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Table 4 Risk of bias assessment for the included cohort studiesa

From: Role of milk and dairy intake in cognitive function in older adults: a systematic review and meta-analysis

Author, Year

Representativeness of the exposed cohort

Selection of the non-exposed cohort

Ascertainment of the nutrient’s exposure

Outcome of interest absent at baseline

Control for important confounders

Adequate sample size and power

Outcome assessment

Completeness of cohort follow-up

Selective Outcome Reporting

Overall ROB

Almeida, 2006 [36]

High

Low

High

High

Low

Low

High

High

Low

High

Araki, 2017 [35]

High

Low

High

Low

Low

Unclear

High

Low

Low

Moderate

Kesse-Guyot, 2016 [32]

High

Low

Low

High

Low

Unclear

High

Low

Low

Moderate

Ozawa, 2014 [38]

Low

Low

Low

Low

Low

Unclear

Low

Low

Low

Low

Petruski-Ivleva, 2017 [33]

Low

Low

High

Low

Low

Unclear

High

Low

Low

Moderate

Vercambre, 2009 [34]

High

Low

High

High

Low

Unclear

High

High

Low

High

Yamada, 2003 [37]

High

Low

High

High

Low

Unclear

Low

Low

Low

Moderate

  1. aDetailed instructions of the modified NOS tool are presented in Additional file 1: Table S2