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Retired NBME 24 Answers

nbme24/Block 1/Question#15 (reveal difficulty score)
Results of a 5-year screening program for HIV ...
5% 🔍 / 📺 / 🌳 / 📖
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submitted by youssefa(162)
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oS mreunb of csaes tihw tepviosi oeylorsg gunrid ntaike"" erptnrsees clenepvare and oldush ton eb uedactcno rfo enwh ilcacnagtul tppluoinao at ksir. ponilaouPt at sikr = tTola ntilupooap - c.vleaernpe gDnio t,hta sum pu eht aaunnl cnicindese eftl = 400 + 250 + 025 + 003 + 030 = 001.5

pigAnpyl incndecei ulfmaro = 0(00,-01014/0)0500 = .052 oevr a lttao fo 5 aryse.

Aulann = /5025. = 050.%

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 +8  upvote downvote
submitted by karljeon(140)
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I dn'ot wnko if trehe si na atnequoi rfo sit,h ubt I iysablalc ppmeud tou verye dnsiioiv cssoar hte atbel to etg ~%5 no reaa.evg

Here yhte :e400ar / 000,6 = 67.52000 / 060,5 = 000 5.340 / ,3505 = 0.500306 / ,0550 = 2 9.50005 / 80,40 = 5.002

eTh greevaa fo hstee %s ofr all the eyasr = So55..8% t'asth oslce gouhne to %.5

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seagull  odog wr.ok I nfduo htis eotnqsiu noiagnny adn veag pu dinog thoes siennridogc the tmuaon of time we are gveni. +4
vshummy  llWe jstu do’tn leiundc eht tkiaen ayr..e. eaeubsc hatt eemssd me ..up +17
_yeetmasterflex  woH wldou we vhea nwnok nto ot ulenicd teh keanit r?aye mFro earvgea an*l**una* ?diecneicn +
lamhtu  oD tno deliunc natkie yrae bueeasc hte qntioesu mset is gsaink eaeavgr nnaaul .dneinccei Teh 0040 ssevoptii ta kitena odlcu vhae qceridau HIV vhwnreee, not usjt in the atsl are.y +9
neels11  ltayrliel idn'dt nihtk etehr swa na ualcat yaw to feiurg siht uot .tub ym hthgtou sescrpo wsa: kaoy ceniicned enmas WEN ass.ec os the luaann rvgaeae ta hte den of 5 sryae wdolu :be (# of NEW poplee ttah edsett eipovtsi at eht den fo ryae 5) (/# fo epploe at tath erwe ta ikrs at teh nbnigegin fo yrea 5) &;t---l aak at het den fo raey 055540/2 0 = %5.49 slo a fi oyu kloo ta eayr 5: ylu'ol see ttah hte ta skir ialunopotp is 8004 henw 030 wen scaes eewr fduon eht eayr ob.efre 5050 at the end of arye 4 UIMSN het 300 enw escas at hte edn of aeyr 4 olhsud vieg uyo 0574 as eth wne nptoiulpao at kr.si btu noitec hatt ned fo year 5 ew heav 008.4 dik if atth snmae 50 peeplo erew sfale itsovseip erebfo or 50 epleop ewer eddad tbu ni cdniceien t/shdiherctaet/b tn'od artimtte s' kdin of ilek DLUROW ID 0.127 nssmgaui vagaere naulna iedicennc is eht msea sa mivtuleuac icdenenci isht was ujst a ubnhc of wrdo tvim.o orysr if ti saw arnbelbuea ot loflow +

A related discussion (on a question from NBME 21) is here: https://nbmeanswers.com/exam/nbme21/714

+2/- csalib2(4)

The quickest way to do this is to add all the numerator ... = 1500. Then Divide by both year and susceptible population =1500 / (5*6000) = 5%.

+2/- peqmd(75)


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submitted by jotajota94(14)
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ennceidci = bunmer fo enw sase/c new cess+a louipnptoa at .kirs ewn sc=esa 0.25 lpPeeo at iskr ahtt arey 5500 nuig(cdinl wne eca.ss nI eno otnpi ethy ewer a auoponptil at ksir) /052 0505= %.94

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submitted by felxordigitorum(12)
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duecxlE hte ekatin y.rea ddA lal eht oietpivs lstsure 004550+(200+2300+0+3 = 50.0)1 vidieD 5010 yb hte aoltt rubmen fo stieanpt rmof the atrts of eht ndcienice rpeo,id ayre ,1 so 6000 ;g-&--t 05,0/00106.02=5 hits si teh vgreaae roscas lal 5 ye.ras roF aan,nlu idievd 502. by teh beunmr fo ,seyar 5 ->-; ./0525 = 500. g;t-&- .%5

tshTa' how I ogt i.t

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 +1  upvote downvote
submitted by sabistonsurgery(5)
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eInceidnc si citlalyyp adaulctlec sa a nuembr essedida rep spoeedx tuilnpapoo pre tuin tmei, aulsylu y.aer orF ehac y,ear dvieid the poplee onu,df by eth lpeope sdeo.epx ouY areirv at igursfe rf chea eary gnbei ,%4 5% nda %6, aeergva iengb %.5

Q: yWh tno tuonc ikante eary rof iwchh teh nceicined seesm ot eb %04?

Asn: So tats'h teh icrkt fo het ose.nutiq IT smees to ypiml hte eantik eyar aslo ash 0004 enw sces,a tub itsh s'nit eicni,ednc htsi si evnlrp!ceea tWha ndaeppeh eerh swa ttha teh napitoluop fo 0,0010 swa not egnib erdeecsn rfo A.SID hnTe uoy setdrta het ngnseicre ag.promr

ylylTapci in ayn ngnerceis gar,prom oyu lilw btslihsea eth sailnebe laepnrvcee fo the eisades by ingestt lal fo eth rgaleen op.iupalnto uYo ndfi 0400 enw sasec, tbu stehe were jtsu eeeucdttnd a.csse You udxceel temh frmo yruo .moitirongn For the txne year, you peek a wcaht no hte 0006 ltef, of iwchh 040 evdopel DAS.I Yuo autclcela inicenced ofr tshi eyar as %67. adn edxeucl hetes 004 orfm hte nxte ayer nda so .no

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submitted by sweetsummerblowout(0)
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t/iastcp.ltaaoyoot:plhretst1e-e-0de1.msa/ip/crts1e/nsds0l/11set-thhtussmrb

heT rhact no siht eits owhss /aahaurolTpeewpr//tbe .rteortcvnieg)eac( siT h oiunseqt skas ili"hokelod of smsingi an cssoiatna"oi - chhwi aisyacbll saenm htaw si teh efasl iiesovtp ,taer cwhhi si eht eninitdifo fo apahy/lpTe I o.rrer sn tuQeio smet ststae l0p5h.,0=aa wihhc si 5%.

taeB si eTpy II oer,rr and wdoul be 01% (slaef )e.tngivea 0%9 oduwl be rPwoe 1-at)e(b

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 +0  upvote downvote
submitted by guillo12(58)
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I ndo't nowk hte qteoniau rof thi,s btu I did is:th eTh msu of idnneecci epr a/yer eth msu fo rebnum iengrmaia in tolppiu.ano o..S. 08,12/,80500 = 0.8205 or 2%5.

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