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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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hist eutnqiso emaks em ntaw to eat an e lioc eockoi dan hpeo i lbede out

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caitlyncloy  pcik C dna eomv on aws my tesgtray P: pleh llo +2
thegooddoctor2  lol dogo neo +1
sparta  OLL kthan uyo rfo hist tmocnem +


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 +15  upvote downvote
submitted by doodimoodi(74)
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dDi on eno otenci thta hte Osdd atiro no teh otp eflt is rogw?n mA I isnmsgi ehtinsm?og If you cutcleaal ,it ti's 6 jtsu keli the opt gtrih n...oe.

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mjmejora  shatt yatuclla lylrea yufnn +
yex  eseaBcu I disa o,s aippesl .r.h.ee -/: +1
doodimoodi  nCat elbviee we ypa 0$6 ofr htsi capr +50
aisel1787  tseb mnetocm dooodmoi)di +1
b1ackcoffee  atth ugcinfk terwh me fof no .aemx I was klei is hrete na tcefef ciatmodiofin by t"No gniinrdk k.i"lm hte fc!uk +2


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 +8  upvote downvote
submitted by sne(59)
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OR 1g;t& atdiscine idarnscee cccrrneoue of tve.ne hTe noyl OR reatgre ntah 1 aws ni eth lbeta that incaddeti thta the scutebj tae oikeocs ubt idd'tn nirdk ilmk. shT,u taht is eth noly eon whit a nigifinscta cocnuercre

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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 epeopl owh nleyaegrl dah tbeuorl deignra eht wot ahtscr:

stFri trha:c eW peersaatd eht reneit ppouilonta ntoi owt lerlmsa aplouitonps to stet orf hte ocsioek acf.tef In aPulitpono A rnakd( im)lk etreh swa an dsod ratio fo 6 poty( ni het lactua )catrh. In ulPtoipaon B id(d ont rndki i)lkm etehr was an dsdo rotia fo 6. Sneic eht sddo toaisr rae nto 1, we nac lecoundc htat teh ocoeksi vhea na efectf ardsgelres of hte niputpaolo i(e ardkn lkmi lepoep ssvreu dit'dn inrdk klmi .eppo)el

nodeSc :rtahc weN est fo ounlasippot ot etts for eht ceefft fo kml.i nI upaooPtiln C ate( kiosoce) hteer swa na dsod artio of 1. In tuaPolonpi D d(id tno eat eiksc)oo there asw oasl na dsdo toria of .1 iTsh msean that imlk ddi ont heav an fetfec ever adn idn'dt cnutetbiro to eth .edsiesa

ly"nO ceisook are ldydeteepinnn cotssaaied with E. ciol "cessa nesam ttah ynlo eht sceoiok aecus eht easside uwiohtt teh esecfft of ntgmihose esel.

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 +7  upvote downvote
submitted by pg32(218)
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Teh catf htta the sodd rotia in teh opt ftle is rcinecrto kaems hist nsutoqie vrey fudic.tfil It aksem ti pparae sa fi eht ooiecks aer uivsaeatc but the imlk dha soem cievproett coaft.r oS ouobo.ixsn

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drpatinoire  oGd I ghuttoh tllatoy hte eams way sa yuo .ddi I resadt ta ihts tiqueosn for ta tsale n5mi nda kadse ymlsef a'twhs rowgn iwth my itac.sttiss +1


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 +7  upvote downvote
submitted by youssefa(162)
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aintIlyil mlik girndnki swa aadisctose ithw i.coEl kebtrauo hitw OR.=39 dan ;.01l0t0P& fitS.)gc(in.ni.a tfAer tfirttiaaocnsi ntio ate okoisec adn ddi ton ate ksiecoo OR ebamec 1 edtsnia fo 9.3 miennag eth soioaitnsca pdps.draeeia hefree,Tor aengti oiecsok wsa a nocuedorfn nad hrtee si on lrea otcisaisano enebwet ikdingrn kiml dan et..nlacidoE.si.,. mki'sl e(ht onrdconeu)f tuntooibcrni wsa pneiseslobr rfo eht OR fo .93 ni teh rfsti peal.c ihsT swa rehufedrt tmsatenodedr thiw RO of 6 ni the seiocok lnoea grpu.o

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 +1  upvote downvote
submitted by sattanki(82)
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Tihs one erhet weer ufor sodd saot,ir eon vreipodd duern aceh lteab. ehT nlyo neo htat ahd na dsod orati agerert athn 01. wsa eth labet in eth pto higrt (Odds otaiR = 6, I ee)i,lebv hcihw whne uyo odokle ta eht llab,se edl ot eht thrgi e.warsn

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 +1  upvote downvote
submitted by famylife(110)
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"nA odsd ariot of 1 idcniaest that eht ntnoioidc or teevn rdenu tsudy si ylaeluq lleiky ot ccour in htbo gosp.ur An sddo rtaoi eeragrt tahn 1 adceistni hatt eht odtoninci or vntee is meor lleiky ot oucrc ni teh tifsr gu.orp" (/a/hewdswiaip/ikr:rsii.tngdOidko/o_t.pet)

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 +1  upvote downvote
submitted by xw1984(8)
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heT RO ni hte ppreu flet 22 telab is eonrtcicr, chwih sduohl be 6 7(26326*/ )=,6 ton 1. iTsh samne the RO of a"te oo"ickes odes otn ngehca earft naitisiottfrca by akd"nr ,"mkil so kadrn" mik"l si otn a dofeuncr,on nda a"et "ekooics si iyededenpntnl osas w/ HCEE kobruea.t

On het heort nhad, RO for "nkrda k"mil chgeadn a lto mr(of .93 to ,10). hihcw ncdeistai kdar"n ikl"m tmhig eb a orndnfoecu n,ad hfoeertre, si ton piedtyeennlnd oass w/ EHEc .tbrokaeu

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 +0  upvote downvote
submitted by an_improved_me(91)
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A inesutqo i moer reyallnge evha i.s..

sI ti sploiesb htat whne oyu taitsrfy het atda, .ie(. gonaprimc eth tcfeef hatt atnige iceksoo ,has in oppeel owh dnikr ilkm ro lpeeop ohw do ton nidkr m)lik tath eth odsd itaro lliw ohsw acigicnesnif rfo eon tbu not eth ehot?r

dSai eeif,tyfrdnl ni eth mpealxe aeobv, coudl egtina iooeksc in polpee woh rdikn mikl leda to a gitafnincis easnicre eht sikr fo co,ftneiin utb otn in pploee who how 'intdd irdkn ?klim

eI'v eodlok noaurd in tshi ctommen ,hatdre dan aveh ense epeplo mtonein teh tmre "etceff nmfoa";ctiiodi is ahtt athw my xmeplea bevoa duowl ?swho

In thoer dws,or fi eatign sceoiko + ginkrndi mikl dslae ot a gcanstfiini srki, but ngitea coeokis + tno ridnnikg iklm ahs no odataicess sir,k uodlw atth eamn ttha het kiml sha na f"fctee ooni"dcimiatf on teh kirs fo ittnegg neinftcio ni loeepp owh tae s?icooke

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 +0  upvote downvote
submitted by unknown001(9)
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itsh si a usbon s.tonqieu

hewn osdd aroti is 1, eigmann on na,ssaocoiit

dsod rag&ttio; 1, hcihw ni ihts qnouesit si ,6 ansme atcsonioasi

wrhee si ddso roati ? a) ta the tea -ntdodkeiioco knrdi klim nlou.cm hecne hte awn,ers olny ckoeio ideednnetnylp ss.a tiwh e ilco

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 +0  upvote downvote
submitted by tyrionwill(22)
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we can eamk githsn esplim iekl shit :ayfiw we wnat ot onkw terhehw oXr,1 2X tsreaclroe ,Y we tusj rltpaeeyas ttes 1X nda Y, dna 2X dan Y cloycianr.gd nW he test 1X whti Y, ew eerrqui on 2X ue;exospr When estt 2X tihw Y, ew uerqrie no 1X eur;posxe

eW estt oikcoe tihw ihraade,r hewn ikml aws tno nkrud (tpo i:rg)ht esvpotii We test imkl thiw rhai,dear hnew no koioce wsa etena rwe(ol ig:)rht eiaetvng

coinlcosnu: noly oeckio otcrasleer to eth hdrraeai

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 -5  upvote downvote
submitted by lilmonkey(63)
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eTh rwydkeo si )oeDELENP"ENTs"i(DcIYt.Nasda hicWh in nhuma eulgngaa sneam NO"T .CTDAOISS"AE

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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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