The Mediating Role of the Muscle Quality Index in the Relation of Screen Time and Abdominal Obesity with Health-Related Quality of Life in Chilean Schoolchildren

Delgado-Floody, Pedro; Gómez-López, Manuel; Caamaño-Navarrete, Felipe; Valdés-Badilla, Pablo; Jerez-Mayorga, Daniel

The Mediating Role of the Muscle Quality Index in the Relation of Screen Time and Abdominal Obesity with Health-Related Quality of Life in Chilean Schoolchildren

dc.contributor.author	Delgado-Floody, Pedro
dc.contributor.author	Gómez-López, Manuel
dc.contributor.author	Caamaño-Navarrete, Felipe
dc.contributor.author	Valdés-Badilla, Pablo
dc.contributor.author	Jerez-Mayorga, Daniel
dc.date.accessioned	2023-04-26T21:00:58Z
dc.date.available	2023-04-26T21:00:58Z
dc.date.issued	2023-02
dc.description	Indexación: Scopus	es
dc.description.abstract	Screen time (ST) and abdominal obesity have a negative effect on health-related quality of life (HRQoL). However, there is little information regarding the mediating role of the muscle quality index (MQI) in these relationships. The aim of the present study was to investigate the association between HRQoL, physical status (i.e., anthropometrics and fitness), lifestyle (i.e., ST and physical activity), and the MQI, and then to determine the potential mediating role of the MQI in the relation of ST and abdominal obesity with HRQoL in Chilean schoolchildren. The cross-sectional study included 750 schoolchildren (girls, n = 332 and boys, n = 418) aged between 10 and 14 years (11.73 ± 1.08 y). MQI, lifestyle, fitness parameters, waist-to-height ratio (WtHR) and HRQoL were measured. HRQoL presented a significant correlation with WtHR (r: −0.19), VO2max (r: 0.20), physical activity after school (r: 0.26), ST (r: −0.26) and MQI (r: 0.15). According to MQI, the high-MQI group reported higher HRQoL than the low-MQI group (low MQI: 36.10 ± 3.63 vs. high MQI: 37.43 ± 4.00, p < 0.001). In the mediation model, ST and abdominal obesity were negatively linked to HRQoL; the indirect effect confirmed that MQI is a partial mediator in the relation between ST and HRQoL (indirect effect = −0.04; SE = 0.02; 95% CI: −0.09, −0.01) and in the relation between abdominal obesity and HRQoL (indirect effect = −1.81; SE = 0.83; 95% CI: −3.41, −0.40). In conclusion, MQI is related to better HRQoL in schoolchildren, and the negative relation of ST and abdominal obesity with HRQoL is mediated by MQI. © 2023 by the authors.	es
dc.description.uri	https://www.mdpi.com/2072-6643/15/3/714
dc.identifier.citation	Nutrients Open Access Volume 15, Issue 3February 2023 Article number 714	es
dc.identifier.doi	10.3390/nu15030714
dc.identifier.issn	2072-6643
dc.identifier.uri	https://repositorio.unab.cl/xmlui/handle/ria/49005
dc.language.iso	en	es
dc.publisher	MDPI	es
dc.rights.license	Atribución 4.0 Internacional (CC BY 4.0)
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/deed.es
dc.subject	Fitness	es
dc.subject	Muscle quality index	es
dc.subject	Guality of life	es
dc.subject	Schoolchildren	es
dc.title	The Mediating Role of the Muscle Quality Index in the Relation of Screen Time and Abdominal Obesity with Health-Related Quality of Life in Chilean Schoolchildren	es
dc.type	Artículo	es