Proč IQ prodlužuje život?

EDINBURGH – Lidé s vyšším bodovým ziskem v testech inteligence během dětství a rané dospělosti se obvykle dožívají vyššího věku. Tento výsledek byl zjištěn u lidí v Austrálii, Dánsku, Anglii, Walesu, Skotsku, Švédsku a Spojených státech. Byl vlastně zjištěn u každé populace, kde výzkum proběhl.

Vliv inteligence na úmrtnost skutečně konkuruje dobře známým rizikovým faktorům nemocí a úmrtí, jako je vysoký krevní tlak, nadváha nebo zvýšená hladina cukru či cholesterolu v krvi. Její účinek je téměř stejně důležitý jako dopady kouření.

Rozdíly v inteligenci lidí mají environmentální a genetické příčiny. Výsledek testu inteligence v mladším věku je zčásti ukazatelem toho, jak do dané doby okolní prostředí zpracovalo mozek i zbytek těla. Děti s nižší porodní váhou mají například později v životě sklon k chronickým onemocněním. V průměru mají rovněž mírně nižší inteligenci. Leč testy toho, zda by porodní váha mohla spojitost mezi inteligencí a úmrtností částečně vysvětlovat, žádnou vazbu nezjistily.

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