Ulingo lweklinikhi luquka abantu abathatha inxaxheba kwaye bafuna ukuphendula imibuzo ethile malunga nohlobo lwongenelelo lwezonyango. Oku kungabakho iziyobisi okanye olunye uhlobo lwezonyango, ezifana nokutshintsha kwezondlo okanye ukusila.
Iimfama ezimbini
Kwimiqathango yesilingo sekliniki, i-blind-double means that neither patients nor researchers know who gets a placebo kwaye ngubani ofumana unyango.
Ngenxa yokuba izigulane abazi into abayifumanayo, inkolelo yabo malunga noko kuya kwenzeka ayiyikucoca iziphumo. Ngenxa yokuba abaphandi abazi, nokuba abakwazi ukubonisa izigulane malunga noko bakufumanayo, kwaye abayi kuhlaziya iziphumo ngokweenkolelo zabo ezizimeleyo malunga nokuba zeziphumo ziya kuba ziphi.
Ukuba abaphandi bayazi ukuba ngubani ofumana unyango kodwa abathathi-nxaxheba ababi, kuthiwa yi-single-blind eye.
I-Placebo kunye namaqela okuLawula
I- placebo yinto engasebenzi (kaninzi ityhulwa yetshukela) inikwe isigulane endaweni yonyango.
Kwizilingo zamachiza, iqela lokulawula linikezelwa i-placebo ngelixa elinye iqela linikwe isiza (okanye olunye unyango) olufundiswayo. Ngale ndlela, abaphandi banokuqhathanisa nokusebenza kweziyobisi ekusebenzeni kwe-placebo.
Ukulawulwa kwe-Placebo kubhekisela kwiqela lokulawula elifumana indawo ye-placebo. Oku kukwahlula kwiingcaphephe ezenza ukuba abathathi-nxaxheba baphathe unyango baze barekhode iziphumo.
Isivivinyo seKliniki esisiSebenzi esisiBili-mbini
Ngaloo ndlela, ityala le -clinical elilawulwa kabini, elingaboniyo, lilawulwa yicandelo lonyango olubandakanya abantu abathathi-nxaxheba apho kungekho caleni eyazi ukuba ngubani ofumana unyango kunye ne-placebo enikwa iqela lokulawula.
Ngaphambi kokufika kweli nqanaba, abaphandi bavame ukwenza izifundo zezilwanyana, izilingo zeekliniki ezingabandakanyi iqela lokulawula, kunye nezifundo ezingenangqiqo.
Izifundo eziphezulu kakhulu zibuye zenzeke ngokungaqhelekanga, nto leyo ithetha ukuba izifundo zihanjiswe ngokukhawuleza kwi-placebo kunye namaqela angenelelo. Isichazi-magama se-DBRCT sisoloko sisetyenziselwa ezi ntlobo zophando.