University:
Johns Hopkins University
Course:
ME.250.699. | Medicine Elective
Academic year:

2023
Views:

81

Pages:

2
Author:

Yasin N.

Study Desigins Descriptie Descube occurance g dia by time, Plave, paven. Experimental Cintervention studies) Investigator intentionally alten one more jacter to study the effcets → Avalylical. Exermin etrology &, Coural Langgation Uncont wollked thals Frial & out control or componison gwap. ag: Phare I or 11 chmal trab •Prevalome surneys • Cave-sever Survallene data • Derer.& analysis g grocithaely collected desta. (registries, mortality clataete) ↓ Quasi-experimental Investigator lacks full control over the intervention. but conduits Study St Cont molled triails Tenals contel group Unit og sumchomizaln -Individul comm) Jield twals.unit comm/chuultes -Nesled cau-cont •Hybriel Cave-cohost Cour-Crocrone Senal cro Secin Randomized (RCTS) - Intervention allocated randomly. all pontivyointe) home equal chance & beny allocated to each g Study quoip. Quasi-ramclomized -Allacation, using Scheries, such as acc. to DOB, mog hospital recorde. date in which they imited to peruticipate in the study Non romclomid Don cout Underlying romdom procen -Cohort (Rot&pm) • Cave-conta • Cross-sed •Ecological -Case-Com or covu only. Non. experimented Cobservational Suched No wdesvention Investigator Obsen urithout interventu Relative guik (RR) / Prevalence ratio / Risk erectio Measunes how cakety the exposed group will develo via diisi nicomponed to mpomposed group... RR- Inciclence is the exposed Incidence in the imenposed alatb 8 Coll Inespretation: Ponticipantle who smoked mere & time Waali hoo to develop lung cancer compared to those who did wot smoke A Odds ratio 1. Oddig dislinenposed populha 9 OE b Odels g dis in n non-exposed popul". OC/d. odds g alls. given Exposure 21/1 OR E- 00. Bias in cros Sctional study 1. Selection bicu dys ane thigh allocation systematic diyf a Pouli apoile Studiy - Sompling biers representatrienen. Prevalenu nudenu bieu occus when orylosume occur bieu (Neymom bieu C omenment of disin muned. Prevented by →Randomizat Rapone non ereponse bien Coust che eauly happen to acover 2. Measurement bies - Systematis diy craneeliss morning outcomes - Misclanijid (misdiagnosed. Undiagnosed) 4 Recall bias - Lead-time bias - henyth bicued sampling 1-31 SIA CO Prevention b Blinding easy Parhupailu Outcomes