Metabolomics Workbench : NIH Data Repository

Analysis	Metabolite Name	Measured Value	Units	gender	race.eth	smoking_status	ccenter
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.0843930264449767	relativeMedian	Male	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.0856527060077821	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.0964662258169266	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.126451406733626	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.134045449371931	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.169042988430006	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.18196300193732	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.186195245387329	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.193833539719511	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.21585462232133	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.217847607649035	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.228001587319211	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.231780151911544	relativeMedian	Female	Black/Africian American	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.238237278684545	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.243115748288938	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.245829142038643	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.252271809990672	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.26556026864011	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.274766138700827	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.280494376265598	relativeMedian	Female	Non-Hispanic, White	Never Smoked	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.28387181957812	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.288812414969168	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.288913370369229	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.306805626848176	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.307602745755005	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.310339749123965	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.312187399326876	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.312835435448475	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.316622757117983	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.318473128090523	relativeMedian	Female	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.319276945197812	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.324430130929841	relativeMedian	Female	Black/Africian American	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.328328412540505	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.330672778387135	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.330689872280962	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.342012597052924	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.343399248634465	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.345940745764013	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.347227603694868	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.352591719167509	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.353835617249471	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.357882608311398	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.358978261349696	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.359107923292122	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.360366878803835	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.360526690934499	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.363246883363819	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.3646231222748	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.368256659360785	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.368670699143878	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.371944591787813	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.374288139665402	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.37472947430264	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.375070818633844	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.375548932295214	relativeMedian	Female	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.377641134475007	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.378582056567298	relativeMedian	Female	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.38133783430931	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.383790237348756	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.384483403361528	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.392191188441479	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.393938910464206	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.394295015890241	relativeMedian	Male	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.39483548256282	relativeMedian	Female	Non-Hispanic, White	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.395841263646803	relativeMedian	Female	Black/Africian American	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.401686560608044	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.406349569763227	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.40743391007209	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.408143503910774	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.409786366818768	relativeMedian	Female	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.412702218403601	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.416284174251792	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.417414129182142	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.41813759425225	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.421535057513959	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.422653676596119	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.423170595322658	relativeMedian	Female	Non-Hispanic, White	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.42486630831801	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.425690269938202	relativeMedian	Female	Black/Africian American	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.427589145537509	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.42991458492775	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.43212127367833	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.432122547468372	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.434714460733353	relativeMedian	Female	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.434816211457713	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.438050049441538	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.440369878178026	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.445193235488294	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.446830533932894	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.447835372291375	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.451130515626648	relativeMedian	Male	Black/Africian American	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.451955110310789	relativeMedian	Female	Non-Hispanic, White	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.454324290197386	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.455283674629005	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.457548965353993	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.459406236711035	relativeMedian	Male	Black/Africian American	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.45941265339322	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.459507503849244	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.460090110102218	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.461034706341676	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.461945902154145	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.46255783432987	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.464829947321971	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.464984009626462	relativeMedian	Male	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.467254938451202	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.470462861740202	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.470534864903412	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.471934069915932	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.473642363362935	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.476691738195607	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.477781681283876	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.477930197223511	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.47895143689527	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.479311082964914	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.480560442315531	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.48532702746794	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.486762190041911	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.488243219095157	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.488261802747181	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.492066908541862	relativeMedian	Female	Non-Hispanic, White	Never Smoked	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.492183362011674	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.492379884986324	relativeMedian	Female	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.49268081438893	relativeMedian	Male	Non-Hispanic, White	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.49485120209971	relativeMedian	Female	Black/Africian American	NA	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.49752186408208	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.49851973406362	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.501414324894128	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.503369697319183	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.504768440764786	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.506649566655547	relativeMedian	Female	Non-Hispanic, White	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.508497962935295	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.509199856694571	relativeMedian	Male	Non-Hispanic, White	Never Smoked	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.509563679326541	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.510399302031096	relativeMedian	Male	Black/Africian American	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.511008362318803	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.516495942908018	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.516728483235384	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.516987625585498	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.52010052211892	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.522871508362736	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.523030271934808	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.525184231881723	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.525389868146563	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.525711119097767	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.528195441090624	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.528709081626925	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.533015020601996	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.534347143830513	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.534938099068791	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.539136999475959	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.540590579954606	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.540702294735701	relativeMedian	Male	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.541122283961186	relativeMedian	Female	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.542167650381686	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.54629317980279	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.546789197133638	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.547899378801879	relativeMedian	Male	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.548765594712652	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.549408597508442	relativeMedian	Male	Non-Hispanic, White	Never Smoked	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.55006841182345	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.551589287168448	relativeMedian	Female	Black/Africian American	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.552705350293615	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.553377755957679	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.553479856745733	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.553889433858375	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.553908591608316	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.557848910721214	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.559386201016227	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.560836995121198	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.561050375542963	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.562349845370351	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.563137468527484	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.563734407384673	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.56578476587833	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.567974492674474	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.569510925922701	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.571295708005525	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.571520125136348	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.57249185043061	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.576241790378013	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.57786323262014	relativeMedian	Male	Black/Africian American	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.578657001608138	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.579209441565456	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.58122130776941	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.581434455916109	relativeMedian	Female	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.582942783076855	relativeMedian	Female	Non-Hispanic, White	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.583208197530288	relativeMedian	Female	Black/Africian American	Current Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.585466354609589	relativeMedian	Female	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.587181910740839	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.587196604510024	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.588343843515916	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.591597016002502	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.592148433824985	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.592430905992398	relativeMedian	Female	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.595465085140994	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.595797672547786	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.597424829454656	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.599627269339776	relativeMedian	Male	Non-Hispanic, White	Former Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.600003377244085	relativeMedian	Male	Non-Hispanic, White	Current Smoker	UIA
Reversed phase NEGATIVE ION MODE	alpha-ketobutyrate	0.600061439244418	relativeMedian	Male	Non-Hispanic, White	Former Smoker	NJC

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