DyspneaPulmonary Disease, Chronic ObstructiveLung Diseases, ObstructiveSleep Apnea, ObstructiveForced Expiratory VolumeRespiratory Function TestsSpirometryBronchodilator AgentsVital CapacityPulmonary EmphysemaJaundice, ObstructiveExercise ToleranceLungScopolamine DerivativesSeverity of Illness IndexOxygen Inhalation TherapyAdministration, InhalationSmokingRespiratory MusclesSputumAlbuterolCholinergic AntagonistsAirway ObstructionPolysomnographyQuality of LifeIpratropiumAsthmaTreatment OutcomeInspiratory CapacityEmphysemaRespiratory InsufficiencyBronchitisAdrenal Cortex HormonesExercise TestBronchitis, ChronicAdrenergic beta-2 Receptor AgonistsRespiratory System AgentsBreathing ExercisesProspective StudiesSmokeBronchiRespiratory MechanicsRespiratory TherapyRisk FactorsPulmonary MedicineHypercapniaLung DiseasesInhalationOxygenCase-Control StudiesExpectorantsPositive-Pressure RespirationBlood Gas AnalysisWork of BreathingSleep Apnea SyndromesQuestionnairesCoughLung Volume MeasurementsNebulizers and VaporizersTime FactorsRespirationAirway ResistanceContinuous Positive Airway PressurePulmonary VentilationDyspnea, Paroxysmalalpha 1-Antitrypsin DeficiencyDouble-Blind MethodChronic DiseaseTotal Lung CapacityAcute DiseasePneumoniaRetrospective StudiesHospitalizationBronchoscopyTomography, X-Ray ComputedCross-Sectional StudiesRespiratory MucosaPulmonary Gas ExchangeDisease ProgressionExercise TherapyPrevalenceFollow-Up StudiesComorbidityHeliumAnoxiaRespiration, ArtificialNoninvasive VentilationCarbon DioxideRespiratory SystemStatistics, NonparametricDiaphragmResidual VolumeWalkingBronchiectasisEthanolaminesMetered Dose InhalersForced Expiratory Flow RatesRespiratory Tract DiseasesGlycopyrrolateBiological Markers