{
  "abstract": "Background: Dietary quality is important for preventing and managing chronic diseases in older adults; however, its association with respiratory health remains insufficiently understood. This cross-sectional study examined the association between dietary quality and lung function among older adults in South Korea. Methods: This cross-sectional study included 1021 adults aged ≥65 years from the 2024 Korea National Health and Nutrition Examination Survey. Dietary quality was measured using the Korean Healthy Eating Index (KHEI; range, 0–100). The forced expiratory volume in 1s (FEV1), forced vital capacity (FVC), FEV1/FVC ratio, forced mid-expiratory flow between 25% and 75% of FVC (FEF25–75%), and peak expiratory flow (PEF) were measured using spirometry. Linear regression models were used with beta coefficients and 95% confidence intervals (CIs). Results: The mean (standard deviation [SD]) KHEI score was 67.41 (10.97). The mean (SD) values for the lung function parameters were 2.95 (0.72) L for FVC, 2.21 (0.54) L for FEV1, 75.22 (7.68)% for the FEV1/FVC ratio, 1.93 (0.79) L/s for FEF25–75%, and 6.03 (1.73) L/s for PEF. The β (95% CI) for the relationship between the KHEI (unit = 1-SD increment) and lung function outcomes was 0.013 (−0.016–0.041) L for FVC, 0.028 (0.003–0.053) L for FEV1, 0.539 (0.129–0.950) % for the FEV1/FVC ratio, 0.057 (0.010–0.104) L/s for FEF25–75%, and 0.066 (−0.018–0.149) L/s for PEF. Conclusions: KHEI was positively associated with FEV1, FEV1/FVC, and FEF25–75%, whereas no clear associations were observed with FVC or PEF.",
  "abstract_shown": true,
  "affiliations": [
    "Graduate School, Yonsei University College of Medicine, Seoul 03722, Republic of Korea",
    "Department of Preventive Medicine, Yonsei University College of Medicine, Seoul 03722, Republic of Korea",
    "Institute for Innovation in Digital Healthcare, Yonsei University Health System, Seoul 03722, Republic of Korea",
    "The Institute for Occupational Health, Yonsei University College of Medicine, Seoul 03722, Republic of Korea"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 2,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Seong-Uk Baek",
      "orcid": "0000-0002-0882-8326"
    },
    {
      "affs": [
        1,
        2,
        3
      ],
      "name": "Jin-Ha Yoon"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/775rx4sj4mkmh.bib",
  "cited_by": 0,
  "doi": "10.3390/nu18213467",
  "fulltext_url": null,
  "id": "775rx4sj4mkmh",
  "issns": [
    "2072-6643"
  ],
  "landing_url": "https://www.mdpi.com/2072-6643/18/21/3467",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2739|Nutritional Studies and Diet"
    ]
  ],
  "openalex": "W7223201736",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": "MDPI AG",
  "ris": "https://research.draconitic.com/paper/775rx4sj4mkmh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:56Z",
      "native_id": "10.3390/nu18213467",
      "source": "crossref",
      "url": "https://www.mdpi.com/2072-6643/18/21/3467"
    }
  ],
  "subjects": [
    {
      "field": "medicine",
      "origin": "openalex:2739|Nutritional Studies and Diet",
      "subfield": "epidemiology-public-health"
    }
  ],
  "title": "Association Between Dietary Quality and Pulmonary Function Among Older Adults: Results from the Korea National Health and Nutrition Examination Survey, 2024",
  "title_text": "Association Between Dietary Quality and Pulmonary Function Among Older Adults: Results from the Korea National Health and Nutrition Examination Survey, 2024",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:19:56Z",
  "url": "https://research.draconitic.com/paper/775rx4sj4mkmh",
  "venue": "Nutrients",
  "versions": []
}