Meta-analysis of the Efficacy of the Anatomical Center and High Hip Center Techniques in the Treatment of Adult Developmental Dysplasia of the Hip

Table 3

The included retrospective studies were assessed for quality using the Newcastle–Ottawa scale.

First author/year	Selection of population (fraction)	Comparability between groups (fraction)	Outcome measure (fraction)	Overall score (fraction)	Quality rating
Traina, 2009 [11]	4	0	1	5	Middle
Nawabi, 2014 [9]	4	0	1	5	Middle
Christodoulou, 2010 [8]	3	0	2	5	Middle
Ren, 2015 [12]	4	0	1	5	Middle
Zhu, 2017 [13]	3	2	1	6	Middle
Wang, 2018 [15]	3	2	1	6	Middle
Ge, 2021 [16]	3	2	2	7	Highness
Shen, 2021 [17]	3	2	1	6	Middle

Annotation: the full score of the Newcastle–Ottawa scale was 9 points; ≥7 was considered high-quality literature; 5-6 points was divided into medium-quality literature; <5 points was considered low-quality literature.