Table 4.

Newcastle-Ottawa Scale assessment of the included cohort studies

Study and Year	Newcastle-Ottawa Scale
	Selection	Comparability	Outcome	Total score
Shi et al.37 (2016)	3	2	1	6
Biener et al.38 (2015)	3	2	1	6
Manzoli et al.39 (2015)	3	2	1	6
Zhuang et al.40 (2016)	2	2	1	5
Pasquereau et al.41 (2017)	2	2	1	5
Al-Delaimy et al.42 (2015)	3	2	1	6
Kalkhoran et al.43 (2019)	2	2	1	5
Jackson et al.44 (2019)	2	2	2	6
Kalkhoran et al.45 (2019)	2	2	1	5
Wills et al.46 (2016)	2	2	2	6
Aleyan et al.47 (2017)	2	2	3	7
Goldenson et al.48 (2017)	2	2	2	6
Leventhal et al. 49 (2015)	2	2	2	6
Primack et al.50 (2015)	3	2	1	6
Barrington-Trimis et al.51 (2016)	2	2	1	5
Barrington-Trimis et al.52 (2018)	1	2	2	5
Primack et al.53 (2018)	2	2	1	5
Unger et al.54 (2016)	2	2	2	6
Hammond et al.55 (2017)	2	2	2	6
Spindle et al.56 (2017)	2	2	2	6
Miech et al.57 (2017)	2	2	1	5
Chien et al.58 (2019)	2	2	2	6
Berry et al.59 (2019)	2	2	1	5
Mcmillen et al.60 (2019)	2	2	1	5