Comparison between Minimally Invasive Plate Osteosynthesis and Conventional Open Plating for Midshaft Clavicle Fractures: A Systematic Review and Meta-Analysis

Table 1

Quality assessment of nonrandomized studies (methodological index for nonrandomized studies).

	Beirer 2015 [19]	Sohn 2015 [13]	You 2018 [21]	Zehir 2018 [22]	You 2019 [23]
A clearly stated aim	2	2	2	2	2
Inclusion of consecutive patients	2	2	2	2	2
Prospective data collection	2	0	2	0	0
End points appropriate to the aim of the study	1	2	2	2	2
Unbiased assessment of the study end point	0	0	0	0	0
A follow-up period appropriate to the aims of study	1	2	2	2	2
Less than 5% loss to follow-up	2	2	2	0	2
Prospective calculation of the sample size	0	0	0	0	0
An adequate control group	2	2	2	2	2
Contemporary groups	2	2	2	2	2
Baseline equivalence of groups	2	2	2	2	2
Adequate statistical analyses	2	2	2	2	2
Total score	18	18	20	16	18

The items are scored 0 (not reported), 1 (reported but inadequate), or 2 (reported and adequate).