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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 iesutoqn saemk em wnta ot tea an e coil ikeoco adn hope i dleeb uto

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caitlyncloy  pkci C adn ovme no aws ym taytsegr P: eplh lol +2
thegooddoctor2  llo doog eno +1
sparta  LLO ntakh ouy rof hist tmoenmc +


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 +15  upvote downvote
submitted by ∗doodimoodi(74)
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iDd on noe icteon htat hte sOdd torai no eth pto tefl is ogn?rw mA I siignsm igeho?ntms If uyo leclatuca t,i ist' 6 jstu liek eth top ithrg .eon...

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mjmejora  hstat ctallyua aleylr nnfyu +
yex  caBesue I dais so, paiselp h.e..re /:- +1
doodimoodi  tnaC ebievle we pay 0$6 fro itsh capr +50
aisel1787  sbet tmmnoce oimoddd)ooi +1
b1ackcoffee  tath gnficuk rhtew me off no xa.me I swa keil si eehrt na cftefe tancfoiiidom by to"N nidinrgk k."iml eth u!fck +2


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 +8  upvote downvote
submitted by ∗sne(59)
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RO g&t;1 ecsdinati sniaedrce errneuccco fo eve.tn heT only RO eategrr tanh 1 aws ni eth ebalt ttah nicdiedat ttah het bujetsc tae seikooc btu dn'tid kinrd .milk Tsh,u htat is hte oyln eno whti a nciasginitf ucroreccen

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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 peoelp hwo nlalegrey dha oluetrb grendia eth otw r:tchsa

sFrti trhac: We rsapadeet teh ietner puinloaopt iont tow lalsrme opsplaoitnu ot tets rof eht coksoei tc.affe In liptnPooua A rakn(d i)lmk tereh wsa an ddso troia fo 6 (oypt ni teh taacul h)a.rtc In aootiplnuP B ddi( ton inkrd i)kml erhet asw na ddos atoir fo 6. icneS eth dods itoasr rea nto ,1 we can celcndou ahtt eht iksooec haev na efecft rredsalges fo the tpapounoli e(i rkdan mikl eppleo srsevu 'dnidt dkinr ilkm oep.)lep

codneS htc:ar wNe ets fo oluoptinspa ot sett for het effcte fo m.kli In iuotaolPnp C (eta k)ceoios heret asw na odds rioat fo .1 nI iutnoPlpoa D d(id ont ate oc)isoek reteh aws loas an osdd itrao of 1. ihsT eansm ttah limk idd ont eahv na eetffc vree nad d'intd ntrtubecoi to teh dsie.eas

yO"ln osieock are lteiynddepnne astasodeic thiw .E cloi "scaes emans ttah lony het kooices ceusa the assdiee wthotiu teh tefcefs fo simntgheo els.e

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 +7  upvote downvote
submitted by ∗pg32(218)
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The ctaf htat eth odds oatir ni hte otp tfel si iterncrco esamk htis seunitoq revy dcffiul.it It seamk it areapp sa fi het kcosoie aer asacvuiet but eth ilkm had omes rvitoepetc .torcaf So uo.oxnisob

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drpatinoire  God I uohgtth tlatloy the mesa ayw as ouy did. I dtrsea at shti isquneto orf ta lesat mni5 and deask mslyef 'swath gwron tiwh ym i.tstsasitc +1


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 +7  upvote downvote
submitted by ∗youssefa(162)
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tyIalilin klmi kgnnirdi was dtsaceiaso ihwt lEioc. utroeabk twih 9=3OR. nda .t0&l1P;00 f(aSgntic.)ini.. rtefA fnicoiatiatsrt iotn eta cosekio adn idd ont ate eoikocs OR amecbe 1 iaedsnt of 9.3 nminega eth oionaciasts aeesdiap.dpr rfeerT,eho ingtea ioskoce was a dnorfunoce and rthee si on aler sooaaniscti ewetben knindgri mlki dna cnlt.oE..iis.d.,ea i'mlsk (the )onnfucredo onoitcbnitru was srisnepbelo orf eth RO fo .39 ni eht ristf ec.apl isTh asw tfhrrueed drtneedstmao htiw RO fo 6 in het iokceso neola rgou.p

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 +1  upvote downvote
submitted by ∗sattanki(82)
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sTih neo rhtee eerw uofr dsod tosri,a one oddevipr deunr aehc lt.bae eTh ylon one htat dha an osdd otiar garrete hatn .01 aws hte ebatl in het top rthgi (dOsd tRaoi = 6, I e,vile)eb chhwi hwen oyu ooklde at eth lsba,le led to eht rthgi srnawe.

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 +1  upvote downvote
submitted by ∗famylife(110)
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"nA odsd raito fo 1 itandcsei htat eth nonoitdci ro etevn nrdeu tdusy is yeualql eiklly to orucc in btoh srgoup. An ddso toiar rrageet hnta 1 tdainecsi ahtt teh oidtcoinn ro veten is ermo killye to ocucr ni het itrfs pru."go (pewkiskiar.inhg.a/idw/tdrteo:tp/sd/io_iO)

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 +1  upvote downvote
submitted by xw1984(8)
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ehT RO in het ppure tfel 22 albte is c,renicort icwhh usdohl eb 6 72(/66*23 =6,) tno .1 hiTs aenms teh RO of "eat i"soceko odse tno cehang feart isaintatcrofit yb nardk" "klmi, so kn"rda "klim is ton a unncr,edoof dan a"et okosie"c is ydneedpnnltei osas /w ECHE ekauor.bt

On eht horet na,dh OR orf rnakd" mikl" hdeancg a lot rf(om 93. ot 0,.1) icwhh eaicdtins nd"kra k"ilm igmht eb a nfrdounoce nd,a h,ofrereet si tno iedtlydnpenne saso w/ EcEH .orekabut

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 +0  upvote downvote
submitted by ∗an_improved_me(91)
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A otsneuqi i erom erlngyale haev is...

sI it sepslbio htta ehnw uyo sfrtyati eht d,taa .e(i. gponcrami het fcefte ttha gniaet okcoise a,sh in oepple who irdkn milk or eolepp who do ont dnrki lmki) hatt hte dsod toira liwl whos gcinnascfeii rof one tub tno het ore?ht

aidS ffytrlenie,d ni het plaxmee bave,o dlcuo egntia ksoceio ni opepel owh nridk kmil alde to a gatincifisn esrcnaie hte iskr of eionfni,tc utb ont ni oeelpp woh ohw ddnit' nikrd imkl?

'Iev dlooek druoan ni shit omecntm ,haedtr dna aevh eens pepelo nietomn eth mrte "ecffte m;initcoifd"ao is htta twha my peeamxl oabve uwdol w?soh

In thore w,dros fi aetngi eoscoki + nkridngi mlki dsael to a fiantigicsn sr,ik tub negtia iookcse + not idigrnnk kmil ash on oacatsisde s,kir owuld thta neam htat eth ikml hsa an f"fceet moainotd"cifi on eth rkis of ggnteti iiocftnne ni olpeep ohw tae ?ecooisk

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 +0  upvote downvote
submitted by ∗unknown001(9)
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sthi is a sunbo teqionu.s

wneh dods orati si ,1 maninge no ci,naaioosts

ddos t;tgra&oi 1, cihwh in sith uniqetos si 6, asmne ciiosnosata

ehwre si sdod ritoa ? a) at the tae itkoenio-ocdd nkidr lkmi mloc.nu cenhe hte arens,w ynol ieookc dyteenidnelnp ass. htwi e ilco

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 +0  upvote downvote
submitted by ∗tyrionwill(22)
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we acn meka tihsng elismp ilke iths iaw yf: we atnw ot nkwo hrtwhee ,o1Xr 2X reetorlsca ,Y we usjt psatelyrea test 1X and Y, and X2 adn Y odycgn.lirac We hn tset 1X hitw ,Y we rreiqeu no X2 x;seuroep en Wh estt X2 htwi Y, ew eureqir on X1 epuer;oxs

We stet ocekio iwht rider,haa nehw kilm saw nto drunk o(pt :hi)gtr itipvseo We etts imlk ihwt dar,arihe when on oeoikc aws enate (lewro hti)gr: nivetgea

lscoiocu:nn olyn ekcooi osceerrtla to eth rdaaerih

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 -5  upvote downvote
submitted by ∗lilmonkey(63)
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heT owedyrk si eoEas"PatNTDE(D)dNIENc".isYL ichhW in nuahm gunelaag aesmn O"NT TCA.DAEIS"OS

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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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