Efficacy and Acceptability of Orthokeratology for Slowing Myopic Progression in Children: A Systematic Review and Meta-Analysis

Table 4

NOS for cohort studies.

Study	Selection	Comparability	Outcome	Sum of score
Cho et al. [16]	●●●	●●	●●	7
Walline et al. [17]	●●●	●	●●	6
Kakita et al. [18]	●●●●	●●	●●●	9
Hiraoka et al. [20]	●●●●	●●	●●	8
Santodomingo-Rubido  et  al. [21, 24]	●●●●	●●	●●●	9
Chen et al. [23]	●●●●	●●	●●	8

NOS generates a quality score, maximum of 9 points, based on assessment of 3 study characteristics: patient selection methodology (maximum of 4 points), comparability of the study groups (maximum of 2 points), and outcomes measures (maximum of 3 points). The total score ranged from 0 (bad) to 9 (good).