ABSTRACT
ABSTRACT Objective: To compare patients with chronic hypersensitivity pneumonitis (cHP) and controls with normal spirometry in terms of their sleep characteristics, as well as to establish the prevalence of obstructive sleep apnea (OSA) and nocturnal hypoxemia. Secondary objectives were to identify factors associated with OSA and nocturnal hypoxemia; to correlate nocturnal hypoxemia with the apnea-hypopnea index (AHI) and lung function, as well as with resting SpO2, awake SpO2, and SpO2 during exercise; and to evaluate the discriminatory power of sleep questionnaires to predict OSA. Methods: A total of 40 patients with cHP (cases) were matched for sex, age, and BMI with 80 controls, the ratio of controls to cases therefore being = 2:1. The STOP-Bang questionnaire, the Epworth Sleepiness Scale (ESS), the Pittsburgh Sleep Quality Index, the Berlin questionnaire and the Neck circumference, obesity, Snoring, Age, and Sex (NoSAS) score were applied to all cases, and both groups underwent full-night polysomnography. Results: The patients with cHP had longer sleep latency, lower sleep efficiency, a lower AHI, a lower respiratory disturbance index, fewer central apneas, fewer mixed apneas, and fewer hypopneas than did the controls. The patients with cHP had significantly lower nocturnal SpO2 values, the percentage of total sleep time spent below an SpO2 of 90% being higher than in controls (median = 4.2; IQR, 0.4-32.1 vs. median = 1.0; IQR, 0.1-5.8; p = 0.01). There were no significant differences between cases with and without OSA regarding the STOP-Bang questionnaire, NoSAS, and ESS scores. Conclusions: The prevalence of OSA in cHP patients (cases) was high, although not higher than that in controls with normal spirometry. In addition, cases had more hypoxemia during sleep than did controls. Our results suggest that sleep questionnaires do not have sufficient discriminatory power to identify OSA in cHP patients.
RESUMO Objetivo: Comparar pacientes com pneumonite de hipersensibilidade crônica (PHc) e controles com espirometria normal quanto às características do sono, bem como estabelecer a prevalência de apneia obstrutiva do sono (AOS) e hipoxemia noturna. Os objetivos secundários foram identificar fatores associados à AOS e hipoxemia noturna; correlacionar a hipoxemia noturna com o índice de apneias e hipopneias (IAH), função pulmonar, SpO2 em repouso, SpO2 em vigília e SpO2 durante o exercício; e avaliar o poder discriminatório de questionários do sono para predizer AOS. Métodos: Um total de 40 pacientes com PHc (casos) foram emparelhados por sexo, idade e IMC com 80 controles (2:1). O questionário STOP-Bang, a Escala de Sonolência de Epworth (ESE), o Índice de Qualidade do Sono de Pittsburgh, o questionário de Berlim e o escore Neck circumference, obesity, Snoring, Age, and Sex (NoSAS, circunferência do pescoço, obesidade, ronco, idade e sexo) foram aplicados a todos os casos, e ambos os grupos foram submetidos a polissonografia de noite inteira. Resultados: Os pacientes com PHc apresentaram maior latência do sono, menor eficiência do sono, menor IAH, menor índice de distúrbio respiratório, menos apneias centrais, menos apneias mistas e menos hipopneias do que os controles. Os pacientes com PHc apresentaram SpO2 noturna significativamente menor; a porcentagem do tempo total de sono com SpO2 < 90% foi maior que nos controles (mediana = 4,2; IIQ: 0,4-32,1 vs. mediana = 1,0; IIQ: 0,1-5,8; p = 0,01). Não houve diferenças significativas entre os casos com e sem AOS quanto à pontuação no questionário STOP-Bang, no NoSAS e na ESE. Conclusões: A prevalência de AOS em pacientes com PHc (casos) foi alta, embora não tenha sido maior que a observada em controles com espirometria normal. Além disso, os casos apresentaram mais hipoxemia durante o sono do que os controles. Nossos resultados sugerem que os questionários do sono não têm poder discriminatório suficiente para identificar AOS em pacientes com PHc.
ABSTRACT
Abstract The characteristics of non-obese patients with mild to moderate Obstructive Sleep Apnea Syndrome (OSAS) who will present with a good response to Mandibular Repositioning Appliance (MRA) treatment have not yet been well established in the literature. The aim of this study is to assess whether polysomnographic (PSG), demographic, anthropometric, cephalometric, and otorhinolaryngological parameters predict MRA success in the treatment of OSAS. Forty (40) males with mild and moderate OSAS were assessed pretreatment and 2-months post-treatment after wearing an MRA. Demographic, anthropometric, otorhinolaryngological (ENT), cephalometric, and polysomnographic parameters, including continuous positive airway pressure (CPAP) titrated pressure, dental models, Epworth Sleepiness Scale, quality of life (Short Form SF-36), and mood state (Profile of Mood States – POMS), were assessed. The responders exhibited fewer oropharyngeal alterations, increased upper pharyngeal space, reduced lower airway space, and increased mandibular intercanine width, and they had milder disease. Nevertheless, no predictive factors of MRA success could be found. MRA was more successful among men with a more pervious airway, a larger interdental width and milder OSAS. However, a combined [1] functional and structural assessment is needed to successfully predict the [2] effectiveness of MRA treatment of OSA.
Subject(s)
Humans , Male , Adult , Middle Aged , Aged , Mandibular Advancement/instrumentation , Mandibular Advancement/methods , Sleep Apnea, Obstructive/therapy , Anatomic Landmarks , Body Mass Index , Cephalometry , Continuous Positive Airway Pressure/methods , Linear Models , Orthodontic Appliances , Pharynx , Polysomnography , Prospective Studies , Quality of Life , Reference Values , Reproducibility of Results , Risk Factors , Statistics, Nonparametric , Surveys and Questionnaires , Treatment OutcomeABSTRACT
Abstract Objective: Sleep deprivation in adolescents has lately become a health issue that tends to increase with higher stress prevalence, extenuating routines, and new technological devices that impair adolescents' bedtime. Therefore, this study aimed to assess the excessive sleepiness frequency and the factors that might be associated to it in this population. Methods: The cross-sectional study analyzed 531 adolescents aged 10–18 years old from two private schools and one public school. Five questionnaires were applied: the Cleveland Adolescent Sleepiness Questionnaire; the Sleep Disturbance Scale for Children; the Brazilian Economic Classification Criteria; the General Health and Sexual Maturation Questionnaire; and the Physical Activity Questionnaire. The statistical analyses were based on comparisons between schools and sleepiness and non-sleepiness groups, using linear correlation and logistic regression. Results: Sleep deprivation was present in 39% of the adolescents; sleep deficit was higher in private school adolescents (p < 0.001), and there was a positive correlation between age and sleep deficit (p < 0.001; r = 0.337). Logistic regression showed that older age (p = 0.002; PR: 1.21 [CI: 1.07–1.36]) and higher score level for sleep hyperhidrosis in the sleep disturbance scale (p = 0.02; PR: 1.16 [CI: 1.02–1.32]) were risk factors for worse degree of sleepiness. Conclusions: Sleep deficit appears to be a reality among adolescents; the results suggest a higher prevalence in students from private schools. Sleep deprivation is associated with older age in adolescents and possible presence of sleep disorders, such as sleep hyperhidrosis.
Resumo Objetivo: A privação de sono na adolescência é um importante problema de saúde na atualidade e só tende a se agravar com o aumento do estresse, da rotina extenuante e do advento de novos aparelhos tecnológicos que parecem refletir negativamente no início do sono em adolescentes. O estudo objetiva avaliar a frequência da sonolência excessiva e quais fatores podem estar associados a ela nessa população. Métodos: O estudo transversal avaliou 531 adolescentes de 10 a 18 anos em duas escolas de ensino privado e uma de ensino público e aplicou para cada adolescente cinco questionários: Cleveland Adolescent Sleepiness Questionnaire; Sleep Disturbance Scale for Children; Critério de Classificação Econômica Brasil; Questionário Geral de Saúde e Maturação Sexual; Questionário de Atividade Física. Fizeram-se comparações entre as escolas e entre grupos com e sem sonolência por meio de correlação linear e regressão logística. Resultados: Observou-se privação de sono em 39% dos adolescentes, débito de sono maior para escolares do ensino privado (p < 0,001) e correlação positiva entre idade e débito do sono (p < 0,001; r = 0,337). Na regressão logística, apontaram-se como fatores para pior grau de sonolência maior faixa etária dos escolares (p = 0,002; RP: 1,21 [IC: 1,07-1,36]) e maior escore na variável hiperidrose do sono do questionário de distúrbios do sono (p = 0,02; RP: 1,16 [IC: 1,02-1,32]). Conclusões: O déficit de sono é uma realidade na população estudada e apresenta-se pior em escolares do ensino privado. A privação de sono está relacionada com a maior faixa etária dos adolescentes e possível presença de distúrbios do sono, como a hiperidrose do sono.
Subject(s)
Humans , Male , Female , Child , Adolescent , Disorders of Excessive Somnolence/etiology , Brazil/epidemiology , Prevalence , Cross-Sectional Studies , Risk Factors , Disorders of Excessive Somnolence/epidemiologyABSTRACT
OBJECTIVE: To determine the therapeutic effects of two selective GABA-A agonists, zopiclone and eszopiclone, in the treatment of insomnia. METHODS: This study comprised a phase III, single-center, randomized, double-blind, double-dummy, parallel-group, non-inferiority trial. Patients were randomized to receive zopiclone 7.5 mg or eszopiclone 3 mg, both orally, for four weeks. In total, 199 patients were evaluated during two visits and then followed for at least six weeks. The primary endpoint was the Insomnia Severity Index after four weeks of treatment. Secondary endpoints were obtained through polysomnography data, including total sleep time, sleep latency and sleep efficiency. The frequency of adverse events was also analyzed. ClinicalTrials.gov: NCT01100164. RESULTS: The primary efficacy analysis demonstrated the non-inferiority of eszopiclone over zopiclone. Analysis of objective parameters assessed by polysomnography showed that eszopiclone increased total sleep time and also improved sleep efficiency. The safety profile of both study treatments was similar and the most common events reported in both groups were dysgeusia, headache, dizziness, irritability and nausea. Adverse events were observed in 223 patients, 109 (85.2%) in the eszopiclone group and 114 (87.7%) in the zopiclone group. CONCLUSION: Based on the Insomnia Severity Index at the end of four weeks of treatment, eszopiclone demonstrated efficacy comparable to that of zopiclone in the treatment of insomnia, increasing total sleep time as well as sleep efficiency according to polysomnography.
Subject(s)
Adult , Female , Humans , Male , Middle Aged , Young Adult , Azabicyclo Compounds/therapeutic use , Eszopiclone/therapeutic use , Hypnotics and Sedatives/therapeutic use , Piperazines/therapeutic use , Sleep Initiation and Maintenance Disorders/drug therapy , Azabicyclo Compounds/adverse effects , Double-Blind Method , Dysgeusia/chemically induced , Eszopiclone/adverse effects , Headache/chemically induced , Hypnotics and Sedatives/adverse effects , Polysomnography , Piperazines/adverse effects , Treatment OutcomeABSTRACT
ABSTRACT INTRODUCTION: The mandibular advancement device (MAD) is a option to treat patients with Obstructive Sleep Apnea Syndrome (OSAS). OBJECTIVE: To assess the influence of upper airway abnormalities on the success of and adherence to MAD in patients with OSAS. METHODS: Prospective study with 30 patients with mild to moderate OSAS and indications for MAD. The protocol included questionnaires addressing sleep and nasal complaints, polysomnography, and upper airway assessment. The analyzed parameters of patients who showed therapeutic success and failure and those who exhibited good and poor treatment adherence were compared. RESULTS: 28 patients completed the protocol; 64.3% responded successfully to treatment with MAD, and 60.7% exhibited good adherence to treatment. Factors associated with greater success rates were younger age (p = 0.02), smaller cervical circumference (p = 0.05), and lower AHI at baseline (p = 0.05). There was a predominance of patients without nasal abnormalities among patients treated successfully compared to those with treatment failure (p = 0.04), which was not observed in relation to adherence. Neither pharyngeal nor facial skeletal abnormalities were significantly associated with either therapeutic success or adherence. CONCLUSION: MAD treatment success was significantly lower among patients with nasal abnormalities; however, treatment adherence was not influenced by the presence of upper airway or facial skeletal abnormalities.
RESUMO INTRODUÇÃO: O Aparelho Intraoral (AIO) é uma opção para tratamento da Síndrome da Apneia Obstrutiva do Sono (SAOS). OBJETIVOS: Avaliar a influência das alterações da VAS e esqueléticas faciais através de uma avaliação clinica sistematizada no sucesso e adesão ao (AIO) em pacientes com (SAOS). MÉTODO: Estudo prospectivo em que foram avaliados 30 pacientes com SAOS leve a moderada e indicação de AIO. Protocolo incluiu questionários de sono e queixas nasais; polissonografia e avaliação da VAS por rinoscopia anterior e oroscopia. Os parâmetros analisados foram comparados entre pacientes com sucesso e insucesso, e com boa e má adesão à terapia. RESULTADOS: Completaram o protocolo 28 pacientes. O sucesso ao tratamento foi de 64,3% e a adesão 60,7%. Os fatores associados ao sucesso foram menor idade, menor circunferência cervical e menor IAH basal. Quanto à presença de alterações nasais, houve predomínio de pacientes sem alteração nasal entre os pacientes com sucesso comparados àqueles com insucesso (p = 0,04); o que não foi observado em relação à adesão. Quanto às alterações faríngeas e alterações esqueléticas faciais, não houve significância. CONCLUSÃO: O sucesso do tratamento com AIO foi significativamente menor nos pacientes com alterações nasais, porém a adesão não foi influenciada pela presença de alterações de VAS ou esqueléticas faciais.
Subject(s)
Adult , Aged , Female , Humans , Male , Middle Aged , Mandibular Advancement/instrumentation , Sleep Apnea, Obstructive/therapy , Cephalometry , Polysomnography , Prospective Studies , Surveys and Questionnaires , Treatment OutcomeABSTRACT
Introduction: The success of pharyngeal surgery in the treatment of obstructive sleep apnea syndrome depends on the appropriate selection of patients. Objective: To propose a new staging for indication of pharyngeal surgery in obstructive sleep apnea syndrome. Methods: A total of 54 patients undergoing extended tonsillectomy were retrospectively included, divided into six stages. Stage I: patients with palatine tonsils grade 3/4 and modified Mallampati index 1/2; stage II: palatine tonsils 3/4 and modified Mallampati index 3/4; stage III: palatine tonsils 1/2 and modified Mallampati index 1/2; stage IV: palatine tonsils 1/2 and modified Mallampati index 3/4; stage V: body mass index ≥40 kg/m2 with palatine tonsils 3/4 and modified Mallampati index 1, 2, 3, or 4. Stage VI: body mass index ≥40 with palatine tonsils 1/2 and modified Mallampati index 1, 2, 3, or 4. Results: The surgical success rates were 88.9%, 75.0%, 35.7%, 38.5%, and 100.0% in stages I–V. Conclusion: The presence of hypertrophic palatine tonsils was the anatomical factor in common in the most successful stages (I, II, and V), regardless of body mass index. Although the modified Mallampati index classes 3 and 4 reduced the success rate of surgery in patients with hypertrophic tonsils (stage II), the presence of modified Mallampati index classes 1 and 2 did not favor surgical success in patients with normal tonsils (stage III). .
Introdução: O sucesso da cirurgia faríngea no tratamento da síndrome da apneia obstrutiva do sono (SAOS) depende da adequada seleção de pacientes. Objetivo: Propor um novo estadiamento para indicação de cirurgia faríngea na SAOS. Método: Estudo retrospectivo, onde foram inclusos, 54 pacientes submetidos a amigdalectomia ampliada, divididos em 6 estádios. Estádio I: pacientes com tonsilas palatinas graus 3/4 e índice de Mallampati modificado (IMM) 1/2; Estádio II: tonsilas palatinas 3/4 e IMM 3/4; Estádio III: tonsilas palatinas 1/2 e IMM 1/2; Estádio IV: tonsilas palatinas 1/2 e IMM 3/4; Estádio V: IMC (índice de massa corpórea) ≥ com tonsilas palatinas 3/4 e IMM 1, 2, 3 ou 4. Estádio VI: IMC ≥ kg/m2 com tonsilas palatinas 1 ou 2 e IMM 1, 2, 3, ou 4. Resultados: As taxas de sucesso cirúrgico foram de 88,9%; 75,0%; 35,7%; 38,5% e 100,0% nos estádios I a V. Conclusão: A presença de tonsilas palatinas hipertróficas foi o fator anatômico em comum nos estádios de maior sucesso (I, II e V), independente do IMC. Apesar do IMM classe III e IV diminuir a taxa de sucesso da cirurgia em pacientes com tonsilas hipertróficas (estádio II), a presença de IMM classe I e II não favoreceu o sucesso cirúrgico em pacientes com tonsilas normotróficas (estádio III). .
Subject(s)
Adult , Female , Humans , Male , Middle Aged , Young Adult , Palatine Tonsil/surgery , Sleep Apnea, Obstructive/surgery , Polysomnography , Palatine Tonsil/pathology , Retrospective Studies , Severity of Illness Index , Sleep Apnea, Obstructive/classification , Tonsillectomy , Treatment OutcomeABSTRACT
OBJETIVOS: Avaliar a frequência dos distúrbios do sono, como apneia obstrutiva do sono, síndrome das pernas inquietas e insônia, em pacientes na pós-menopausa com sobrepeso/obesidade no ambulatório de distúrbios do sono no climatério. MÉTODOS: Foram selecionadas 34 pacientes na pós-menopausa, e os seguintes critérios de inclusão foram adotados: idade entre 50 e 70 anos, mínimo de 12 meses de amenorreia, Índice de Massa Corporal igual ou superior a 25 kg/m2, pacientes com queixas relacionadas ao sono e que tivessem sido submetidas a pelo menos uma polissonografia. As pacientes responderam a seis questionários sobre características do sono e sintomas do climatério e uso de medicações. Foram aferidos o peso e a altura em balança padronizada e as medidas das circunferências do abdome e do quadril. Para a análise estatística, o teste do χ2 foi utilizado para variáveis qualitativas, e o teste t de Student, para análise das variáveis quantitativas. RESULTADOS: A média de idade foi de 60,3 anos, o Índice de Massa Corporal médio de 31,6, o tempo de pós-menopausa médio de 11,6 anos e o Índice Menopausal de Kupperman médio de 19. Da amostra, 85,2% apresentou relação cintura/quadril igual ou superior a 0,8; metade apresentou escore igual ou superior a 9 na Escala de Epworth; 68% apresentou distúrbio do sono de acordo com o índice de Pittsburgh e 68% dos casos foram classificados como de alto risco para apneia do sono pelo Questionário Berlin. Na polissonografia, 70,5% apresentou eficiência do sono menor que 85%; 79,4% com latência do sono menor que 30 min; 58,8% com latência para sono REM menor que 90 min e 44,1% com apneia leve. Comparando os grupos, houve associação linear média entre IMC e IAH e relação ...
PURPOSE: To evaluate the frequency of sleep disorders, such as obstructive sleep apnea, restless leg syndrome and insomnia in overweight/obese postmenopausal women seen in a climacteric sleep disorders clinic. METHODS: Thirty-four postmenopausal women were selected using the following inclusion criteria: age between 50 and 70 years; at least 12 months of amenorrhea; body mass index (BMI) greater than or equal to 25 kg/m2; and sleep-related complaints with at least one previous polysomnography. Patients provided responses to 6 questionnaires related to sleep characteristics and menopausal symptoms. Weight and height were measured using standardized scales, and abdomen and hip circumferences were also measured. The statistical analyses were performed using the χ2 test for qualitative variables and using Student's t-test for quantitative variables. RESULTS: Patients' characteristics were as follows: mean age of 60.35 years; mean BMI of 31.62; an average of 11.61 postmenopausal years and an average Kupperman Index of 19. A total of 85.2% of the patients had a waist/hip ratio of less than 0.8. The Epworth Scale score was greater than or equal to 9 in 50% of patients; 68% had sleep disturbances according to the Pittsburgh Index, and 68% were classified as high-risk for sleep apnea by the Berlin Questionnaire. On polysomnography, 70.58% of the patients had a sleep efficiency lower than 85%; 79.41% had a sleep latency of less than 30 min; 58.82% had a REM sleep latency of less than 90 min, and 44.11% had mild apnea. When the groups were compared, a linear association was identified between BMI and the AHI average, and a relationship between high BMI and use of drugs for thyroid treatment was found. CONCLUSION: There was a high prevalence of sleep-disordered breathing, initial insomnia, fragmented sleep, and thyroid disorders in the group with higher BMI. .
Subject(s)
Aged , Female , Humans , Middle Aged , Overweight/complications , Postmenopause , Sleep Wake Disorders/epidemiology , Sleep Wake Disorders/etiology , Cross-Sectional Studies , Obesity/complications , Surveys and QuestionnairesABSTRACT
OBJECTIVE: To determine the complications due to severe acrescentar sigla após o nome (CST). METHODS: Between 1997 and 2006, 217 patients (191 men and 26 women) were prospectively evaluated. The mean age was 36.75±1.06 years. RESULTS: Forty-five percent of the patients had medical complications. The most important risk factor was alcoholic beverage use. The most important associated injury was head trauma (HT). Patients with American Spine Injury Association (ASIA) A or B had a 2.3-fold greater relative risk of developing complications. Thirty-three patients (15.2%) died. Patients with neurological deficit had a 16.9-fold higher risk of death. There was no influence of age and time between trauma and surgery on the presence of complications. CONCLUSIONS: Of the patients, 45% had clinical complications and 7.5% had associated injuries; pneumonia was the most important complication; patient age and time between trauma and surgery did not influence the development of medical complications; neurological status was the most important factor in determining morbidity and mortality.
OBJETIVO: Identificar complicações decorrentes do trauma raquimedular cervical grave. MÉTODOS: Avaliação prospectiva de 217 pacientes (191 homens e 26 mulheres) entre 1997 e 2006, com média de idade de 36,75±1,06 anos. RESULTADOS: Houve complicações em 45% dos pacientes. O fator de risco mais importante foi ingestão de bebida alcoólica. Trauma craniano foi a associação mais frequente. Pacientes com classificação A ou B da American Spine Injury Association (ASIA) tiveram 2,3 vezes maior chance de complicações. Faleceram 33 pacientes (15,2%), sendo a chance de óbito 16,9 vezes maior naqueles com déficit neurológico. Não houve influência da idade ou do tempo decorrido entre o trauma e a cirurgia. CONCLUSÕES: Dos pacientes, 45% apresentaram complicações e 7,5% apresentaram traumas associados; pneumonia foi a principal complicação clínica; a idade dos pacientes e o tempo entre o trauma e a cirurgia não influenciaram na frequência de complicações; o status neurológico após o trauma foi o fator de risco mais importante na determinação de morbidade e mortalidade.
Subject(s)
Adult , Female , Humans , Cervical Vertebrae/injuries , Spinal Cord Injuries/complications , Prospective Studies , Risk Factors , Trauma Severity IndicesABSTRACT
Introdução: A narcolepsia é um distúrbio primário do sistema nervoso central com uma prevalência ao redor de 0.02%. A narcolepsia é caracterizada por sonolência diurna excessiva, cataplexia, alucinações hipnagógicas, paralisia do sono e fragmentação do sono. Diagnóstico: O diagnóstico da narcolepsia é estabelecido pela clínica e análise de cinco cochilos diurnos durante o teste de múltiplas latências do sono. Fisiopatologia: A fisiopatologia da narcolepsia não é totalmente esclarecida. Existem várias teorias que são discutidas. Há uma maior prevalência do alelo HLA DQB1*0602 e uma diminuição da concentração da hipocretina-1 na forma de narcolepsia associada à cataplexia. Recentemente foram descritos diferentes padrões no loco do receptor de linfócito T alfa e a presença de anticorpos específicos tribbles homolog 2 em pacientes com narcolepsia. Estes achados fortalecem a teoria imunológica. Tratamento: O tratamento da narcolepsia deve garantir a integração social e familiar podendo ser dividido em comportamental e medicamentoso. Conclusão: A narcolepsia é uma fascinante doença que integra a neurologia, a imunologia, a medicina do sono, a psiquiatria e a genética. Pacientes com narcolepsia possuem prejuízo no campo pessoal, profissional e familiar. Embora muitos avanços tenham sido feitos, a melhor ferramenta ainda é a informação para os colegas médicos e para a população em geral.
Subject(s)
Narcolepsy/diagnosis , Narcolepsy/physiopathology , Narcolepsy/therapy , Sleep Wake Disorders/diagnosis , Sleep Wake Disorders/etiology , Sleep Wake Disorders/therapyABSTRACT
OBJECTIVES: This study evaluated the effect of Continuous Positive Airway Pressure treatment on oxidative stress parameters and the quality of life of elderly patients with obstructive sleep apnea syndrome. METHODS: In total, 30 obstructive sleep apnea syndrome patients and 27 subjects without obstructive sleep apnea syndrome were included in this study. Both groups underwent quality of life and oxidative stress evaluations at baseline and after six months. Polysomnography was performed in both groups at baseline and a second time in the obstructive sleep apnea syndrome group after six months of Continuous Positive Airway Pressure treatment. All of the variables were compared between the control and obstructive sleep apnea syndrome groups in this prospective case-control study. RESULTS: The baseline concentrations of the antioxidant enzyme catalase were higher in the obstructive sleep apnea syndrome group than the control group. After Continuous Positive Airway Pressure treatment, the obstructive sleep apnea syndrome group exhibited a reduction in the level of oxidative stress, as indicated by a decrease in the level of lipid peroxidation measured by the malondialdehyde (MDA) concentration [pre: 2.7 nmol malondialdehyde/mL (95% 1.6-3.7) vs. post: 1.3 nmol MDA/mL (0.7-1.9), p<0.01]. Additionally, improvements were observed in two domains covered by the SF-36 questionnaire: functional capacity [pre: 77.4 (69.2-85.5) vs. post: 83.4 (76.9-89.9), p = 0.002] and pain [pre: 65.4 (52.8-78.1) vs. post: 77.8 (67.2-88.3), p = 0.004]. CONCLUSION: Our study demonstrated that the use of Continuous Positive Airway Pressure to treat obstructive sleep apnea syndrome in elderly patients reduced oxidative stress and improved the quality of life.