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[Clinical features of obstructive sleep apnea syndrome in patients with acromegaly]
U A Tsoy1, Yu V Sviryaev1, L S Korostovtseva1
1V.A. Almazov Federal Medical Research Center, Ministry of Health of Russia, Saint Petersburg, Russia.
Aim:
To investigate the incidence of sleep-related breathing disorders (SRBDs) in patients with active acromegaly (AM), to specify risk factors influencing apnea/hypopnea index (AHI), and to reveal the specific features of obstructive sleep apnea (OSA) in patients with AM versus those with OSA without AM.
Subjects And Methods:
Fifty patients with active AM were examined and divided into 3 groups: control group 1 did not differ from the study group in body mass index (BMI); control group 2 did not similar in AHI from the AM group. Polysomnography was done in all the patients.
Results:
SRBDs were detected in 40 (80%) patients. Obstructive apnea was found in all cases. Correlation analysis revealed the relationships between AHI and gender (AHI was higher in the men), BMI, disease duration, and insulin-like growth factor 1 (GF-1). There were no correlations between AHI and gender, maximum adenoma size, and growth hormone levels. Compared with control group 1, the AM group had a statistically significantly higher median AHI [16 (1-92) and 4.7 (0-31.3) episodes per hour of sleep (p < 0.001)]. In control group 2, the median BMI was considerably higher than in the control group [29.2 (19.9-44.3) and 35 (24-56) kg/m2 (p < 0.001).
Conclusion:
The detection rate of SRBDs in patients with active AM was 80%, with obstructive disorders being prevalent. There was a positive relationship between SRBD severity and BMI, AM duration, IGF-1 level. Compared to the controls, the patients with AM developed SRBDs similar in severity with lower BMI; severer SRBDs were detected in the patients with active AM with the similar BMI.
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