Global practice of sleep medicine: Iran.

STUDY OBJECTIVES: In this study we aimed to conduct a comprehensive review of sleep medicine in Iran, focusing on the country's advancements, challenges, and the global context. METHODS: We conducted a comprehensive review of sleep medicine in Iran, using various sources to ensure a thorough analysis. The national educational curriculum for sleep medicine and guidelines on sleep clinics issued by Iran's Ministry of Health served as a foundational resource. Additionally, we gathered information from the Iranian Sleep Medicine Society website and relevant committee data sources. To enhance our understanding of the current research landscape, we performed a targeted search on PubMed using keywords related to sleep and Iran. RESULTS: The study presents a dynamic overview of sleep medicine in Iran, highlighting key advancements and challenges. Significant progress was observed in establishing standardized sleep medicine training and accredited sleep clinics. The Iranian Sleep Medicine Society plays a pivotal role in spearheading these developments, contributing to implementing regional guidelines for sleep tests. However, challenges such as a limited number of trained specialists, a scarcity of certified sleep clinics, and obstacles to accessing sleep disorder treatments were identified. CONCLUSIONS: We advocate for the implementation of increased research initiatives, nationwide education and screening programs, and proactive measures to strengthen the landscape of sleep and circadian medicine in the country. CITATION: Behkar A, Amirifard H, Samadi S, et al. Global practice of sleep medicine: Iran. J Clin Sleep Med. 2024;20(6):1009-1015.

A nationwide study on the prevalence and contributing factors of obstructive sleep apnea in Iran.

Reliable obstructive sleep apnea (OSA) prevalence information in Iran is lacking due to inconsistent local study results. To estimate OSA prevalence and identify clinical phenotypes, we conducted a nationally representative study using multi-stage random cluster sampling. We recruited 3198 individuals and extrapolated the results to the entire Iranian population using complex sample survey analyses. We identified 3 clinical phenotypes as "sleepy," "insomnia," and "restless legs syndrome (RLS)." The prevalence of OSA was 28.7% (95%CI: 26.8-30.6). The prevalence of "sleepy," "insomnia," and "RLS" phenotypes were 82.3%, 77.8%, and 36.5% in women, and 64.8%, 67.5%, and 17.9% in men, respectively. "Sleepy" and "insomnia" phenotypes overlapped the most. Age (OR: 1.9), male sex (OR: 3.8), BMI (OR: 1.13), neck circumference (OR: 1.3), RLS (OR: 2.0), and insomnia (OR: 2.3) were significant OSA predictors (p-values: 0.001). In men, "sleepy" phenotype was associated with youth and unmarried status but not in women. The "insomnia" phenotype was associated with shorter sleep duration in women; cardiovascular diseases (CVD), urban residency, and shorter sleep duration in men. "RLS" phenotype was associated with shorter sleep duration and CVD in women and older age, lower educational level, CVD, and hypertension in men. The findings point to the need for funding of OSA screening in Iran, for a different assessment of men and women, and for future sleep research to consider overlapping phenotypes.

The effects of CPAP therapy on metabolic profile and subjective sleep parameters in patients with OSA: a prospective trial study.

Objective: Several studies confirmed a positive association between obstructive sleep apnea (OSA) and metabolic syndrome. Continuous positive airway pressure (CPAP) is the main treatment for patients with moderate and severe OSA. CPAP therapy in adults with OSA results in reduction in sleepiness, blood pressure and improvement of metabolic profile. In this study, we aimed to evaluate the effects of CPAP therapy on various components of metabolic syndrome and subjective sleep parameters in patients with OSA. Material and Methods: In this prospective trial study, 28 patients with moderate and severe OSA enrolled. Patients were asked to fill out the validated Persian version of questionnaires including Epworth sleepiness scale, insomnia severity index, STOP-BANG and Beck depression inventory - II, before and after treatment with CPAP. Weight and blood pressure were recorded before and after treatment. Only 14 patients agreed to blood sampling before and after CPAP therapy (at least 3 months of treatment). Fasting blood samples were analyzed for measuring the levels of FBS (fasting blood sugar), TG (triglyceride), total cholesterol, HDL, LDL, AST, and ALT. Results: Diastolic blood pressure, ISI and STOP-BANG score significantly decreased after treatment (p-value: 0.008, 0.022 and 0.004, respectively). FBS and TG levels decreased after treatment, but only TG levels had significant difference (p-value: 0.46 and 0.016, respectively). Discussion: CPAP therapy had positive effects on diastolic blood pressure, TG levels and ISI score. More studies with larger sample size and longer follow-up periods are warranted to investigate the effects of CPAP therapy on blood pressure, and metabolic parameters.

Association of sleep characteristics and respiratory symptoms at a smelting factory.

BACKGROUND: Sleep disturbance including insomnia and poor sleep quality has been shown to be a major health determinant in occupational settings. Specific occupational exposures to hazards in most workplaces can lead to various health problems, especially sleep problems. OBJECTIVE: The study aimed to investigate sleep characteristics, and their relationships with work-related exposures, demographics, and other related variables in workers of a smelting factory. METHODS: This cross-sectional study was carried out on workers in a 40-year smelting factory located in the East of Tehran Province. A total of 200 male participants were included in the study. Among them, 51 workers were from the production process staff and the rest were office workers. Their shifts were from 6 AM to 5 PM. All participants were asked about demographic characteristics and exposure to respiratory pollutants. All participants answered validated Persian versions of the Insomnia Severity Index (ISI) and the Pittsburgh Sleep Quality Index (PSQI). RESULTS: The means (SD) of age and BMI were 39.1 (8.9) years and 26.8 (4.5) kg/m2, respectively. Among all participants, 51 (25.5%) experienced exposure to a respiratory pollutant. Among all workers, 96 (48%) experienced poor sleep quality and 87 (43.5%) and 10 (5%) had subthreshold and clinical insomnia, respectively. The mean (SD) night sleep duration was 6.4 (0.96) hours. Data analysis illustrated a significant positive relationship between exposure to respiratory pollutants and insomnia (p-value = 0.03). Howewer, this association between sleep quality and exposure to repiratory pollutants was not significant (p-value = 0.25). Further analysis with binominal regression showed participants with exposure to respiratory pollutants were more susceptible to clinical insomnia (p-value = 0.02, exp(B) = 0.213), and after regressing out the effect of smoking, participants with exposure to respiratory pollutants remained susceptible to clinical insomnia. A lower night sleep duration was observed among participants with exposure to inhalational material (p-value = 0.05). CONCLUSIONS: Occupational exposures to hazardous material, including inhalational exposures, could cause sleep disturbance, which warrants more attention paid by sleep specialists.

COVID-19 Fear Association with Depression, Anxiety, and Insomnia: A National Web-Based Survey on the General Population.

Objective: COVID-19 pandemic has influenced almost every country worldwide. Being in a pandemic situation can cause psychological distress to people, which can lead to sleep disorders. The present study aimed to assess prevalence of depression, anxiety, and insomnia among Iranian people and their relations with COVID-19 fear in the early stages of COVID-19 pandemic. Method: A cross-sectional and population-based online study was designed. We created an online form and used Fear of COVID-19 scale (FCV-19), Generalized Anxiety Disorder 2 scale (GAD-2), Patient Health Questionnaire-2 (PHQ-2), and Insomnia Severity Index (ISI), to assess fear of COVID-19, anxiety, depression, and insomnia, respectively. We sent the link to the online survey to Iranians interested in participating in the study via social media, and 1223 Iranian completed the form. Results: A total of 1223 individuals with a mean age of 39.82 ± 10.75 years participated in the study. Prevalence of insomnia, depression and anxiety among our participants were 55.2%, 61.5%, and 50.9%, respectively. The mean FCV-19 score among the participants was 19.70 ± 5.08. Insomnia was more common among those who were 50 years or older. Fear of COVID-19 was related to a more risk of progression toward depression, anxiety, and insomnia. Conclusion: Fear of COVID-19 has a considerable association with depression, anxiety, and insomnia in the pandemic, and strategies to reasonably decrease people's fears can help to reduce incidence of psychological issues during the pandemic.

Sleep characteristics of Iranian people and their effects on daytime functioning: a population-based study.

Sleep characteristics vary between populations. Detrimental sleep habits have cognitive consequences leading to daytime functioning debilitation. Until now no study has been done to investigate sleep characteristics in Iran thoroughly. In this study, we aimed to evaluate Iranians' sleep characteristics and their association with daytime functioning. We conducted a population-based study from January 2017 to May 2019 on people more than 18 years old who lived in 11 urban destricts and 3 rural areas of Tehran, Iran. We randomly selected the participants using a multistage random stratified clustered sampling method. We obtained the participants' demographic and anthropometric characteristics and details of bedtime, sleep duration, sleep onset latency, wake-up time and sleep impact on daytime functioning. Logistic regression model was used to assess the relationship between sleep characteristics) and daytime functioning. In total, 1830 people with a mean age of 40.83 years participated in the study. The gender distribution of the participants was even, and 70.98% of them were married. After adjusting for age and sex, the following three factors had a significant impact on daytime functioning: bedtime, sleep onset latency, and sleep duration. (OR = 1.12, P < 0.038, OR = 1.01, P < 0.011, and OR = 0.99, P = 0.01, respectively). We also found that longer sleep onset latency (P = 0.004) and shorter sleep durations (P = 0.029) significantly interfere with daytime functioning. Iranians' sleep characteristics, especially their sleep duration and sleep onset latency, are associated with their daytime function. Interventions on people's sleep hygiene are warranted to promote healthier sleep behaviors among Iranians, considering the high impact of current sleep characteristics on their daily lives.

Patients with Obstructive Sleep Apnea Symptoms Referral to Otolaryngologists in Iranian Residency Entrance Examination Volunteers: The Effect of Source of Education and Level of Knowledge.

Obstructive sleep apnea (OSA) has various complications for individuals' health. This study aimed to evaluate the factors for referring obstructive sleep apnea patients to otolaryngologists in Iranian residency entrance examination volunteers. This cross-sectional study recruited volunteer participants from the Iranian Residency Entrance Examination on March 2, 2018. The Obstructive Sleep Apnea Knowledge and Attitudes (OSAKA)/the Obstructive Sleep Apnea Knowledge and Attitudes in Children (OSAKA-KIDS) Questionnaires were distributed among residents attending exam preparation. Number of years working as a physician, number of adult and pediatric patients visited during the academic rank in residency examination, and the main specialty during general physician education in which they get familiar with obstructive sleep apnea were documented. The effect of the mentioned variables evaluated on patient referral preference specialty. Of the 95 volunteers, 57.9% were female; mean age was 29.6 ± 3.3 years. The overall knowledge score of the OSAKA questionnaire was 9.85 ± 3.9 and for the OSAKA-KIDS questionnaire was 9.2 ± 4.9. In patients under 18 years of age, the most frequent referrals were from otolaryngology specialists (51.2%). The only factor which had positive significant effect on adult patient referral preference was source of obstructive sleep apnea knowledge during general physician taring (p < 0.001). Given the low awareness about OSA in candidates for the residency entrance exam and the high importance of this treatable disease, the need for comprehensive training courses during residency is warranted and the adequacy of sleep apnea education through all involved specialty during general physician education should be improved.

In-Depth Characterization of Sleep Patterns Among People with Insomnia During the Pandemic of COVID-19.

BACKGROUND: The effects of the COVID-19 pandemic on sleep duration and insomnia have been well studied in different studies. However, there is no study available on the characteristics of insomnia during the pandemic. This study aimed to evaluate the characteristics of insomnia experienced by the general Iranian population during the COVID-19 pandemic. METHODS: A cross-sectional community-based study was designed. We designed an online questionnaire and sent it to Iranian people via available social platforms. The questionnaire contained questions on the socio-demographic characteristics of the participants. We used Fear of COVID-19 scale (FCV-19), Insomnia Severity Index (ISI), Patient Health Questionnaire-2 (PHQ-2), and Generalized Anxiety Disorder Scale-2 (GAD-2) for detailed characterization of insomnia and its symptoms. RESULTS: In total, 675 people with insomnia with the mean age of 40.28 years (SD=11.15) participated in our study. Prevalence of difficulty initiating sleep (DIS), difficulty maintaining sleep (DMS), and early morning awakening (EMA) were 91.4%, 86.7%, and 77%, respectively. DIS, DMS, and EMA were more common in people with depression and anxiety. FCV-19 score was higher in those with more severe types of DIS, DMS, and EMA (P<0.001). FCV-19 was a risk factor for all patterns of insomnia (OR=1.19, 1.12, 1.02 for DIS, DMS, and EMA, respectively). CONCLUSION: Fear of COVID-19 is a major contributing factor to insomnia patterns. Investigation of COVID-19 fear in people with insomnia and the addition of attributed relieving or management strategies to conventional management of insomnia are reasonable approaches to improve the sleep condition of people in the pandemic.

The effect of apnea management on novel coronavirus infection: A study on patients with obstructive sleep apnea.

OBJECTIVE: To assess the frequency of coronavirus disease-2019 (COVID-19) and the effect of obstructive sleep apnea (OSA) management on COVID-19 among patients with confirmed OSA. DESIGN: Cross-sectional telephone interview survey. SETTING: Academic sleep labs. PARTICIPANTS: Iranian adults ≥ 18 years old with confirmed OSA. RESULTS: Among 275 participants with OSA, 20% (n = 55) were suspected to have history of COVID-19 but had no positive test, and 18% (n = 51) were in the definite COVID-19 group according to their reported symptoms or confirmed positive test. Having severe OSA (apnea hypopnea index ≥ 30) was associated with an increased risk of definite COVID-19, with an odds ratio (OR) with 95% confidence interval (95% CI) of 2.31 (0.87-5.55) compared to having mild OSA in definite COVID-19 group. Those not undergoing treatment for OSA had an OR (95% CI) of 2.43 (1.26-4.67) for definite COVID-19 compared to those accepting treatment in definite COVID-19 group. Total sleep times (TSTs) were 354, 340, and 320 minutes in healthy, suspected, and COVID-19 groups, respectively; TST was associated with COVID-19 (P-value = .04). Similarly, sleep efficiency (SE) scores were 75.7, 74.2, and 67.9% for the healthy, suspected, and COVID-19 groups, respectively (P-value = .005); Beck Depression scores were 13.8, 13.0, and 17.7, respectively (P-value = .056). CONCLUSIONS: OSA as a proinflammatory condition with multiple comorbidities may be a contributing factor to developing COVID-19. Greater OSA severity, no treatment for OSA, and lower TST and SE were associated with increased COVID-19 prevalence among patients with OSA.

COVID-19: sleep research perspectives.

Coronavirus disease of 2019 (COVID-19) pandemic originated from Wuhan in December 2019 and has been spread in whole China and the world. Worldwide outbreaks of COVID-19 triggered a large number of morbidities and mortalities beside its economic and social burdens, which are discussed a lot, in scientific literature and different types of media. As a sleep medicine specialist, we may wonder how we can be involved in this field. In this short theoretical essay, we will discuss about the known facts as well as the hypotheses, which associate the sleep medicine to COVID-19. The discussed points may provide a source of research ideas throughout the world for better understanding of novel coronavirus-19 that has devastating effects on humanity.

Aloysia citriodora Palau (lemon verbena) for insomnia patients: A randomized, double-blind, placebo-controlled clinical trial of efficacy and safety.

Aloysia citriodora (A. citriodora) has a long history of traditional use for sedation and treatment of insomnia in different societies. This study was carried out to assess the efficacy of A. citriodora in patients with insomnia. One hundred patients were randomly divided into two groups of A. citriodora (total essential oil 1.66 mg/10 ml and total amount of flavonoid in terms of quercetin 3.22 mg/10 ml of the syrup) and placebo. They were advised to use 10 cc of the syrups; an hour before the bedtime for a period of 4 weeks. Participants were assessed using Pittsburgh Sleep Quality Index (PSQI) and Insomnia Severity Index (ISI) questionnaires at the baseline and then 2 and 4 weeks after the enrollment. Mean scores of global PSQI and its four components including sleep latency, habitual sleep efficiency, daytime dysfunction, and subjective sleep quality and also ISI score in the A. citriodora group improved significantly after 4 weeks of treatment when compared with the placebo group (p < 0.001, for all of them). Also, improvement of global score of PSQI and ISI was observed in the intervention group as compared with the placebo group, 2 weeks after the enrollment (p < 0.001). The results of this study showed that oral intake of A. citriodora can be suggested as a complementary treatment for patients with insomnia.

The STOP-BANG questionnaire: reliability and validity of the Persian version in sleep clinic population.

PURPOSE: The snoring, tiredness, observed apnea, blood pressure, body mass index, age, neck circumference, gender (STOP-BANG) is a concise and effective obstructive sleep apnea (OSA) screening tool, part questionnaire (STOP), and part demographic or anthropometric measurements (BANG). The main purpose of this study was to translate this well-liked questionnaire into Persian and assess its reliability and validity in sleep clinic population. METHODS: Standard forward-backward method was used for translation. A sample of 603 patients, who admitted to the sleep clinic, completely answered to the STOP questionnaire and underwent in-laboratory polysomnography, included in this study. Height, weight, and neck circumference were measured by technicians for calculating BANG score. The apnea-hypopnea index (AHI) on the polysomnography was used as gold standard for OSA diagnosis: none (AHI < 5), mild (5 ≤ AHI < 15), moderate (15 ≤ AHI < 30), and severe (AHI ≥ 30). One hundred and forty one patients were answered to the STOP questionnaire twice at a time interval of 2-4 weeks for test-retest analysis. RESULTS: In reliability analysis, 124 (87.9 %) patients had same STOP score and 130 (92.2 %) patients were classified in same risk of OSA. Based on the polysomnography, 438 patients (72.6 %) had mild (n = 124, 20.4 %), moderate (n = 114, 18.9 %), and severe (n = 201, 33.3 %) OSA, whereas according to the STOP-BANG, 502 patients (83.3 %) were at high risk of OSA. The sensitivity and specificity of the STOP-BANG were found to be 91.6 and 45.2 %, respectively, at AHI ≥ 5, 97.1 and 35.2 %, respectively, at AHI ≥ 15, and 98 and 29.4 %, respectively, at AHI ≥ 30. The area under the curve of the STOP-BANG for identifying mild, moderate, and severe OSA was 0.805, 0.779, and 0.755, respectively. CONCLUSIONS: Persian version of the STOP-BANG performs similar to its original version and is an easy-to-use questionnaire which could be considered as a reliable and valid tool for OSA screening.

Neck and upper extremity symptoms among male dentists and pharmacists.

BACKGROUND: There are many studies discussed about musculoskeletal disorders in dentists, but most of them do not have a control group. OBJECTIVE: The aim of this study was to assess neck and upper limb symptoms in male dentists in comparison with pharmacists. METHODS: In this cross-sectional study, 252 male general dentists compared with 188 male general pharmacists with Standardized Nordic Questionnaire. Subjects were at least one year in clinical practice after becoming qualified. The data were analyzed using a series of univariate and multivariate analysis. RESULTS: Having at least one neck or upper extremity symptom in the past 12 months (OR = 3.2, P< 0.001) was reported by 76.2% of the male dentists and 50.0% of the male pharmacists In logistic regression analyses, with adjustments for occupation, age, body mass index, smoking, working years and weekly work hours, there was a significant association between dentistry and 12-month period prevalence symptoms of neck (OR = 2.136), shoulder (OR = 2.059) and elbow (OR = 4.167). Second logistic regression model in male dentists indicated that working years was negatively related to self-reported symptoms of neck, shoulder and hand. CONCLUSIONS: Male dentists are at risk of developing musculoskeletal disorders in the neck and upper extremities more than male pharmacists.