Increased colorectal cancer risk in prediabetes: A meta-analysis

Table 2 Study quality evaluation via the Newcastle-Ottawa scale

Ref.	Representativeness of the exposed cohort	Selection of the non-exposed cohort	Ascertainment of exposure	Outcome not present at baseline	Control for age and sex	Control for other confounding factors	Assessment of outcome	Sufficient long follow-up duration	Adequacy of the follow-up of cohorts	Total
Jee et al[18], 2005	1	1	1	1	1	0	0	1	1	7
Rapp et al[19], 2006	1	1	1	1	1	1	0	1	1	8
Joshu et al[20], 2012	1	1	1	1	1	1	0	1	1	8
Parekh et al[21], 2013	1	1	1	1	1	1	1	1	1	9
Shin et al[22], 2014	1	1	1	1	1	1	0	0	1	7
Peila et al[23], 2020	1	1	1	1	1	1	0	1	1	8
Ke et al[25], 2021	1	1	1	1	1	0	0	1	1	7
Itoh et al[24], 2021	0	1	1	1	1	1	0	0	1	6
Campbell et al[26], 2022	1	1	1	1	1	1	0	1	1	8
Ahn et al[27], 2024	0	1	1	1	1	1	0	1	1	7
Wang et al[28], 2024	1	1	1	1	1	1	0	1	1	8