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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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hsit iutsnoqe skema em atwn ot aet an e ocli eckoio and oeph i edelb out

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caitlyncloy  pikc C nad moev on was my rttgsaye :P hlpe lol +2
thegooddoctor2  oll good one +1
sparta  LOL ktanh ouy orf tish tmmonec +


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 +15  upvote downvote
submitted by doodimoodi(74)
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diD no eno cenoti hatt the Osdd rtoai on eht tpo eflt is w?ongr mA I siingsm hismoent?g fI you aclcuteal ,it ts'i 6 tusj ekil the opt ihrtg .neo...

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mjmejora  shtta atualylc aelrly ufnny +
yex  eeBsauc I adsi s,o ilpsaep .e.rhe. :-/ +1
doodimoodi  ntCa ieebevl we pay $60 for shti pcra +50
aisel1787  tebs mtmonce o)iodooddim +1
b1ackcoffee  atth fkcnuig ewtrh me ffo on axe.m I wsa klei si hetre an ffcete omacifidtoin by o"tN dkiinrng l"m.ik het u!kcf +2


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 +8  upvote downvote
submitted by sne(59)
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RO t1;&g iindcstae eiceasndr reorcecucn of ent.ev hTe lyno OR egterar tnah 1 wsa ni teh eatlb htta edaidcnti atth eht buctjse aet ieokcso ubt ind'td krnid iklm. h,sTu thta is eht nloy neo ihwt a inaisnctgfi rocceceurn

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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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roF opeepl woh anygleerl dah letbrou inrdgae hte wto acstr:h

Fsirt htc:ar eW erpsatead eth nietre lapuointop noit two amrlels unoplptaios to ttse rof teh eosiock tfca.fe nI niuaplooPt A nkrda( m)ikl erthe wsa na sodd roita of 6 opyt( in eth lcauta a)cthr. nI tolPpaonui B d(id nto nridk ki)lm heret was an odds aoitr of .6 iScen eht dods aorits ear not ,1 ew anc codcelun ttha eth eikcoos aehv na cefeft gersldraes fo eth linptopuoa ei( kdnra klim loeppe suervs nd'tdi nkdri klim )eppeol.

oSdenc hactr: wNe tse of tnuiopopsla to tste rfo teh ecffet of lkm.i In tonaluipoP C ta(e ecok)sio hrete swa na osdd oirat of .1 In tpuPnooila D (ddi otn eta eio)okcs trhee asw asol an sddo aoitr of .1 iThs maesn tath mikl ddi otn heav na teeffc rvee adn nddi't unttbreoic ot hte d.saesie

n"Oyl iceoosk rea eeynnildntdep ossditacea tihw E. olci aessc" masen ahtt only het cioeosk ceuas hte isdesea iottuhw teh estfcfe of htgemsoin s.lee

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 +7  upvote downvote
submitted by pg32(218)
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hTe acft that teh ddos aorit ni the opt felt is reciotrnc mkaes shit tesoinqu rvey ldcitfuif. It saemk it aeparp sa fi eht ikoceso aer avsaetciu tbu eth mkil hda osme pcitetrvoe .fcaort So xiso.obuon

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drpatinoire  doG I ugtohth tlyltoa teh smae wya sa ouy dd.i I tadser ta iths seutinoq rof at tlesa mi5n adn eksda ymslfe hts'wa rgwon wthi my sattt.scsii +1


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 +7  upvote downvote
submitted by youssefa(162)
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taillyIni imkl rinikgnd aws cstdiaeosa iwth iEl.oc bakouret iwht R3.9O= and t&1l.P0;00 tinSi).ia..cnf(g feArt iiotsianafttcr ntoi tae koceiso and did tno ate ckisooe OR bcmaee 1 anisedt fo 3.9 minenag het siiscontaoa pdr.sidpaeea reTfe,eorh etangi ceskoio aws a nedonuofcr nda ehter si no lare nosaociisat between rnidikng lmik dan d,.a..ioel.cnts.iE i'kmsl et(h fodnron)cue nrnoiocbtuti swa iploerssenb rfo teh RO fo 3.9 in eth irtsf claep. isTh aws ufhdrtree oneedsartmtd twhi OR of 6 ni eht scoieok loean urg.po

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 +1  upvote downvote
submitted by sattanki(82)
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sTih eon etrhe rwee rouf dsdo a,srtio eon eorpdivd nderu haec l.tabe The nlyo one ttha ahd an dsod irtoa tgeearr tanh 01. swa teh ltabe in het pot rtigh (sdOd taRio = 6, I iel,b)vee ihcwh whne yuo okloed at the el,salb del to eth rgith saer.wn

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 +1  upvote downvote
submitted by famylife(110)
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"An sodd irota of 1 nscaditie atht hte dnontcoii or neevt ernud yudts si laylueq lkeily to curoc ni bhot r.uosgp An ddso raoti etrgear tanh 1 iecisndta that het idtooicnn ro evnte is emro lykeil to crcuo in teh rfsti pgrou." (paOgk/dwher.sdeiriospdwa/i:tionti._t/k/i)

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 +1  upvote downvote
submitted by xw1984(8)
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The RO in het ppreu tlef 22 eatlb si renrtoc,ic hciwh oldhsu eb 6 2(7362*/6 =6), tno 1. Tihs seman the RO of et"a isock"eo osed nto cnheag frate orsntiaaitfict by kr"and k",ilm os "drnak ml"ik is not a ,rdcneooufn dan a"et ieok"soc si deldpenniytne ossa /w ECEH akeutro.b

On teh rteho ndah, RO ofr dk"arn kiml" chdnega a tol (omrf 9.3 ot .)01, hhwci nciisedat ar"nkd milk" mtihg be a cnfnuoerod na,d eeher,tfor si nto dtynpedeenlni asso w/ HEcE .aktbuoer

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 +0  upvote downvote
submitted by an_improved_me(91)
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A ieonqust i mero neealrgly evha s..i.

Is it pilsoebs hatt nwhe oyu atyrfsti hte at,ad ..(ei ngmaocpri hte ffeect htta igatne osoieck ,ahs in poelep hwo rnkdi mkli ro opelpe owh do ton ikndr mkli) hatt hte sdod oitar ilwl show iiccgsaninef for oen tbu tno teh rote?h

iadS flyentidfe,r in the elxepam baev,o udolc aignet eikosco in loppee hwo nrkdi kiml laed to a cningtsiiaf rsieacne eth skri of e,oitcfnni tbu otn in opelpe woh owh n'ddit nidkr kilm?

vIe' oleodk anduor ni shit nmtmeoc rdathe, and eavh esne loppee tnmione eht mrte ceefft" indtomacifo";i is ttah hatw my mlapeex bveoa lodwu h?ows

nI hetor dow,sr if gatine koocsei + rnigikdn mikl daels to a tiicinfansg risk, tub eganti ioeckso + otn inkdring lmik hsa no oeacdiasst ks,ir lwuod thta neam ahtt the klim sha na ce"tfef tmiiiooc"fand on het iskr of ntgtgie fitcoinne ni eoppel ohw ate c?eioosk

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 +0  upvote downvote
submitted by unknown001(9)
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isth si a usnob oteqns.iu

hnew dosd ratoi si ,1 angemin no sitinc,aaoos

sddo tragot;&i ,1 cwihh in ihts oiunqtse si 6, sanme astsniaoico

ehwre is dods toira ? )a at het aet dd-iocetiokon rdnki kmli ncl.oum ehnec het rs,wnae nloy cokoei tenelniddepyn .ass tihw e lcio

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 +0  upvote downvote
submitted by tyrionwill(22)
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we nca make gntihs iesmlp klie htis ywi:fa ew antw ot know erewthh ,X1or X2 ocsteraler ,Y we sujt sreptaayel etst X1 nda ,Y and X2 nda Y nogryi.lcacd eh Wn ttes X1 htwi ,Y ew ireruqe no X2 epos;xrue Wn he sett X2 whti Y, we qirueer no 1X xu;rseeop

eW ttes iokeoc hitw aharer,di hnwe ilmk wsa not rkudn tp(o :ht)gir eposivit W e stet ilmk iwht rir,haeda hnew no oikceo saw aeten rol(we rt:)gih ngaveite

nu:ciolsocn loyn okeoic claoertrse to eht rdhraeia

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 -5  upvote downvote
submitted by lilmonkey(63)
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eTh dywroek si NEseEN"iocPd.NaaD(LsE)DtI"TY hWhci in hmnau angualge sanem TN"O SSCEA"D.IOAT

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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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