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Retired NBME 24 Answers

nbme24/Block 4/Question#30 (reveal difficulty score)
An investigator is studying an outbreak of ...
Only cookies are independently associated with E. coli cases 🔍 / 📺 / 🌳 / 📖
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 +67  upvote downvote
submitted by ∗niboonsh(409)
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stih iunqstoe asmek em nwta ot aet an e ocil oiecok adn poeh i bdele uot

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caitlyncloy  cipk C nda mevo no saw ym egaystrt P: elhp lol +2
thegooddoctor2  llo ogdo eon +1
sparta  LOL tnahk you ofr itsh ecmomnt +


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 +15  upvote downvote
submitted by ∗doodimoodi(74)
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idD on eon necito ahtt the dOds aitro no teh pto tefl si ogrw?n Am I isinmsg ?gisehnmot fI you auctlelac ,it it's 6 sjut eilk the top hgtir .n.eo..

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mjmejora  htats aluacytl laylre funyn +
yex  aseBcue I sadi ,so ielppsa ee.rh.. /-: +1
doodimoodi  tnaC leveibe ew pay $06 ofr isth rapc +50
aisel1787  estb mncoemt dmdidioo)oo +1
b1ackcoffee  ttha nikcfug rwhet me fof on amex. I swa like si hrete an feceft imnitcooaidf yb "toN ginknidr im."kl teh kf!uc +2


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 +8  upvote downvote
submitted by ∗sne(59)
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OR &;tg1 siidtanec eacdirnes erconcceru fo etv.ne heT oynl OR ergraet nhat 1 wsa in the abtle ttha aitneicdd htat the sejtcbu aet iscoeko but d'ntid ndirk k.mli ,uhsT atth si eth lony eno wthi a afnnciiigts nrcreuocec

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For a more systematic approach. First look at cookies p-val is sig when not stratified, the top table is stratified the OR > 1 => sig => cookies have association.

Then look at milk p-val is sig when not stratified, the bottom table stratified the OR = 1 => loss of significance => milk have no association.

+1/- peqmd(75)

Uworld ID 1173 has a good explanation for how to look at stratified analysis.

+/- peqmd(75)

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 +8  upvote downvote
submitted by ∗qiss(20)
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rFo plpeeo ohw elgaelnry ahd tlrbeou rgiedan eth tow hacrs:t

sFtri acrt:h eW eestdraap eth eeintr otiunppoal itno wot sarmell loptuspaoni ot tets rof eth seociko fa.tfec nI pntPaluooi A nrka(d mi)kl erhte was na sodd iorta of 6 p(yto ni eth tcalau )athcr. In upoilaPton B (idd ont nkrid mik)l eterh asw na dsdo ratio fo 6. nieSc eth osdd siarot era otn 1, ew nac ednluocc ttha eht ioksoec aehv an cfteef easrsldgre fo the oopilutpan e(i rdank klim elepop evsrsu di'tnd idrnk mlik epe).lpo

coneSd :hatcr Nwe tse of natosupplio to tste rfo eth ectffe of milk. nI tPnilpouao C ae(t oe)ciosk teerh saw an ddos tiora of .1 nI loanPtpiuo D dd(i otn aet ikecoso) hrete wsa oals na sodd airto fo .1 Tshi snaem htta imkl ddi otn ehva na ecffet vere nda d'tidn cbuitonetr ot hte e.diasse

nlOy" eoiosck are lytpenedennid tacsoeaisd ihwt E. lico "ecssa easnm tath olny teh oskioec acesu het esesida httoiuw teh sfeetfc of hontmseig es.le

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 +7  upvote downvote
submitted by ∗pg32(218)
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The tfac taht het odds rtoia ni eth opt tlef si crtrcioen smkae siht tnqesoiu yrev ftdf.iclui tI mseka it rpapae sa fi het sceokoi rae iavscueta tbu eht mlki ahd msoe eeporitctv frcato. So xi.nsoouob

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drpatinoire  doG I hutghot yloatlt het mase ywa as uyo dd.i I seatrd ta isht tneqsiuo ofr ta aeslt in5m dna kaeds lyfems twash' nogwr wtih my ca.tsststii +1


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 +7  upvote downvote
submitted by ∗youssefa(162)
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lIalinyit lkim nnkiirgd swa saasitdceo tiwh cEoil. uaotrebk tihw 3R.9O= dan 10tl;00&.P )gtai.cii..Sf(nn efArt atnrctifiaoist otni aet keicsoo adn ddi nto tae kooesci RO mbaeec 1 asteind fo .93 agneinm eht ianitoossac sdeidperp.aa Te,ereorfh tgiaen okoscie wsa a onernfuocd nda rehet si no aerl soiatcaniso bnwetee nikidrgn lkim dan .td.n.io,c.eislE.a lmki's (eht cfonu)oendr ortntibiucon aws presonlsebi orf eht OR fo 3.9 ni eth ftsri p.leac siTh wsa urerhdfte tadeesmdortn twhi RO fo 6 ni the oeiscko elnao pro.gu

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 +1  upvote downvote
submitted by ∗sattanki(82)
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Tshi neo heetr ewre rouf sodd ,itosra noe prdivdeo rednu echa bealt. hTe lyno eon ttha dah an sddo ortai geratre nhat 01. was eth tbela in teh otp ightr (ddOs Riota = 6, I )eviebel, wchih ehwn you keodlo ta het laelbs, eld to eht ghitr erw.asn

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 +1  upvote downvote
submitted by ∗famylife(110)
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A"n sdod otiar fo 1 ntdcesaii ttah hte nicodoitn ro ntvee rdune ystdu is lleuqya ieyllk ot uorcc in hotb opsg.ur An dods ariot rreeagt tnha 1 idctnsiea htta het ioctinndo ro enevt si roem lylkei to cucor ni teh fisrt ogu.r"p (dat/trkid.g_ewiont.s/wpiadrekO/:iihiosp/)

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 +1  upvote downvote
submitted by xw1984(8)
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Teh RO ni eht puerp tefl 22 letba si rc,irtcneo ihwhc hsolud be 6 (272*/636 ,=6) tno .1 Tshi nasme teh OR fo a"te okeco"si sedo ton cghnea fetra asrcttfaitioin yb rk"and "km,il os rakn"d mlik" is otn a cduon,frneo and tea" ceokoi"s is lteyeedinpndn aoss /w ECEH bura.kote

nO eht troeh h,dna RO rfo rk"and klim" anceghd a tol rm(fo .93 ot 0,).1 chwih inscdiaet n"dakr lkmi" thmgi eb a nfcrudeono ,and reeotfr,he is ton pnetdnnideely aoss /w HcEE a.tbkeour

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 +0  upvote downvote
submitted by ∗an_improved_me(91)
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A ineotusq i mero ygneraell heva .is..

sI ti plisbeso thta nhew oyu tfirtasy eht a,dat i..(e imcarpnog the ftefce tath genait iksoceo a,sh ni oeeplp who ikndr imkl or eepolp ohw do nto dirkn lm)ki atth eth odds oitra llwi ohsw ecanifcgniis rfo neo btu ton eht h?erto

iSad yedi,rffnlte in teh pelmeax vo,bea uodlc aitnge kosoiec in pelpeo woh nkrdi milk dlae ot a ticnafsinig caieersn eht krsi of fi,nnoicte utb otn in eoppel hwo owh in'tdd nirdk iml?k

'veI ooedlk oarnud in thsi mtoemnc dh,trae nda ahve eens popele neotmin the mrte f"etfec ;odniociaftmi" si htta ahwt my apexlem vebao dulow ?oshw

In terho dwo,rs fi aiteng oiokcse + iigkrndn milk desla to a niantfgiics iskr, ubt entagi kcioseo + ton rninidkg kiml ash on sesditaaco krsi, dulwo htta mean ahtt hte limk has na tffeec" "otfimiancdoi on het sikr fo ittngge nfiocneti ni eleopp woh eta oeoscki?

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 +0  upvote downvote
submitted by ∗unknown001(9)
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hsti si a bsuno uisne.tqo

enhw sddo troai si ,1 nmngiae no ciaisonoas,t

osdd ;atriog&t 1, hwhic ni siht qsintueo is ,6 ensam oiissotcnaa

rewhe si osdd iorta ? )a at the tea t-odoenikcodi nkidr kmli nulmo.c ncehe eht nsa,rwe oynl oiocek ynldnetpniede .sas itwh e iolc

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 +0  upvote downvote
submitted by ∗tyrionwill(22)
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we nca ekma tsginh pmlies leki tshi :yfaiw we nawt ot wkon htewhre o,r1X 2X rrecetslao ,Y ew sjut aytrlaesep etst X1 nad ,Y dna 2X dan Y yc.gorialcdn neW h test X1 wtih ,Y ew irqeeur no 2X expreu;so eWhn tset 2X wiht ,Y we ieqerur no X1 rxo;pseeu

eW stte kicooe tihw harared,i hnwe mlik swa not rnkud p(ot t):irgh iivtpsoe e W ttes lkmi ithw ,aerarhdi ewhn no ekioco wsa neeat erowl( hgrt:)i aenvtegi

scoluonnc:i nlyo oekcio acslteorer to eth ehardari

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 -5  upvote downvote
submitted by ∗lilmonkey(63)
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eTh ywkredo is IEaotYD.P"aeE"E(sNiDNTcdsN)L hihWc in hunma lnegaagu smnae N"OT "SOCATS.DIEA

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I agree it's a poor choice of words but what they mean by "independently" associated is that which of the variable is the only one associated with dz without any confounding.

+1/- peqmd(75)

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