Table 1.
Characteristics and quality scoring components of included studies
| Trial, year | Study design | Location | Number of eyes | Quality score component | Overall effect | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| I | II | III | IV | V | Overall | Percentage | ||||
| Ikuno (2003) [14] | Retrospective, nonrandomized, comparative study | Japan | 14/2 | 8 | 2 | 3 | 3 | 0 | 16 | 50.00 % |
| Lam (2006) [15] | Retrospective, interventional, comparative case series | China | 44/13 | 9 | 2 | 2 | 3 | 2 | 18 | 56.25 % |
| Li KK (2010) [17] | Prospective interventional, comparative, case control study | China | 10/9 | 10 | 2 | 3 | 2 | 0 | 17 | 53.13 % |
| Li X (2009) [9] | Prospective, randomized controlled, multicenter study | China | 65/46 | 10 | 2 | 4 | 2 | 3 | 21 | 65.63 % |
| Nakanishi (2008) [10] | Retrospective, multicenter, interventional case series | Japan | 40/9 | 9 | 2 | 2 | 2 | 2 | 17 | 53.13 % |
| Uemoto (2004) [18] | Retrospective, nonrandomized, comparative study | Japan | 13/12 | 10 | 2 | 3 | 3 | 0 | 18 | 56.25 % |
| Wei (2013) [16] | Retrospective, comparative, case control study | China | 47/49 | 10 | 2 | 3 | 3 | 2 | 20 | 62.50 % |