Review Article

Are Shiftwork and Indoor Work Related to D3 Vitamin Deficiency? A Systematic Review of Current Evidences

Table 2

Characteristics of systematic review.

First authorCountryYearMain resultAmstar score

SowaCanada2017Compared to outdoor workers, indoor workers had lower 25-hydroxyvitamin D (25-(OH)D) levels (40.6 ± 13.3 vs. 66.7 ± 16.7 nmol/L; ). Mean 25-(OH)D levels (in nmol/L) in shiftworkers, lead/smelter workers, and coalminers were 33.8 ± 10.0, 77.8 ± 5.4, and 56.6 ± 28.4, respectively9/11