Diagnostic accuracy of the PG-SGA short form and NRS 2002 in internal medicine ward

João Pedro Pinho, Ricardo Marinho, Joana Silveira, Sandra Gomes Silva, Ana Almado, A. Pessoa, J. Rosinhas, Marta Lopes, Faith D. Ottery, Harriët Jager-Wittenaar, Anibal Marinho

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Abstract

Rationale: The PG-SGA is a validated instrument to assess malnutrition and its risk factors. Its patient component, i.e. the PG-SGA Short Form (SF), can be used as screening instrument. In this multicenter study, we aimed to assess diagnostic accuracy of the PG-SGA SF and NRS 2002, in patients at the Internal Medicine ward.Methods: In 192 patients (76.0±13.5 years; 53% female) in 9 Portuguese internal medicine wards, malnutrition risk was assessed by PG-SGA SF and NRS 2002. PG-SGA SF ≤8 was defined as low/medium malnutrition risk and NRS 2002 ≤2 as low risk. PG-SGA SF ≥9 and NRS 2002 ≥3 were defined as high malnutrition risk. Nutritional status was assessed by the full PG-SGA (reference method). Malnutrition was defined as PG-SGA Stage B (moderate/suspected malnutrition) or Stage C (severely malnourished). Diagnostic accuracy was tested by sensitivity, specificity, positive and negative predictive value, and receiver operating curve. Agreement between PG-SGA and NRS-2002 was tested by McNemar’s test and Cohen’s kappa (κ).Results: Forty-six % and 53% were categorized as at risk of malnutrition by PG-SGA SF and NRS 2002, respectively. In total, 55% were malnourished. Sensitivity, specificity, positive and negative predictive value of PG-SGA SF and NRS 2002 were 0.84, 1.00, 1.00, 0.83 and 0.74, 0.74, 0.77 and 0.70, respectively. Area under curve of PG-SGA SF and NRS 2002 was 0.987 and 0.778 respectively. McNemar’s test showed no significant disagreement (p=0.86) between PG-SGA SF and NRS 2002. Cohen’s kappa showed weak agreement (κ=0.492; p<0.001) (Table 1).Conclusion: Our findings indicate that in patients at the internal medicine ward, PG-SGA SF shows better diagnostic accuracy than NRS 2002, i.e. better sensitivity and specificity.
Original languageEnglish
Publication statusPublished - Aug 2017
EventESPEN - The Hague, Netherlands
Duration: 9 Sep 201712 Sep 2017

Conference

ConferenceESPEN
CountryNetherlands
CityThe Hague
Period9/09/1712/09/17

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Keywords

  • malnutrition
  • diagnosis

Cite this

Pinho, J. P., Marinho, R., Silveira, J., Gomes Silva, S., Almado, A., Pessoa, A., ... Marinho, A. (2017). Diagnostic accuracy of the PG-SGA short form and NRS 2002 in internal medicine ward. Abstract from ESPEN, The Hague, Netherlands.