Continuous Positive Airway Pressure Treatment Does not Reduce Uric Acid Levels in OSA Women / La presión positiva continua en las vías aéreas no reduce los niveles de ácido úrico en las mujeres con SAOS

Objectives: Although an association between uric acid (UA) levels and obstructive sleep apnea (OSA) has been reported, the effect of continuous positive airway pressure (CPAP) on this measure is yet unclear. We aimed to investigate the effect of CPAP therapy on serum UA levels in patients with OSA. Methods: We conducted a multicenter, open-label, randomized controlled trial in 307 women diagnosed with moderate-to-severe OSA (apnea-hypopnea index [AHI] ≥ 15) in 19 Spanish Sleep Units. Women were randomized to CPAP (n = 151) or conservative treatment (n = 156) for 12 weeks. Changes in serum UA measures were assessed on an intention-to-treat basis. Additional analyses were conducted in the subgroup of women with CPAP adherence ≥ 4 h/night and those with UA levels ≥ 6 mg/dl. Results: Women had a mean (SD) age of 57.1 (10.1) years, median (first-third quartile) body mass index of 33.7 (29.0-38.5) mg/kg2 and AHI of 32.0 (22.6-48.5). The average serum UA measure was 5.11 (1.26) mg/dl, and 80 (26.1%) participants had UA ≥ 6 mg/dl. Compared with the control group, the CPAP group did not achieve any reduction in UA levels (non-adjusted intergroup difference -0.03mg/dl, 95%CI -0.20 to 0.13; p = 0.702) after 12 weeks of follow-up. These results did not change when the analysis was restricted to women with CPAP adherence ≥4 h/night, or the subgroup of women with hyperuricemia. Conclusions: Twelve weeks of CPAP therapy does not reduce UA levels compared to conservative treatment in women with moderate-to-severe OSA

Objetivos: Aunque se ha determinado una asociación entre los niveles de ácido úrico (AU) y el síndrome de apnea obstructiva del sueño (SAOS), el efecto de la presión positiva continua en las vías aéreas (CPAP) en esta medida todavía no está claro. El objetivo fue determinar el efecto de la CPAP en los niveles séricos de AU en pacientes con SAOS. Métodos: Se llevó a cabo un ensayo abierto, aleatorizado, controlado, multicéntrico en 307 mujeres diagnosticadas con SAOS de moderado a grave (índice de apneas-hipopneas [IAH]≥15) en 19 unidades del sueño españolas. Fueron aleatorizadas a recibir CPAP (n=151) o tratamiento conservador (n=156) durante 12 semanas. Los cambios en las medidas de AU sérico se estimaron mediante análisis por intención de tratar. Se llevaron a cabo análisis adicionales en el subgrupo de mujeres con adherencia a CPAP ≥ 4 h/noche y en aquellas con niveles de AU ≥ 6mg/dl. Resultados: La edad media (DE) de las participantes fue 57,1 (10,1) años, la mediana (primer y tercer cuartil) del índice de masa corporal 33,7 (29,0-38,5) mg/kg2 y el IAH 32,0 (22,6-48,5). El nivel medio de AU fue 5,11 (1,26) mg/dl, y 80 (26,1%) participantes tuvieron AU≥6mg/dl. Comparado con el grupo control, el grupo CPAP no consiguió ninguna reducción de los niveles de AU (diferencia intergrupo no ajustada: -0,03 mg/dl; IC 95%: -0,20-0,13; p= 0,702) tras 12 semanas de seguimiento. El análisis no varió cuando se restringió a las mujeres con adherencia a CPAP ≥ 4h/noche o al subgrupo de mujeres con hiperuricemia. Conclusiones: Doce semanas de terapia con CPAP no reducen los niveles de AU en comparación con el tratamiento conservador en mujeres con SAOS de moderado a grave

Continuous Positive Airway Pressure Treatment Does not Reduce Uric Acid Levels in OSA Women.

OBJECTIVES: Although an association between uric acid (UA) levels and obstructive sleep apnea (OSA) has been reported, the effect of continuous positive airway pressure (CPAP) on this measure is yet unclear. We aimed to investigate the effect of CPAP therapy on serum UA levels in patients with OSA. METHODS: We conducted a multicenter, open-label, randomized controlled trial in 307 women diagnosed with moderate-to-severe OSA (apnea-hypopnea index [AHI]≥15) in 19 Spanish Sleep Units. Women were randomized to CPAP (n=151) or conservative treatment (n=156) for 12 weeks. Changes in serum UA measures were assessed on an intention-to-treat basis. Additional analyses were conducted in the subgroup of women with CPAP adherence ≥4h/night and those with UA levels ≥6mg/dl. RESULTS: Women had a mean (SD) age of 57.1 (10.1) years, median (first-third quartile) body mass index of 33.7 (29.0-38.5) mg/kg2 and AHI of 32.0 (22.6-48.5). The average serum UA measure was 5.11 (1.26) mg/dl, and 80 (26.1%) participants had UA≥6mg/dl. Compared with the control group, the CPAP group did not achieve any reduction in UA levels (non-adjusted intergroup difference -0.03mg/dl, 95%CI -0.20 to 0.13; p=0.702) after 12 weeks of follow-up. These results did not change when the analysis was restricted to women with CPAP adherence ≥4h/night, or the subgroup of women with hyperuricemia. CONCLUSIONS: Twelve weeks of CPAP therapy does not reduce UA levels compared to conservative treatment in women with moderate-to-severe OSA.

Effect of continuous positive airway pressure on blood pressure and metabolic profile in women with sleep apnoea.

Continuous positive airway pressure (CPAP) reduces blood pressure levels in hypertensive patients with obstructive sleep apnoea (OSA). However, the role of CPAP in blood pressure and the metabolic profile in women has not yet been assessed. In this study we investigated the effect of CPAP on blood pressure levels and the glucose and lipid profile in women with moderate-to-severe OSA.A multicentre, open-label, randomised controlled trial was conducted in 307 women diagnosed with moderate-to-severe OSA (apnoea-hypopnoea index ≥15 events·h-1) in 19 Spanish Sleep Units. Women were randomised to CPAP (n=151) or conservative treatment (n=156) for 12 weeks. Changes in office blood pressure measures as well as in the glucose and lipid profile were assessed in both groups.Compared with the control group, the CPAP group achieved a significantly greater decrease in diastolic blood pressure (-2.04 mmHg, 95% CI -4.02- -0.05; p=0.045), and a nonsignificantly greater decrease in systolic blood pressure (-1.54 mmHg, 95% CI -4.58-1.51; p=0.32) and mean blood pressure (-1.90 mmHg, 95% CI -4.0-0.31; p=0.084). CPAP therapy did not change any of the metabolic variables assessed.In women with moderate-to-severe OSA, 12 weeks of CPAP therapy improved blood pressure, especially diastolic blood pressure, but did not change the metabolic profile, compared with conservative treatment.

Continuous Positive Airway Pressure Improves Quality of Life in Women with Obstructive Sleep Apnea. A Randomized Controlled Trial.

RATIONALE: Continuous positive airway pressure (CPAP) is the treatment of choice in patients with symptomatic obstructive sleep apnea (OSA). CPAP treatment improves quality of life (QoL) in men with OSA, but its role in women has not yet been assessed. OBJECTIVES: To investigate the effect of CPAP on QoL in women with moderate to severe OSA. METHODS: We conducted a multicenter, open-label randomized controlled trial in 307 consecutive women diagnosed with moderate to severe OSA (apnea-hypopnea index, ≥15) in 19 Spanish sleep units. Women were randomized to receive effective CPAP therapy (n = 151) or conservative treatment (n = 156) for 3 months. The primary endpoint was the change in QoL based on the Quebec Sleep Questionnaire. Secondary endpoints included changes in daytime sleepiness, mood state, anxiety, and depression. Data were analyzed on an intention-to-treat basis with adjustment for baseline values and other relevant clinical variables. MEASUREMENTS AND MAIN RESULTS: The women in the study had a mean (SD) age of 57.1 (10.1) years and a mean (SD) Epworth Sleepiness Scale score of 9.8 (4.4), and 77.5% were postmenopausal. Compared with the control group, the CPAP group achieved a significantly greater improvement in all QoL domains of the Quebec Sleep Questionnaire (adjusted treatment effect between 0.53 and 1.33; P < 0.001 for all domains), daytime sleepiness (-2.92; P < 0.001), mood state (-4.24; P = 0.012), anxiety (-0.89; P = 0.014), depression (-0.85; P = 0.016), and the physical component summary of the 12-item Short Form Health Survey (2.78; P = 0.003). CONCLUSIONS: In women with moderate or severe OSA, 3 months of CPAP therapy improved QoL, mood state, anxiety and depressive symptoms, and daytime sleepiness compared with conservative treatment. Clinical trial registered with www.clinicaltrials.gov (NCT02047071).