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Table 1 Newcastle–Ottawa Scale (NOS) quality assessment of the included studies. Each study was evaluated on points: the selection of study groups; the comparability of the groups; and the ascertainment of the outcomes measured. A star indicates that the study met the requirements. Each study can be awarded a maximum of nine stars

From: Global variation in isolated posterior cruciate ligament reconstruction

Newcastle–Ottawa Quality Scale ★

 

Selection

Comparability

Outcome

 

Study (Year)

Representativeness of treated cohort

Selection of comparative cohort

Ascertainment of treated cohort records

Outcome of interest was not present at start

Controls for age/sex

Controls for any additional factor

Assessment of outcome

Long enough follow-up

Adequacy of follow-up

Total Quality Score

Chen et al. (2002) [14]

★

★

★

★

★

★

★

★

★

9

Lee et al. (2013) [33]

★

★

★

★

0

0

★

★

★

7

Li et al. (2014) [37]

★

★

★

★

★

★

★

★

★

9

Li et al. (2015) [35]

★

★

★

★

★

★

★

★

★

9

Lin et al. (2013) [40]

★

★

★

★

★

★

★

★

★

9

MacGillivray et al. (2006) [42]

★

★

★

★

★

★

★

★

★

9

Ochiai et al. (2019) [49]

★

0

★

★

0

0

★

★

★

6

Rhatomy et al. (2021) [56]

★

★

★

★

★

★

★

★

★

9

Saragaglia et al. (2020) [58]

★

★

★

★

★

★

★

★

★

9

Seon et al. (2006) [63]

★

★

★

★

0

0

★

★

★

7

Song et al. (2014) [66]

★

★

★

★

★

★

★

★

★

9

Tachibana et al. (2021) [69]

★

★

★

★

★

★

★

★

★

9

Wang et al. (2004) [72]

★

★

★

★

0

★

★

★

★

8

Wong et al. (2009) [76]

★

★

★

★

0

★

★

★

★

8

Xu et al. (2014) [78]

★

★

★

★

★

★

★

★

★

9

Yang et al. (2012) [79]

★

★

★

★

★

★

★

★

★

9

Yoon et al. (2019) [80]

★

★

★

★

0

★

★

★

★

8

Zhao et al. (2007) [83]

★

★

★

★

0

★

★

★

★

8

Zhao et al. (2009) [85]

★

0

★

★

0

0

★

★

★

6