Índice frágil-VIG: Validez convergente y discriminativa respecto a la Short Physical Performance Battery en población general / Frail-VIG index: Convergent and discriminatory validity with respect to Short Physical Performance Battery in general population

Antecedentes y objetivo: El estudio de la fragilidad en atención primaria (AP) mediante índices de fragilidad (IF) es escaso. El índice frágil-VIG evalúa el grado de fragilidad con un enfoque multidimensional. El objetivo principal fue investigar la validez convergente y discriminativa del índice frágil-VIG respecto a la Short Physical Performance Battery (SPPB) en población general ≥ 70 años. Población, materiales y métodos: Estudio descriptivo transversal. Se incluyeron 416 participantes no institucionalizados ≥ 70 años de dos cupos de un centro de salud semiurbano. Las variables principales fueron el índice frágil-VIG y la SPPB. Resultados: El valor bajo la curva ROC del índice frágil-VIG respecto a la SPPB < 7 fue de 0,81 (IC 95% 0,76-0,86). La correlación fue -0,59 (IC 95% -0,524 a -0,649). La media del índice frágil-VIG en los participantes clasificados como no frágiles por SPPB < 7 fue 0,103 (IC 95% 0,094-0,112) y en los clasificados como frágiles, 0,242 (IC 95% 0,215-0,269). Se obtuvieron diferencias significativas en la media y distribución de la SPPB, según las categorías del índice frágil-VIG. La prevalencia de fragilidad según el índice frágil-VIG fue de 29,3% (IC 95% 25,2-33,9), inicial 19%, intermedia 7,5%, avanzada 2,9%. Se clasificaron como participantes frágiles según el índice frágil-VIG y no según la SPPB < 7, 10,4%, y al contrario 9,6%, siendo la media de dominios del índice frágil-VIG afectados 3,9 y 2,2, respectivamente. Conclusiones: El índice frágil-VIG presenta una adecuada validez convergente y discriminativa respecto a la SPPB, lo cual avala su uso en AP. Hay un 20% de participantes clasificados como frágiles de manera discordante, con distinto perfil. (AU)

Background and objective: Studies of frailty in primary health care (PHC) using frailty indexes are scarce. Frail-VIG index assesses the level of frailty through a multidimensional approach. The main objective was to investigate the convergent and discriminative validity of the frail-VIG index with respect to Short Physical Performance Battery (SPPB) in general population ≥ 70 years. Population, materials and methods: Descriptive cross-sectional study. We included 416 non-institutionalized patients aged 70 years or over from two lists of general practitioners in a semi-urban healthcare center. Main variables were: frail-VIG index and SPPB. Results: The value of the area under the ROC curve of frail-VIG index respect SPPB < 7 was 0.81 (95% CI: 0.76–0.86). Pearson's correlation coefficient was −0.59 (95% CI: −0.524 to −0.649). The mean of frail-VIG index in those classified as not frail by SPPB < 7 was 0.103 (95% CI: 0.094–0.112) and in the frail was 0.242 (95% CI: 0.215–0.269). We obtained significant differences in the mean and distribution of the SPPB according to the frail-VIG index categories. The frailty prevalence according to the frail-VIG index was 29.3% (95% CI: 25.2–33.9), initial 19%, intermediate 7.5% and advanced 2.9%. There were frailty people by frail-VIG index and not by SPPB < 7 the 10.4%; on the contrary the 9.6%, the mean of affected domains of frail-VIG index was 3.9 and 2.2, respectively. Conclusions: The frail-VIG index presents adequate convergent and discriminative validity with respect to the SPPB that supports the use in PHC. There is a 20% of participants classified as frail in a discordant way, who presents a different profile. (AU)

[Frail-VIG index: Convergent and discriminatory validity with respect to Short Physical Performance Battery in general population]. / Índice frágil-VIG: Validez convergente y discriminativa respecto a la Short Physical Performance Battery en población general.

BACKGROUND AND OBJECTIVE: Studies of frailty in primary health care (PHC) using frailty indexes are scarce. Frail-VIG index assesses the level of frailty through a multidimensional approach. The main objective was to investigate the convergent and discriminative validity of the frail-VIG index with respect to Short Physical Performance Battery (SPPB) in general population ≥ 70 years. POPULATION, MATERIALS AND METHODS: Descriptive cross-sectional study. We included 416 non-institutionalized patients aged 70 years or over from two lists of general practitioners in a semi-urban healthcare center. Main variables were: frail-VIG index and SPPB. RESULTS: The value of the area under the ROC curve of frail-VIG index respect SPPB < 7 was 0.81 (95% CI: 0.76-0.86). Pearson's correlation coefficient was -0.59 (95% CI: -0.524 to -0.649). The mean of frail-VIG index in those classified as not frail by SPPB < 7 was 0.103 (95% CI: 0.094-0.112) and in the frail was 0.242 (95% CI: 0.215-0.269). We obtained significant differences in the mean and distribution of the SPPB according to the frail-VIG index categories. The frailty prevalence according to the frail-VIG index was 29.3% (95% CI: 25.2-33.9), initial 19%, intermediate 7.5% and advanced 2.9%. There were frailty people by frail-VIG index and not by SPPB < 7 the 10.4%; on the contrary the 9.6%, the mean of affected domains of frail-VIG index was 3.9 and 2.2, respectively. CONCLUSIONS: The frail-VIG index presents adequate convergent and discriminative validity with respect to the SPPB that supports the use in PHC. There is a 20% of participants classified as frail in a discordant way, who presents a different profile.