read page 214 and 215 in fundamentals of Epidemiology and biostatistics by Ray M

Question

read page 214 and 215 in fundamentals of Epidemiology and biostatistics by Ray M. Merrill. also see the attached pages if you don't have a book.
Question : Once you have collected your exposure and outcome data, is it too late to control for confounding? Why or why not?

4 CHAPTER 10 / Study Designs they developed psychosocial disonders ehan if a penon withsut o hnovry f end abuse developed payehnsoeial disanders. As a general rule, the validity of a study requins that lim m fl" or Pim exceed 20%. Esdding those not likely to remain is the staty, maiag Perish contact with gserticipants, and peuriding ascentives are apperooches freqsendy uedl minimize the peoblem CONFOUNDING confounder n an adne he independent and the two rariables you want so eomis, that is, oss rabeod to the expoure arnl indepalest of ds r ship, is slso relatel to the beakh utecne. Consounding shoad iwas b as a posibile thresr to ralikdity in dervacineal stiale desgrs inokny cace asociations among variahla, partikulurly in eoskagic and crom atind vods aleo in ohservational case-control and cohort Mouis Only the of eration asd we would espect thae che dseritucn of savkers in r analysia level of stuuly so control for cusfandng. Thow methods may aho fs The thrat of conunding is rypicaly greater is dexipeive pelrselg e urns

Explanation / Answer

Answer.

No. It is not too late to control for confounding data once exposure and outcome data is collected. This is because there are various methods which are used to control for confounding in the anaalysis. They are stratified analysis and multiple regression techniques.

In stratfied analysis,  the effect between exposure and outcome in each of the various levels taken by the confounding factor is measured The confounding factor can have two or more categories.

In multiple regression technique, confounding factor is controlled side by side.If there are two categories in the outcome variable then multiple regression analysis is often used.

Related Questions

Navigate

• Browse (All)
• Browse R
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.