Dab tsi yog ib pab pawg sib luag randomized tswj kev sim?
Dab tsi yog ib pab pawg sib luag randomized tswj kev sim?

Video: Dab tsi yog ib pab pawg sib luag randomized tswj kev sim?

Video: Dab tsi yog ib pab pawg sib luag randomized tswj kev sim?
Video: Nkauj Tawm Tshiab 2020- yug lo yog ib pab ntxhai -Duab Ntxoo Yaj 2024, Kaum ib hlis
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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 ).

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