Table 1.

Quality Assessment of Studies according to New Castle–Ottawa Score

Cohort studies	Representativeness of cohort	Ascertainment of exposure	Ascertainment of outcome (functional)	Adjustment for confounder	Follow-up mentioned
Zhen et al.3) (2018)	Yes	Yes	Yes	Yes	Yes
Baghdadi et al.8) (2015)	Yes	Yes	Yes	Yes	Yes
Dutka et al.10) (2011)	Yes	Yes	Yes	Yes	Yes
Mullaji and Marawar20) (2007)	Yes	Yes	Yes	Yes	Yes
Krushell et al.15) (2008)	Yes	Yes	Yes	Yes	Yes
Baghdadi et al.2) (2013)	Yes	Yes	Yes	Yes	Yes
Hansen and Ries12) (2006)	Yes	Yes	Yes	Yes	Yes
Rosenberg et al.21) (2000)	Yes	Yes	No	Yes	Yes
Matsuno et al.18) (2000)	Yes	Yes	Yes	Yes	Yes
Gates et al.11) (1989)	Yes	Yes	No	Yes	Yes
Kondo et al.14) (2002)	Yes	Yes	Yes	Yes	Yes
Liu et al.17) (2023)	Yes	Yes	Yes	Yes	Yes
Zuh et al.23) (2015)	Yes	Yes	Yes	Yes	Yes
Yun et al.22) (2021)	Yes	Yes	Yes	Yes	Yes
Mibe et al.19) (2005)	Yes	Yes	Yes	Yes	Yes
Lee et al.16) (2022)	Yes	Yes	Yes	Yes	Yes
Figueras Coll et al.9) (2008)	Yes	Yes	Yes	Yes	Yes
Johnsson et al.13) (1984)	Yes	Yes	No	Yes	Yes