Video: Dab tsi yog kev tshawb fawb crossover hauv kev sim tshuaj?
2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Hauv tshuaj, a kev kawm crossover los yog crossover mus sib hais yog longitudinal kawm nyob rau hauv uas cov kev kawm tau txais ib theem ntawm kev kho mob sib txawv (los yog raug). Hauv randomized soj ntsuam kuaj mob , cov kev kawm yog random muab rau txawv caj npab ntawm lub kawm uas tau txais kev kho mob sib txawv.
Ib yam li ntawd, nws tau nug, puas yog kev kawm hla dhau RCT?
Common kawm designs Parallel thiab crossover designs yog ob tus qauv tsim rau RCTs . Dhau li randomization ntawm cov txheej txheem kev kho mob, ntxuav hauv thiab ntxuav tawm ntawm lub sijhawm tsim nyog feem ntau siv hauv kev tshawb fawb crossover kom tsis txhob muaj kev cuam tshuam nqa.
Kuj Paub, dab tsi yog ob txoj kev crossover kawm tsim? Hauv ib crossover tsim , txhua tus neeg koom nrog raug xaiv ua ntu zus ntawm ob lossis ntau qhov kev kho mob yog li ntawd tus neeg koom nrog raug siv raws li nws tus kheej kev tswj hwm. Qhov no tsim npe a ob - lub sij hawm crossover tsim.
Tom qab ntawd, dab tsi yog qhov kev tshawb fawb ua ke thiab hla kev?
A txoj kev tshawb no kuj tseem hu ua "nruab nrab tus neeg mob" lossis "tsis yog- crossover ” kawm . Nws yog txhais raws li hom kev kuaj mob kawm , nyob rau hauv ob txoj kev kho mob caj npab, A thiab B, tau muab kom ib pab pawg tau txais kev kho mob nkaus xwb A thaum lwm pab pawg tsuas tau txais kev kho mob caj npab B.
Dab tsi yog kev npaj tsim qauv crossover?
Npaj crossover yog kev sim tshuaj kho mob, uas cov neeg mob (cov ncauj lus) raug xaiv rau kev kho mob ntawm ob qho kev kho tam sim no thiab tshiab. Txhua pab pawg tau hloov pauv ntawm kev kho mob tom qab lub sijhawm tshwj xeeb thiab rov pom dua rau lub sijhawm muab sijhawm.
Pom zoo:
Vim li cas cov kws tshawb fawb tshawb fawb txog kab mob?
Cov kab mob tsis yog tsuas yog muaj ntau, ntau yam, thiab tseem ceeb rau kev nyab xeeb, lawv ua lub luag haujlwm tseem ceeb hauv kev hloov pauv ntawm lawv cov tswv. Ntxiv rau qhov xaiv qhov siab uas lawv ua rau cov pej xeem ntawm tes, raws li tau hais los saum no, lawv txhawb kev hloov pauv ntawm cov noob thiab cov genomes thiab sib sau cov noob nyob thoob plaws ib leeg
Dab tsi yog kev tshawb fawb kws tshawb fawb txog keeb kwm keeb kwm los kwv yees lub sijhawm tuag piav qhia vim li cas kev kwv yees tsis tas yuav ncaj?
Ib tus kws tshawb fawb kws tshawb fawb txog keeb kwm tshawb fawb kev txhim kho kab ntawm kab hauv lub cev los kwv yees lub sijhawm tuag. Cov kev txiav txim siab no tsis yog qhov yooj yim ib txwm vim tias tus nqi ntawm cov kab menyuam loj hlob tau cuam tshuam los ntawm ib puag ncig cuam tshuam xws li thaj chaw nyob, huab cua, thiab huab cua puag ncig
Dab tsi yog qhov hloov pauv tau cov hniav hauv qhov kev sim tshawb fawb?
Eggshells yog qhov hloov pauv tau cov hniav vim tias lawv tau tsim los ntawm cov tshuaj zoo ib yam li cov uas ua cov hniav txha hniav laus
Kev txo qis hauv kev tshawb fawb yog dab tsi?
Reductionism muaj ob lub ntsiab lus: qhov ntau dua ib qho yog tias kev txo qis yog hais txog txhua txoj hauv kev rau kev piav qhia uas sim txo qhov nyuaj ntawm cov qauv lossis kev coj tus cwj pwm kom tsawg dua chav nyob. Hom kev txo qis no kuj tseem tuaj yeem pom hauv kev tshawb fawb ntau
Dab tsi yog peb txoj hauv kev tshaj plaws ntawm kev tshawb fawb txog kabmob kis?
Ob hom kev soj ntsuam uas pom ntau tshaj plaws yog kev kawm ua ke thiab kev tshawb fawb-tswj rooj plaub; hom thib peb yog kev kawm hla ntu. Txoj kev tshawb fawb. Kev kawm ib leeg yog qhov zoo ib yam hauv lub tswv yim rau txoj kev tshawb fawb. Case-control study. Kev kawm hla ntu