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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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htsi tiqoesnu kemsa me watn ot eta na e clio eiocko nad phoe i ebdle otu

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caitlyncloy  pick C adn eomv on asw my srgytaet :P hlpe llo +2
thegooddoctor2  oll ogdo noe +1
sparta  LOL antkh ouy fro tsih tnoecmm +


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 +15  upvote downvote
submitted by doodimoodi(74)
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diD on noe ntoeci ahtt eth dOds roita on the top fetl si nw?gro Am I simgnsi mtno?isehg fI oyu lclcuteaa i,t st'i 6 ustj eikl eht otp rhigt ...no.e

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mjmejora  satth ualctyla yllera fuynn +
yex  Bcaeseu I sadi ,so piasple .h..ere -/: +1
doodimoodi  nCat vbeeeil we pya 06$ for isht pcra +50
aisel1787  tsbe eomncmt ddmoi)oiood +1
b1ackcoffee  ahtt ncgkufi rtehw me ffo no m.axe I wsa lkie is ereth na ftcefe octiaoinfimd yb o"Nt rnidgink l"mki. eth uckf! +2


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 +8  upvote downvote
submitted by sne(59)
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RO 1g&;t aiicdents seedraicn orcucreecn of vn.eet ehT ynol OR gareter tnah 1 wsa in teh atelb tath aeicdidtn that hte ucstjbe tae kieoosc utb nddit' rkndi l.imk h,sTu ahtt is hte lyon eon twih a fntsaciniig creoreuccn

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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 ppeeol ohw anerellyg had toluber aenirgd teh wot :rtchsa

sirFt :tcrha We tpsedaera the tnerei otopluianp oitn two rmlaels aplousotnip to tste rof het ckseioo .fftcea In Poauopnlit A akndr( mkl)i theer was an sddo triao of 6 t(poy ni eth culata htar)c. In npoalPouit B (ddi otn nrdik kil)m rthee wsa na sdod tirao fo .6 encSi teh dsod tsaior era nto 1, ew can dnelocuc htta eht kicoeos vhea an etfcef gdalreesrs fo the poapiltuno (ei nrdka lmik oeeppl srsevu d'idnt dinrk mkil oeep.l)p

ndeocS ca:htr ewN set fo ltpiosnaupo ot tset for teh efefct of lkm.i nI pionlouPat C (tea oesio)ck eehtr asw an sodd oaitr of .1 nI touianpoPl D dd(i ton tea oic)keos heert wsa aols na osdd traio of .1 hsTi sanem ahtt ikml idd ont avhe an feecft eevr adn di'dtn uoctebntri ot hte e.aessid

lny"O soikoec rea enynepntideld tidaoseacs itwh E. coli seac"s enmas ttha yoln the oeciosk uceas eht eassdie iowttuh eht fteesfc fo nsegoithm .lese

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 +7  upvote downvote
submitted by pg32(218)
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hTe tafc ttha the dods oirat ni hte tpo tfel is rncrteioc aeksm htis unqetois reyv lu.fcitfdi It amsek ti pepaar as fi eht eoicosk rea asvatciue but eth milk hda osme ietropcetv focrat. oS nu.osbioox

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drpatinoire  doG I htothug oyttall eth emsa ywa as ouy did. I etrasd at sthi sieunqto ofr ta slaet 5mni dan sadek syemlf swa'ht nrgwo tihw ym .tcasittiss +1


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 +7  upvote downvote
submitted by youssefa(162)
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nlitaIiyl milk knnigdir asw cadsetiaos with Eioc.l okurebat hwti 3R9O=. and 0.1&00t;Pl (Siicn.gat.if.n) erftA cfnaaittoritsi niot eta ckoseio dna ddi nto tae oseoick OR amcbee 1 ndtiase fo .39 ngneima eth icaosisnoat ps.ddraeapei efrr,Toehe gnaeti soikoec asw a oorcduefnn and hrete si no aerl ontsaaiocsi ewbeent dngknrii kmli and c,.l.aidEte.ni.os. msikl' e(th )ecdrnnoofu nritoobucitn was peoeibrsnls rof eth RO fo 3.9 in teh frsit .cpael shiT was tduefrehr nmdtotreeasd hwit OR fo 6 ni het ksoceio aelon purog.

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 +1  upvote downvote
submitted by sattanki(82)
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Tsih noe heetr rwee orfu sodd ,tasroi one rioepddv rudne chae alebt. The oynl eno ttha hda na dsdo ariot eregrat naht 1.0 asw eth ebalt in the pot rtihg (sdOd toiaR = 6, I ee),eibvl whchi newh uoy ekoldo ta the bl,laes eld to het hgtri rsn.ewa

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 +1  upvote downvote
submitted by famylife(110)
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n"A odds tirao fo 1 sntciedai ttha teh oniticdno or neetv dnreu uydst si lyqauel kelliy to uocrc ni tboh ogrpus. nA dsod traoi rtreage nhta 1 iineadtsc taht het notocnidi or vtnee si moer ylilke ot corcu ni teh strif .p"ogru (:eiraodtiphd/tit_s/dgws./iionO/epikr.kaw)

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 +1  upvote downvote
submitted by xw1984(8)
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Teh OR in het pupre ftle 22 aeltb is orinctr,ec hcihw dsuolh be 6 2(763/26* =,)6 otn 1. sihT msaen the RO fo et"a es"kcooi eosd not neachg eftar oiacisfttitnar by nradk" "mil,k so "drnak "mlki is ont a ,rnoduencof nad e"at kocs"eoi si neetednidnypl ssao w/ ECEH ke.arbuto

nO het ohtre had,n RO ofr dk"nra klmi" negdahc a lot f(rmo 3.9 to )0,1. hwcih idnisacte a"nrkd "kmli ihgtm be a nfoncuored ,dna ,etorrehfe is otn idetndelpyenn soas /w EcEH et.koruba

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 +0  upvote downvote
submitted by an_improved_me(91)
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A suetqion i orme erylaleng vhae i...s

sI it eboisslp thta hnew ouy fatysrit teh atd,a i.(.e gpmniacro het feetcf ahtt gitaen sieckoo ash, ni pepleo woh knrdi imkl ro oelppe woh do ton kdnri iklm) hatt eth dsod atrio lliw hwso ifaccniiengs ofr oen btu ont het ter?oh

dSia fltnie,fyred in teh epamlxe a,obev dolcu intega okioecs in lppeeo hwo nidkr lkim leda ot a ianfsicgnit naceisre eth krsi of ioncentif, but ont in eppoel who who td'din rdnki k?iml

Ie'v ekolod uardon ni tihs mnoetmc h,edtra dan vhea eesn oelepp nteiomn the mert tfcef"e ;imfotic"noiad is atth waht ym lpaemex avboe oludw oshw?

nI roeht sordw, if aingte ckiosoe + gnridink lmik daesl to a intnicigafs srki, ubt igaent coosike + nto dnirkgin milk sah no dstsaoaeci iksr, wudol taht mnae thta teh ilmk ahs na e"fcfet iionafcdot"im no eht irsk fo tgtgeni intcienfo in eepolp how eat co?eiosk

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 +0  upvote downvote
submitted by unknown001(9)
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shit si a nbsou qtoeu.sin

henw osdd ariot is 1, minaneg no ,aoaoitcssni

dods gtoi&atr; ,1 hcwhi in hsit nsqituoe si 6, anems tcoaioasnsi

ehewr is sdod riaot ? )a ta teh eta ecookniio-dtd drikn lkim un.cmlo hecen the ea,rnsw nloy ooikec dndinyetlnepe s.sa ihtw e olci

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew can aemk sgtnih emsipl lkie thsi :fwy ai we twna ot owkn whtheer ,rX1o X2 elsrcateor Y, ew ujts aepaeylrts sett 1X adn Y, nda 2X dan Y ordciacl.yng enWh stte 1X htwi Y, we eueqrir no X2 sruxpoe;e eh Wn tets X2 tiwh ,Y ew errqieu on 1X rsoeuxep;

eW ttes oceoki wiht ,adhaeirr hwen lkmi was nto rukdn tp(o hgirt:) evtspiio W e tset milk ihtw eria,hdra hwne on oiceko saw aeten (lwoer rig:)ht etvniage

uooi:nnsccl olny oceiok tecoalrrse to the ehadarri

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 -5  upvote downvote
submitted by lilmonkey(63)
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ehT eydkwro is sDaEioD.E)YLNPda(c"I"NTtNseE cWhih in unhma algaenug neasm "ONT AADTOES"CS.I

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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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