Associations between physical fitness and comorbidity of problematic mobile phone use and depression among first-year students of a medical college in Jiangsu
Objective To exploring the associations of the physical fitness index with depression,problematic mobile phone use,and comorbidity,so as to provide references for exploring the comorbidity co-cause and co-prevention of mobile phone depend-ence and depression symptoms among adolescents.Methods A stratified cluster random sampling method was used to select 1 984 first-year students at two medical colleges in Jiangsu Province from October to November in 2021.The Patient Health Questionnaire-9(PHQ-9)and Self-rating Questionnaire for Adolescent Problematic Mobile Phone Use(SQAPMPU)were used to evaluate the risk of depression and symptoms of problematic mobile phone use.Tests included grip strength,standing long jump,50 m running,modified sitting forward flexion,20 s repeated traverse,1 min sit-ups,20 m round-trip running(20 m SRT),and 800/1 000 m run.Binary Logistic regression analysis was used to explore the associations of the physical fitness index with depression and prob-lematic mobile phone use,and mediating effects were analyzed.Results The overall detection rates were 28.63％for depression symptoms,24.95％for problematic mobile phone use,and 13.65％for comorbidity.Compared with students without depressive symptoms,students without mobile phone dependence,and students without comorbidity[0.08(-1.84,2.06),0.14(-1.84,2.06),0.15(-1.82,2.12)],students with depressive symptoms[mild:-0.03(-1.91,1.41),moderate:-0.22(-3.17,2.37),severe:-1.62(-3.33,-0.16)],mobile phone dependence[-0.45(-2.17,1.06)],and their comorbid symptoms[no depression and mobile phone dependence:0.06(-1.98,1.54),depression without mobile phone dependence:-0.37(-2.21,1.17),both:-0.52(-2.17,0.97)]had lower physical fitness index(Z/H=4.40,20.84,20.80,P＜0.01).The risk of depression and problematic mobile phone use,and the co-morbidity detection rate in the higher physical fitness index group were lower than those in the lower physical fitness index group[OR(95％CI)=0.61(0.47-0.80),0.62(0.48-0.79),0.65(0.47-0.91),P＜0.05].Analysis of mediating effects indicated that problematic mobile phone use had an indirect effect(indirect effect=0.014)on the physical fitness index and depression,and accounted for 36.84％of the total effect.Conclusions The physical fitness index is associated with depression,problematic mobile phone use,and comorbidity.Physical exercise and physical fitness efforts should be strengthened to prevent the occurrence of mobile phone dependence,depression,and comorbidity.
Body constitutionCellular phoneBehavior,addictiveDepressionComorbidityRegression analysisStudents
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