The nutrition literacy assessment instrument for Italian subjects, NLit-IT: Exploring validity and reliability

Virginia Vettori, Chiara Lorini, Heather D. Gibbs, Francesco Sofi, Vieri Lastrucci, Gino Sartor, Ilaria Fulvi, Duccio Giorgetti, Giuseppe Cavallo, Guglielmo Bonaccorsi

Research output: Contribution to journalArticlepeer-review


The aim of this study was to test validity and reliability of the adapted version of the Nutrition Literacy Assessment Instrument (NLit) for Italian people (NLit-IT). An observational cross-sectional study was conducted, involving a convenience sample of adults (n = 74). To explore the validity of the tool, we considered both diet quality as an outcome of NL, and health literacy (HL) as a construct that presents similarities and differences with NL. Diet quality was measured by adherence to the Mediterranean Diet (Med diet) through the validated Mediterranean Diet Literature-based adherence score (MEDI-Lite). The relationship between NL level and adherence to Med diet was assessed by linear regression analysis and computing correlations between NLit-IT and MEDI-Lite scores (Spearman’s Rho). Additionally, we evaluated the correlation between NLit-IT score and the level of HL (Spearman’s Rho). Internal consistency and reliability were measured by Cronbach’s alpha and intraclass correlation coefficient (ICC) respectively. Internal consistency (ρT = 0.78; 95% CI, 0.69–0.84) and reliability (ICC = 0.68, 95% CI, 0.46–0.85) were confirmed. In addition, NLit-IT total score was correlated with MEDI-Lite score (Rho = 0.25; p-value = 0.031) and multivariate regression analysis confirmed that NL significantly contributed to MEDI-Lite score (R2 = 0.13; β = 0.13; p-value = 0.008). There was no significant association between the level of HL and NL. In conclusion, NLit-IT showed validity and reliability as a measure of NL for Italian people.

Original languageEnglish
Article number3562
JournalInternational Journal of Environmental Research and Public Health
Issue number7
Publication statusPublished - Apr 1 2021


  • Cross cultural adaptation
  • Dietetics
  • Food appearance
  • Food literacy
  • Food security
  • Malnutrition
  • Misinformation
  • Nutritional literacy
  • Obesity

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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