Archives of Public Health

Table 2 Quality assessment of included cohort and cross-sectional studies using the NIH quality assessment tool

From: Effect of epigenetics on vitamin D levels: a systematic review until December 2020

Author, year	1	2	3	4	5	6	7	8	9	10	11	12	13	14	Quality rating
Suderman et al., 2016	Yes	Yes	No	Yes	No	Yes	Yes	Yes	Yes	No	Yes	No	NR	Yes	Good
Beckett et al., 2016	Yes	Yes	NR	Yes	No	No	NA	No	Yes	No	Yes	No	NA	Yes	Fair
Harvey et al., 2014	Yes	Yes	NR	Yes	No	Yes	Yes	No	Yes	No	Yes	No	NR	Yes	Fair
Novakovic et al., 2021	Yes	Yes	NR	Yes	No	No	NA	Yes	Yes	No	Yes	No	NA	No	Good
Wjst et al., 2010	Yes	Yes	NR	Yes	No	No	NA	Yes	Yes	No	Yes	No	NA	Yes	Good
O’Brien et al., 2018	Yes	Yes	NR	Yes	No	Yes	NA	Yes	Yes	No	Yes	No	NA	Yes	Good

NIH: National Institute of Health, NA: not applicable, NR: not reported

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ISSN: 2049-3258

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