What type of study is this?

This is a Case-Control Study study.

November 8, 2025Open Access

Association of nutritional related biochemical markers with COVID-19 infection: a case-control study

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Case-control analysis reveals associations of nutritional indicators with COVID-19 infection risk, suggesting early screening may improve outcomes.

COVID-19 infection risk is associated with lower serum vitamin D and potassium levels, impacting patient outcomes.
Median serum CRP was significantly elevated in COVID-19 patients at 60.5 mg/L, highlighting inflammatory factors.
Statistical analysis utilized SPSS to assess relationships between nutritional and hematological markers and COVID-19 risk.
Implications point to the need for early biomarker assessment to potentially reduce the risk of COVID-19.

Khajebishak et al. (2025) studied this question.

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Case-control analysis reveals associations of nutritional indicators with COVID-19 infection risk, suggesting early screening may improve outcomes.