. 2022 Mar 31;9:813942. doi: 10.3389/fnut.2022.813942

TABLE 4.

Tool questions Newcastle-Ottawa.

References	1	2	3	4	5	6	7	8
Cohort studies
Chatzi et al. (21)	^*	^*	-	^*	^**	^*	^*	^*
Saunders et al. (36)	^*	^*	^*	^*	^**	^*	^*	^*
Steenweg de Graaff et al. (33)	^*	^*	-	^*	^**	-	^*	^*
Tobias et al. (37)	^*	^*	-	^*	^**	-	^*	^*
Parisi et al. (34)	^*	^*	-	-	^**	^*	^*	^*
Case-control studies
Olmedo-Requena et al. (28)	-	^*	^*	^*	^**	-	^*	^*
Martínez-Galiano et al. (30)	-	^*	^*	^*	^**	-	^*	-
Cánovas-Conesa et al. (32)	-	^*	^*	^*	^**	-	^*	^*

Items of Newcastle-Ottawa Scale for cohort studies: 1. representativeness; 2. non-exposed cohort; 3. ascertainment of exposure; 4. outcome; 5. comparability of cohorts; 6. assessment of outcome; 7. follow-up; 8. adequacy of follow-up. A maximum of one star is allocated for each domain within the “Selection” and “Outcome” categories; and a maximum of two stars is allocated for “Comparability”.