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    Mind over hormones: Sex differences in associations of well-being with IGF-I, IGFBP-3 and physical activity in the KORA-Age study.
        
        Exp. Gerontol. 59, 58-64 (2014)
    
    
    
				OBJECTIVES: This study examined associations between well-being and serum levels of insulin-like growth factor 1 (IGF-I) and its primary binding protein IGFBP-3 in a large population-based study of older adults. Additionally, the influence of physical activity on the effect of hormone levels on positive mental health was examined. METHODS: Cross-sectional data from 985 participants of the KORA-Age study (age range 64-93) was used in sex-specific multivariable regression analyses to assess associations between both IGF-I and IGFBP-3 with well-being (World Health Organization (WHO) -5) or ill-being (geriatric depression scale (GDS) -15). Models were increasingly adjusted for age, leisure time physical activity, sleep patterns, BMI, smoking, and cognitive scores based on causal diagrams. Well-being and depression scales were standardized to facilitate comparisons of growth hormone effects. Adjusted means of the WHO-5 score were assessed for the interaction between quintile levels of IGF-I or IGFBP-3 with high or low levels of physical activity. RESULTS: Fully adjusted models demonstrated that increased IGFBP-3 was positively associated with the WHO-5 in women (β estimate=0.14, standard error (SE)=0.06) and less so in men (β=0.11, SE=0.07). IGF-I was positively associated with the GDS-15 depression scale (β=0.11, SE=0.06) and negatively associated with well-being (β=-0.11, SE=0.06) in women and similar but not statistically discernable effects were observed in men. Adjusted mean WHO-5 scores illustrated the positive effect of both physical activity and higher IGFBP-3 on well-being in women only. CONCLUSIONS: These data demonstrate opposite and independent associations of IGF-I and IGFBP-3 on well-being in women, and suggest a neuroprotective effect of IGFBP-3 in older age.
			
			
		Impact Factor
					Scopus SNIP
					Web of Science
Times Cited
					Times Cited
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					Cited By
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				3.529
					1.198
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        Publikationstyp
        Artikel: Journalartikel
    
 
    
        Dokumenttyp
        Wissenschaftlicher Artikel
    
 
     
    
    
        Schlagwörter
        Aging ; Igf-1 ; Igfbp-3 ; Physical Activity ; Well-being
    
 
     
    
    
        Sprache
        englisch
    
 
    
        Veröffentlichungsjahr
        2014
    
 
     
    
        HGF-Berichtsjahr
        2014
    
 
    
    
        ISSN (print) / ISBN
        0531-5565
    
 
    
        e-ISSN
        0531-5565
    
 
     
     
     
	     
	 
	 
    
        Zeitschrift
        Experimental Gerontology
    
 
		
    
        Quellenangaben
        
	    Band: 59,  
	    
	    Seiten: 58-64 
	    
	    
	
    
 
  
         
        
            Verlag
            Elsevier
        
 
         
	
         
         
         
         
         
	
         
         
         
    
         
         
         
         
         
         
         
    
        Begutachtungsstatus
        Peer reviewed
    
 
    
        Institut(e)
        Institute of Epidemiology (EPI)
    
 
    
        POF Topic(s)
        30202 - Environmental Health
    
 
    
        Forschungsfeld(er)
        Genetics and Epidemiology
    
 
    
        PSP-Element(e)
        G-504000-003
G-504090-001
 
     
     	
    G-504090-001
        PubMed ID
        25106099
    
    
    
        WOS ID
        WOS:000345698100010
    
    
        Scopus ID
        84912140293
    
    
        Scopus ID
        84905636681
    
    
        Erfassungsdatum
        2014-08-13