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Observational Study
. 2021 Jul 26:12:622496.
doi: 10.3389/fendo.2021.622496. eCollection 2021.

Obstructive Sleep Apnea Is Associated With Low Testosterone Levels in Severely Obese Men

Milina Tančić-Gajić  1 , Miodrag Vukčević  2 , Miomira Ivović  1 , Ljiljana V Marina  1 , Zorana Arizanović  1 , Ivan Soldatović  3 , Miloš Stojanović  1 , Aleksandar Đogo  4 , Aleksandra Kendereški  1 , Svetlana Vujović  1
Affiliations
Observational Study

Obstructive Sleep Apnea Is Associated With Low Testosterone Levels in Severely Obese Men

Milina Tančić-Gajić et al. Front Endocrinol (Lausanne). .

Abstract

Background: Disrupted sleep affects cardio-metabolic and reproductive health. Obstructive sleep apnea syndrome represents a major complication of obesity and has been associated with gonadal axis activity changes and lower serum testosterone concentration in men. However, there is no consistent opinion on the effect of obstructive sleep apnea on testosterone levels in men.

Objective: The aim of this study was to determine the influence of obstructive sleep apnea on total and free testosterone levels in severely obese men.

Materials and methods: The study included 104 severely obese (Body Mass Index (BMI) ≥ 35 kg/m2) men, aged 20 to 60, who underwent anthropometric, blood pressure, fasting plasma glucose, lipid profile, and sex hormone measurements. All participants were subjected to polysomnography. According to apnea-hypopnea index (AHI) patients were divided into 3 groups: <15 (n = 20), 15 - 29.9 (n = 17) and ≥ 30 (n = 67).

Results: There was a significant difference between AHI groups in age (29.1 ± 7.2, 43.2 ± 13.2, 45.2 ± 10.2 years; p < 0.001), BMI (42.8 ± 5.9, 43.2 ± 5.9, 47.1 ± 7.8 kg/m2; p = 0.023), the prevalence of metabolic syndrome (MetS) (55%, 82.4%, 83.6%, p = 0.017), continuous metabolic syndrome score (siMS) (4.01 ± 1.21, 3.42 ± 0.80, 3.94 ± 1.81, 4.20 ± 1.07; p = 0.038), total testosterone (TT) (16.6 ± 6.1, 15.2 ± 5.3, 11.3 ± 4.44 nmol/l; p < 0.001) and free testosterone (FT) levels (440.4 ± 160.8, 389.6 ± 162.5, 294.5 ± 107.0 pmol/l; p < 0.001). TT level was in a significant negative correlation with AHI, oxygen desaturation index (ODI), BMI, MetS and siMS. Also, FT was in a significant negative correlation with AHI, ODI, BMI, age, MetS and siMS. The multiple regression analysis revealed that both AHI and ODI were in significant correlation with TT and FT after adjustment for age, BMI, siMS score and MetS components.

Conclusion: Obstructive sleep apnea is associated with low TT and FT levels in severely obese men.

Keywords: male; metabolic syndrome; obesity; sleep apnea; testosterone.

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Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Figures

Figure 1
Figure 1
STROBE flowchart of the present study.
Figure 2
Figure 2
Correlations between total testosterone and free testosterone with apnea-hypopnea index and oxygen desaturation index.
Figure 3
Figure 3
Receiver operating characteristic (ROC) curves – total testosterone (T) and tree testosterone (FT) as discriminative variables for the assessment of sleep apnea severity. (A) AUC for AHI ≥ 15 for TT was AUCT = 0.714 (95% CI 0.587 - 0.841; p = 0.003) with cut off = 14.5 (Sn = 0.726; Sp = 0.650), and for FT AUCFT = 0.719 (95% CI 0.588 - 0.851; p = 0.002) with cut off = 412 (Sn = 0.821; Sp = 0.600). (B) AUC for AHI ≥ 30 for TT was AUCT = 0.748 (95% CI 0.648 - 0.849; p < 0.001) with cut off = 14.3 (Sn = 0.806; Sp = 0.649) and for FT AUCFT = 0.728 (95% CI 0.620 - 0.836; p < 0.001) with cut off = 396 (Sn = 0.866; Sp = 0.568).
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Comment in

  • Benign Prostatic Hyperplasia.
    Kaplan SA. Kaplan SA. J Urol. 2022 Jan;207(1):201-204. doi: 10.1097/JU.0000000000002275. Epub 2021 Oct 18. J Urol. 2022. PMID: 34661444 No abstract available.

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