References
- LangenRCGoskerHRRemelsAHScholsAMTriggers and mechanisms of skeletal muscle wasting in chronic obstructive pulmonary diseaseInt J Biochem Cell Biol201345102245225623827718
- SwallowEBReyesDHopkinsonNSQuadriceps strength predicts mortality in patients with moderate to severe chronic obstructive pulmonary diseaseThorax200762211512017090575
- EngelenMPScholsAMDoesJDWoutersEFSkeletal muscle weakness is associated with wasting of extremity fat-free mass but not with airflow obstruction in patients with chronic obstructive pulmonary diseaseAm J Clin Nutr200071373373810702166
- SeymourJMSpruitMAHopkinsonNSThe prevalence of quadriceps weakness in COPD and the relationship with disease severityEur Respir J2010361818819897554
- MostertRGorisAWeling-ScheepersCWoutersEFScholsAMTissue depletion and health related quality of life in patients with chronic obstructive pulmonary diseaseRespir Med200094985986711001077
- PolkeyMIMoxhamJAttacking the disease spiral in chronic obstructive pulmonary disease: an updateClin Med2011115461464
- AlkhujaSPhysical activity in people with COPD, using the National Health and Nutrition Evaluation Survey (NHANES) dataset (2003–2006)Heart Lung201342483484
- CielenNMaesKGayan-RamirezGMusculoskeletal disorders in chronic obstructive pulmonary diseaseBiomed Res Int2014201496576424783225
- MaltaisFDecramerMCasaburiRAn official American Thoracic Society/European Respiratory Society statement: update on limb muscle dysfunction in chronic obstructive pulmonary diseaseAm J Respir Crit Care Med20141899e15e6224787074
- HuJMeekPHealth-related quality of life in individuals with chronic obstructive pulmonary diseaseHeart Lung200534641542216324961
- JonesPWBrusselleGDal NegroRWHealth-related quality of life in patients by COPD severity within primary care in EuropeRespir Med20111051576620932736
- SeymourJMWardKSidhuPSUltrasound measurement of rectus femoris cross-sectional area and the relationship with quadriceps strength in COPDThorax200964541842319158125
- BernardSLeBlancPWhittomFPeripheral muscle weakness in patients with chronic obstructive pulmonary diseaseAm J Respir Crit Care Med199815826296349700144
- PillenSvan KeimpemaMNievelsteinRASkeletal muscle ultrasonography: visual versus quantitative evaluationUltrasound Med Biol2006321315132116965971
- ReevesNDMaganarisCNNariciMVUltrasonographic assessment of human skeletal muscle sizeEur J Appl Physiol200491111611814639480
- MayansDCartwrightMSWalkerFONeuromuscular ultrasonography: quantifying muscle and nerve measurementsPhys Med Rehabil Clin N Am2012231133148xii22239880
- FukumotoYIkezoeTYamadaYSkeletal muscle quality assessed from echo intensity is associated with muscle strength of middle-aged and elderly personsEur J Appl Physiol201211241519152521847576
- JanssonSABackmanHStenlingALindbergARönmarkELundbäckBHealth economic costs of COPD in Sweden by disease severity – has it changed during a ten years period?Respir Med2013107121931193823910072
- LâmHTEkerljungLT Formula See Text NgNFRönmarkELarssonKLundbäckBPrevalence of COPD by disease severity in men and women in northern VietnamCOPD201411557558124867392
- LindbergASawalhaSHedmanLLarssonLGLundbäckBRönmarkESubjects with COPD and productive cough have an increased risk for exacerbations and deathRespir Med20151091889525528948
- LindbergALundbackBThe obstructive lung disease in Northern Sweden chronic obstructive pulmonary disease study: design, the first year participation and mortalityClin Respir J20082suppl 1647120298352
- Standardization of Spirometry, 1994 update. American Thoracic SocietyAm J Respir Crit Care Med1995152110711367663792
- ATS Committee on Proficiency Standards for Clinical Pulmonary Function LaboratoriesATS statement: guidelines for the six-minute walk testAm J Respir Crit Care Med200216611111712091180
- Baghai-RavaryRQuintJKGoldringJJHurstJRDonaldsonGCWedzichaJADeterminants and impact of fatigue in patients with chronic obstructive pulmonary diseaseRespir Med2009103221622319027278
- StridsmanCLindbergASkarLFatigue in chronic obstructive pulmonary disease: a qualitative study of people’s experiencesScand J Caring Sci201428113013823517049
- WebsterKCellaDYostKThe functional assessment of chronic illness therapy (FACIT) Measurement System: properties, applications, and interpretationHealth Qual Life Outcomes200317914678568
- ArtsIMPillenSSchelhaasHJOvereemSZwartsMJNormal values for quantitative muscle ultrasonography in adultsMuscle Nerve2010411324119722256
- CartwrightMSKwayisiGGriffinLPQuantitative neuromuscular ultrasound in the intensive care unitMuscle Nerve201347225525923041986
- PillenSvan DijkJPWeijersGRaijmannWde KorteCLZwartsMJQuantitative gray-scale analysis in skeletal muscle ultrasound: a comparison study of two ultrasound devicesMuscle Nerve200939678178619301363
- ShrikrishnaDPatelMTannerRJQuadriceps wasting and physical inactivity in patients with COPDEur Respir J2012401115112222362854
- MathurSBrooksDCarvalhoCRStructural alterations of skeletal muscle in copdFront Physiol2014510424678302
- ShieldsGSCoissiGSJimenez-RoyoPBioenergetic abnormalities and intermuscular fat in chronic obstructive pulmonary disease (COPD)-associated quadriceps weaknessMuscle Nerve201551221422124831173
- MaddocksMShrikrishnaDVitorianoSSkeletal muscle adiposity is associated with physical activity, exercise capacity and fibre shift in COPDEur Respir J20144451188119824993908
- PillenSvan AlfenNZwartsMJMuscle ultrasound: a grown-up technique for children with neuromuscular disordersMuscle Nerve2008381213121418642384
- GdyniaHJMüllerHPLudolphACKöningerHHuberRQuantitative muscle ultrasound in neuromuscular disorders using the parameters ‘intensity’, ‘entropy’, and ‘fractal dimension’Eur J Neurol200916101151115819486136
- RechARadaelliRGoltzFRda RosaLHSchneiderCDPintoRSEcho intensity is negatively associated with functional capacity in older womenAge (Dordr)2014365970825167965
- PillenSTakROZwartsMJSkeletal muscle ultrasound: correlation between fibrous tissue and echo intensityUltrasound Med Biol20093544344619081667
- JansenMvan AlfenNNijhuis van der SandenMWvan DijkJPPillenSde GrootIJQuantitative muscle ultrasound is a promising longitudinal follow-up tool in Duchenne muscular dystrophyNeuromuscul Disord201222430631722133654
- LefanteJJJrHarmonGNAshbyKMBarnardDWebberLSUse of the SF-8 to assess health-related quality of life for a chronically ill, low-income population participating in the Central Louisiana Medication Access Program (CMAP)Qual Life Res200514366567316022060
- StahlELindbergAJanssonSAHealth-related quality of life is related to COPD disease severityHealth Qual Life Outcomes200535616153294
- de TorresJPCasanovaCHernandezCGender associated differences in determinants of quality of life in patients with COPD: a case series studyHealth Qual Life Outcomes200647217007639
- Di MarcoFVergaMReggenteMAnxiety and depression in COPD patients: the roles of gender and disease severityRespir Med2006100101767177416531031
- GuyattGHBermanLBTownsendMPugsleySOChambersLWA measure of quality of life for clinical trials in chronic lung diseaseThorax198742107737783321537
- LewkoABidgoodPLGarrodREvaluation of psychological and physiological predictors of fatigue in patients with COPDBMC Pulm Med200994719845947
- BargfredeMSchwennickeATumaniHReimersCDQuantitative ultrasonography in focal neuropathies as compared to clinical and EMG findingsEur J Ultrasound1999101212910502636
- WatanabeYYamadaYFukumotoYEcho intensity obtained from ultrasonography images reflecting muscle strength in elderly menClin Interv Aging2013899399823926426