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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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hsti nsutoqei samek me antw to ate an e lioc okocie and epho i ledbe tou

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caitlyncloy  ikcp C nda omve no was ym regystat P: hlep oll +2
thegooddoctor2  lol doog one +1
sparta  LLO htakn uyo rof shti mcnetmo +


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 +15  upvote downvote
submitted by doodimoodi(74)
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Ddi on neo ecitno taht het ddsO aiotr no eht top ftle si ng?owr mA I ngiissm e?mhtgonis If yuo tuccealal ,ti t'is 6 usjt like het top grthi ..e.on.

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mjmejora  ttsha lalutcya aylerl nyunf +
yex  sBeucae I iasd so, silpaep re..eh. -:/ +1
doodimoodi  aCnt eelbiev we ypa 6$0 orf hits cpar +50
aisel1787  setb mmtcoen iodimood)od +1
b1ackcoffee  atht nikugfc thewr me fof no am.xe I wsa keil is eehrt na teceff oiamtoicdfin by Nto" gnkidrin "lmi.k het ufck! +2


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 +8  upvote downvote
submitted by sne(59)
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OR ;g&1t iaiscnted deisecnar cnurreeocc of vten.e hTe lnyo OR gearret naht 1 asw ni teh ltabe ttah idtncdeia thta eth cstjebu aet eksioco utb nidd't ndkri l.kim ,sTuh ahtt si hte lyon oen hiwt a iascnfinitg ccerneurco

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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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oFr poeelp hwo rnealygle dha oeurbtl irdgnea teh wto ht:csar

Firts th:arc We radtaesep teh nertei aioloptpun toni wto amslrle opoplsantui to tste rof het ciooske tecf.fa nI luiopaPtno A (kdrna k)iml hrete saw na dsod raoti fo 6 (tpoy in eht lautca hrc.)at nI tluaiooPnp B (ddi not rdkni imlk) hteer saw an dosd irtoa fo .6 iSecn hte ddos rtaios era tno 1, ew can uclcendo thta eht sceiook ahev na efecft adrrgleess fo het opuapntoli (ie akrnd lkim eeplop sursve nitd'd nkidr lkmi pop.ele)

ocnedS rach:t New ets fo puoostinlpa to sett fro hte fcftee fo imkl. nI olpanutPoi C a(te skeioco) ethre aws na dods ariot of 1. In Panliupoto D di(d tno aet osike)oc rheet swa slao na dods taroi fo .1 sihT ensam thta lmki did tno aveh na ftecfe veer adn tdnd'i eburocntit ot the .eesidsa

ln"yO isocoke ear nletnyiepnedd castoadeis twih .E cilo cae"ss emasn that lyno eth ocoeski cesau het daieses whuitot teh etsfefc of tsieghmon lse.e

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 +7  upvote downvote
submitted by pg32(218)
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hTe atfc taht het dods atoir ni het otp tefl si tccienorr meska hsit sounqtei evry ilffducit. tI mesak it erapap as fi hte sekcioo rea caitvueas tbu hte lmki hda some tvptroiece afotrc. oS xnuosoi.ob

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drpatinoire  odG I hguttho lyaottl eht asme wya sa oyu did. I atserd ta stih toeniusq orf at tasle imn5 nda dekas mlsefy whst'a wrnog with ym itt.sstscia +1


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 +7  upvote downvote
submitted by youssefa(162)
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yllntaIii milk gndinkri wsa assoeaidtc twhi iolEc. uerkboat hiwt RO9=3. nad &00.0;P1tl ii)ncSgf(a..nti. erAft otinrctaftiisa noti eta soikoec dan ddi ton eta ckosioe RO amceeb 1 daniets fo 9.3 einagmn eht sotsaiincoa r.addpaieesp erorehTfe, eiatgn eksiooc asw a ucofondnre dan erthe si on ealr citisoaaons tenwbee nkniridg limk nad ,csE....td.eaiolni miksl' the( orndon)efuc nutbiiorncot was nelisbporse orf hte RO of 93. ni eht fsirt epla.c shTi saw hrftueder snottmrddeea htiw OR of 6 in eht ioskoec nleao u.rogp

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 +1  upvote downvote
submitted by sattanki(82)
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iThs noe ereht erwe fruo osdd ,tsiaro one vedidopr rendu heac .table ehT lnoy neo htat had na ddos raoit teergra ntah 01. swa het btlae ni het top gtrhi (dsOd iaotR = 6, I biel,e)ev ichwh hwne uoy okdole ta the all,esb dle ot eht ihrgt ar.ewsn

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 +1  upvote downvote
submitted by famylife(110)
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nA" dods oaitr fo 1 isacdeint htta het ntiniocdo or tvnee enrud dyuts is alyulqe eyklli to coruc in hbot or.supg An sdod oirta retaerg ahtn 1 deiatsicn taht the ooicitnnd ro enevt is more eyklil to rucoc in hte rfsti ugr."po (agdiihdtpkinr./p_iOodierss./waot/k/ewti:)

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 +1  upvote downvote
submitted by xw1984(8)
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hTe OR ni eth urpep letf 22 tleba si ito,crcern ihwch dsulho be 6 (7262/*36 )6,= otn 1. Tsih neasm teh OR of a"et io"koesc sode ton agehcn eatrf tncioiiattsraf yb r"kdna km,"li so rknda" ilmk" si ton a e,runodfnco nad "tea o"oikcse si etlnpdyideenn soas /w ECHE ruobk.aet

nO the htroe han,d RO orf rdakn" kl"im adgehnc a olt (mofr .39 to ,.0)1 ichhw esdcinait kdn"ra "imkl hgmit eb a nofucdnero n,ad ,reetehorf is tno lpineendednyt osas /w cEEH be.toaukr

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 +0  upvote downvote
submitted by an_improved_me(91)
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A nsoqeiut i omre nleleyarg aevh s...i

sI it psieobls that enhw yuo rtfiytsa eht d,aat (e..i mnipoacrg het cetfef ttha geanti ecsioko s,ha in pelope owh ikrdn mkli or peoepl hwo do ont dinrk )klmi atth het dosd aitor lilw swoh nnfaicecgisi fro noe but not the ?toerh

iSda ffr,ilyedtne ni the pmaxeel baeo,v locud aegnit ocekois ni pepoel how nikdr lmki eald ot a nfcnistagii carensei the krsi fo ,fionntcei btu not ni ppoele ohw how t'didn inrdk ?kmli

vI'e oleokd rnouad in ihst eontmmc tr,haed dan vhae seen plepoe oetinnm het retm ef"ecft "facdniio;oimt si thta awht ym pelmaxe vbeoa dwlou hows?

In toehr wo,rds if gainte ocieosk + innkigdr klim leasd ot a ifgcntiisan r,kis btu agtein oiskoce + not iknigrdn iklm sha on sasotadeci ,rsik wodul atht amne tath eht ilkm sha na cfte"ef in"mfdoiaioct on eth kris fo tngtige eicftnoin ni eeppol owh eat io?eckos

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 +0  upvote downvote
submitted by unknown001(9)
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this si a ubons .eituqnso

enhw ddos arito si ,1 igneman no ,oasitnacsio

odsd gati;otr& ,1 cwhhi in hsti ntsiqoue is ,6 nmsea aoaicnossit

weerh is sodd oatri ? a) ta het eat odki-edociotn rkidn mkil umolc.n neech the asrnwe, nyol kocieo yetedlnniednp ass. tihw e olci

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 +0  upvote downvote
submitted by tyrionwill(22)
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ew cna eakm nisgth misple keil isth y wafi: ew wtan to know therhew or,1X X2 relatorcse Y, ew sujt eapytarsle ttes X1 dan Y, nda X2 adn Y cngia.ydrcol neW h etts 1X iwht ,Y ew euirqre no X2 eues;xrpo Whn e estt X2 tihw Y, ew rqreiue on X1 poe;usxre

eW ttes coekio iwht ridh,aera ewnh lkim swa ton rnkud t(po h:tgri) opeiitvs e W tste iklm htwi rhde,aria ehwn no ockeoi wsa teean (lewro h)ri:tg vaeeintg

:innsccuolo lnoy eoiock etlrcaoers ot hte aredriha

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 -5  upvote downvote
submitted by lilmonkey(63)
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ehT yerwkdo si LY(N"EdoPa"s)DEtDeTNENca.Isi Wcihh ni unhma lagnuaeg manse "NOT AISTOC.DA"SE

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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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