incomplete outcome data; I—selective outcome reporting; J—other sources of bias. Y: yes; N: no; NC: unclear.