NHANES Dietary Antioxidant Index and Mortality in Psoriasis Patients, 2003-2014

Data from the U.S. National Health and Nutrition Examination Survey (NHANES) from 2003-2006 and 2009-2014 was used to investigate the association between the Composite Dietary Antioxidant Index (CDAI) and all-cause mortality in 500 individuals with psoriasis. The study, authored by Xuan Li and published on figshare, linked higher CDAI levels to a lower risk of death, with 61 deaths recorded during follow-up. The dataset is licensed under CC-BY-4.0 and was last updated on April 14, 2026.

Use Cases

• Analyze the association between dietary antioxidant intake and mortality risk based on the Composite Dietary Antioxidant Index (CDAI) variable.
• Conduct subgroup analyses on mortality in psoriasis patients based on demographic or health factors mentioned in the study.
• Validate the findings of the original research using the underlying NHANES and mortality data.
• Model survival outcomes for chronic disease patients based on nutritional indices.

Strengths

• Data is derived from the authoritative NHANES survey, a major U.S. public health resource.
• Mortality data is linked from the National Death Index (NDI) database.
• The study includes 500 patients with psoriasis and tracks 61 mortality events.
• Results are supported by multivariate Cox regression and sensitivity analyses.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count for the underlying analytical dataset is unknown, which may limit suitability assessment.
• The dataset file is a 13.5 KB DOCX, suggesting it contains summary results rather than the full raw data.

Provenance

Source

National Health and Nutrition Examination Survey (NHANES) and National Death Index (NDI).

Collection Method

Data extraction from NHANES cycles and linkage to NDI mortality records, analyzed using Cox proportional hazard models.

Time Range

2003-2006 and 2009-2014 (survey data).

Freshness

Last updated 2026-04-14 04:19:47; freshness should be verified.

Geography

United States.