Perception of loneliness, happiness, and health, and quality of diet. The moderator role of weight status

Aim: to determine the relationship between perceived loneliness, happiness, and health, and quality of diet, observing the moderator role of weight status in elementary school children during the state of alarm decreed for COVID-19. Methods: a descriptive, cross-sectional study in a sample of 116 Spanish schoolchildren. The perception of loneliness, happiness, and health was assessed using three items of the Health Behavior in School-aged Children questionnaire. The quality of their Mediterranean diet was assessed using the Mediterranean Diet Quality Index quetsionnaire for children and adolescents. Anthropometric variables were collected through a self-reported questionnaire, and for the calculation of body mass index the Quetelet index (kg/m(2)) was used. Results: the descriptive analysis showed no differences in the perception of loneliness, happiness, or health, quality of diet, or anthropometric variables (p > 0.005), except for weight (p < 0.005), according to sex. The inferential analysis showed that higher values in quality of diet are correlated with higher scores in perceived happiness and health (p < 0.005). In turn, the linear regression test showed an association between quality of diet and perception of happiness after the model was adjusted for normal weight (R-2 = 0.382; p < 0.005). Likewise, it showed a significant association between quality of diet and perception of health after the model was adjusted for overweight schoolchildren (R-2 = 0.455; p < 0.005). Conclusion: the association between perceived health and happiness with quality of diet seems to be moderated by weight status.