Video: Dab tsi yog ib pab pawg sib luag randomized tswj kev sim?
2023 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-05-24 11:02
A thaum uas tig mus tsim, kuj hu ua a parallel pawg kawm, piv ob lossis ntau qhov kev kho mob. Cov neeg tuaj koom raug random muab rau ob qho tib si pab pawg, kev kho mob yog muab, thiab tom qab ntawd cov txiaj ntsig tau muab piv. Nws yog "tus qauv kub" rau theem 3 kev sim tshuaj(1). Random assignment yog lub ntsiab tseem ceeb ntawm a thaum uas tig mus tsim.
Ib sab ntawm qhov no, dab tsi yog qhov kev sib tw ua pawg sib luag?
A kev kawm sib npaug yog ib hom kev kho mob kawm qho ob pab pawg ntawm kev kho mob, A thiab B, yog muab rau ib qho pab pawg tau txais A thaum lwm qhov pab pawg tau txais tsuas yog B. Lwm lub npe rau hom no kawm suav nrog "nruab nrab ntawm tus neeg mob" thiab "tsis yog-crossover".
Qhov thib ob, qhov kev sib piv thiab kev kawm crossover yog dab tsi? A kev kawm sib npaug kuj tseem hu ua "nruab nrab tus neeg mob" lossis "tsis yog- crossover ” kawm. Nws txhais tau tias yog ib hom kev kho mob kawm, nyob rau hauv uas ob sab caj npab kho mob, A thiab B, yog muab kom ib pab neeg tau txais kev kho mob caj npab A nkaus xwb thaum lwm pab pawg tau txais kev kho caj npab B xwb.
Ua raws li qhov kev pom no, hom kev kawm twg yog qhov kev sim ntsuas randomized?
A kawm tsim uas randomly muab cov neeg koom rau hauv ib pawg sim los yog a tswj pab pawg Raws li cov kawm yog ua, qhov tsuas xav tau qhov sib txawv ntawm cov tswj thiab cov pab pawg sim hauv a randomized tswj kev sim (RCT) yog qhov txiaj ntsig sib txawv uas tau kawm.
Dab tsi yog 2 caj npab randomized tswj kev sim?
Kev ntsuas ntau yam riam phom RCTs. RCT tsim kev paub rau cov neeg feem coob yog tej zaum tus qauv ob-armed, parallel-tsim, tus kheej randomized sim. Cov ob caj npab Hauv qhov no feem ntau suav nrog kev kho mob caj npab thiab cov tswj caj npab (lwm txoj kev kho mob / placebo caj npab).