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25 May 2022: Meta-Analysis

Effect of the COVID-19 Pandemic on Serum Vitamin D Levels in People Under Age 18 Years: A Systematic Review and Meta-Analysis

Xian Cui 1ABCDEF** , Yuhang Zhai 2CE* , Shuai Wang 1BF , Ke Ding 1E , Zhenya Yang 1E , Yan Tian 1D , Tingting Huo 1D

DOI: 10.12659/MSM.935823

Med Sci Monit 2022; 28:e935823

Supplementary Table 1 Quality assessment of included studies by Newcastle-Ottawa Scale.

NOS case-control StudyIs the case definition adequate?Representativeness of the casesSelection of controlsDefinition of controlsComparability of cases and controls on the basis of the design or analysisAscertainment of interventionSame method of ascertainment for cases and controlsNon-response rateTotal quality scores
Kang et al, 2020✰✰8
Feketea et al, 20217
Wong et al, 20217
Rustecka et al, 20216
Yu et al, 20206

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750