Ho lula tafoleng ea hau nako e telele ho ka eketsa menyetla ea ho shoa pele ho nako. Bo-rasaense ba hlahlobile tlhaiso-leseling e tsoang liphuputsong tse tsoang linaheng tse 54: nako e sebelisitsoeng moo ba lutseng lihora tse fetang tse tharo ka letsatsi, boholo ba palo ea batho, palo ea batho ba shoang le litafole tsa batho (litafole tsa bophelo tse hlophisitsoeng ke lik'hamphani tsa inshorense ka palo ea inshorense le lefu). Liphetho tsa boithuto li phatlalalitsoe ho American Journal of Preventive Medicine (American Journal of E thibelang Medicine).
Batho ba fetang 60% lefats'eng ka bophara ba qeta lihora tse fetang tse tharo ba lutse ka letsatsi. Bafuputsi ba hakanya hore sena se kentse letsoho ho isa bohōleng bo itseng ho shoa hoa batho ba 433 selemo le selemo lipakeng tsa 2002 le 2011.
Bo-rasaense ba fumane hore, ka karolelano, linaheng tse fapaneng, batho ba qeta lihora tse ka bang 4,7 ka letsatsi ba lutse. Ba hakanya hore phokotso ea 50% ka nako ena e ka lebisa ho phokotso ea 2,3% ho tsohle tse bakang lefu.
Mongoli ea etelletseng pele Leandro Resende, moithuti oa bongaka Univesithing ea São Paulo School of Medicine, o itse: "Ena ke data e felletseng ho fihlela joale, empa ha re tsebe hore na ho na le kamano e teng." Leha ho le joalo, maemong afe kapa afe, ho bohlokoa ho emisa ho lula tafoleng re sa sisinyehe: “Ho na le lintho tseo re khonang ho li etsa. Tsoha hangata kamoo ho ka khonehang. "
Khokahano lipakeng tsa nako e sebelisitsoeng u lutse le lefu e fumanoe lithutong tse ling hape. Haholo-holo, ba emang litulong tsa bona metsotso e 'meli feela ka hora ho tsamaea ba na le phokotso ea 33% kotsing ea lefu la pele ho nako ha ba bapisoa le batho ba lutseng ba sa khaotse (bala ho eketsehileng ka sena mona).
Kahoo leka ho tsamaea khafetsa kamoo ho ka khonehang letsatsi lohle. Malebela ana a bonolo a tla u thusa ho lula u le mafolofolo ha u ntse u sebetsa ka botlalo ofising.