Table 2: Efficacy (mean AL change) and acceptability (dropout rate) in each study at 2-year follow-up.

Mean AL change (mm)Dropout rate (dropouts/total)
Treatment group Control groupTreatment group Control group

Cho et al. [16]0.29 ± 0.270.54 ± 0.278/43NA
Walline et al. [17]0.25 ± 0.27a0.57 ± 0.40a12/40NA
Kakita et al. [18]0.39 ± 0.270.61 ± 0.243/4510/60
Cho and Cheung [19]0.36 ± 0.240.63 ± 0.2614/5110/51
Hiraoka et al. [20]0.45 ± 0.210.71 ± 0.407/299/30
Santodomingo-Rubido et al. [21, 24]0.47 ± 0.20b0.69 ± 0.30b2/316/30
Charm and Cho [22]0.19 ± 0.210.51 ± 0.3214/2610/26
Chen et al. [23]0.31 ± 0.270.64 ± 0.318/4314/37

AL = axial length; NA = not available.
a used the highest sd value of other studies with the same follow-up period.
b derived from standard error in combination with GetData Graph Digitizer 2.24 (http://getdata-graph-digitizer.com/).