Comparison of Patient Outcomes following Implantation of Trifocal and Extended Depth of Focus Intraocular Lenses: A Systematic Review and Meta-Analysis
Table 2
The quality of the included nonrandomized controlled studies assessed with the Newcastle-Ottawa Scale.
Study
Selection
Comparability
Outcome assessment
Total quality score
Representativeness of the treatment arm
Selection of the comparative treatment arm(s)
Ascertainment of treatment regimen
Outcome was not present at the start of the study
Comparability between patients in different treatment arms: age, preoperative conditions
Assessment of outcome with independency or with records
Adequacy of follow-up duration (more than three months)
Each item can get at most one star (☆) in “selection” and “outcome assessment,” and two stars (☆☆) at most in “comparability.” The total number of stars ranges from 0 to 9; studies that score 0 to 3, 4 to 6, and 7 to 9 are considered have a low, moderate, and high quality, respectively.