Iqela lezizwe zamanye amazwe liqhube isifundo apho wafunda khona ukuxhomekeka kobomi babantu abavela kumandla otshintsho kubunzima bomzimba wabo. Kwavela ukuba amandla omntu kancinci kancinci kwiminyaka edlulileyo igalelo kukonyuka kobomi bendlela yobomi.
Kwinkqubo yokufunda, izazinzulu ezimele iYunivesithi yeDyunivesithi yaseOhio Michigan (zombini i-United States) kunye neziko lemibutho ye-MOOPLE (iJamani) iqhuba uhlalutyo lwezifo ze-4500 Abantu abadala kunye nabantwana abangaphezu kwe-3,700 abangenileyo.
Ithuba lexeshana eliqhelekileyo lolwazi lwezonyango ligqithile kwisiqingatha senkulungwane kwaye ligubungele i-1948-2014. Kwangelo xesha, uhlalutyo luqikelelwa izizukulwana ezibini kwaoko nje iminyaka yabameli eyayineminyaka engama-31 ukuya kwengama-80. Eyona nto iphambili kuqikelelo ngaxeshanye yayikukuba isalathiso sobunzima bomzimba sivumela isidingo sokwahlula ubukho bokutyeba kakhulu ngokugula kakhulu. Injongo yesifundo yayikukuchonga unxibelelwano lobomi lokuphila kwabantu abanemigangatho yobunzima bexesha. Ngenxa yoko, isiphumo sohlalutyo sabonisa ukuba abantu baba semdeni baba ngabantu abadala abanobunzima obuqhelekileyo bomzimba, kodwa oko kwakufumene kakhulu kwinqanaba lokutyeba, kodwa kwakungaqhelanga kwinqanaba lokutyeba.
Kuyaphawuleka ukuba "okwesibini" phantsi kobomi baphelelwe lixesha bubunzima obuqhelekileyo ebomini bobomi, kwaye kubo, 'yi-visa "eneempawu ezincinci ezivela kwi "I-BMI eqhelekileyo" ye-BMI: Ukuba ne-bit ethe tye okanye ngaphezulu kwemizimba emiselweyo yomda ophantsi kumda ophantsi wesiqhelo-oko kukuthi, incinci kodwa ngaphandle kwengxaki. Abameli abaliqela abaliqela becandelo elichazwe apha ngasentla babehlala abantu abaqala ukukholisa ngobunzima bomzimba kodwa belahlekile ebudaleni. Okokugqibela, abo bafumana izikhombisi ezingaluthengisiweyo behlangabezana neengxaki ezinkulu ngobomi obuhlala buhleli iminyaka engama-31 kwixa elizayo bakhulisa. Kuyaphawuleka ukuba, xa ihlalutya, iingcali zithathele ingqalelo inani elikhulu lezinto ezahlukeneyo ezinxibelelana kakuhle enokuthi ichaphazele imeko yobomi ngendlela yesondo yengozi yokwabelana ngengozi, njl.
Ukushwankathela ulwaziso lwezazinzulu lwazisa ukuba ngelixa bengakwazi ukuxhasa indlela yendlela enjalo. Nangona kunjalo, iziphumo zomsebenzi wezenzululwazi ziyangqina ukuqaphela okokugqibela kweqela elinye lophando. Ngokukodwa, ngo-2013, iingcali zazibonakalisiwe ukuba ubukho bobunzima obuncinci kakhulu kwisiqingatha seminyaka emibini yobomi, ngokuxhomekeka ekubeni akukho kunqongophala kokukhusela kakhulu. Iziphumo zophando zapapashwa kwi-Adals yeHlabathi ye-Epidemiology.