Journal of Sleep Sciences http://jss.tums.ac.ir/index.php/jss <p>The “Journal of Sleep sciences (JSS) “<strong>(<span style="text-decoration: underline;">رتبه علمی- پژوهشی) </span></strong>is the official scientific quarterly publication affiliated with Occupational Sleep Research Center (OSRC) of Tehran University of Medical Sciences. JSS is also official journal of Iranian Sleep Medicine Society. The main goals of journal are to improve the knowledge and awareness of clinicians and research professionals about the latest findings in prevention, diagnosis, treatment and etiology of sleep disorders. We would be very delighted to receive your Original Papers, Review Articles, Short communications, Case reports and Scientific Letters to the Editor on the all areas of sleep sciences.&nbsp;</p> Tehran University of Medical Sciences en-US Journal of Sleep Sciences 2476-2938 Idiopathic Central Sleep Apnea: A Case Report http://jss.tums.ac.ir/index.php/jss/article/view/118 <p><strong>Background and Objective:</strong> Central sleep apnea (CSA) is defined as cessation of breathing in the absence of ventilatory drive for at least 10 seconds. Idiopathic central sleep apnea (ICSA) is a rare disorder with unclear etiology, and diagnosis is made upon exclusion of other causes. Many of the patients with ICSA do not receive appropriate treatment.</p> <p><strong> Case Report:</strong> Here, we report a 38-year-old man with history of daily hypersomnolence and decreased concentration since two years before referring to our center. After comprehensive medical approach for CSA, he was diagnosed as ICSA. The patient did not respond and did not tolerate continuous positive airway pressure (CPAP). Zolpidem was prescribed for the patient, and he had dramatic improvement of symptoms.</p> <p><strong>Conclusion:</strong> ICSA is a rare sleep breathing disorder presenting with CSA, and may be misdiagnosed with other causes of CSA in the cases of non-appropriate medical evaluation. However, there is no definite treatment.</p> <p>&nbsp;</p> Besharat Rahimi Hossein Kazemizadeh Maryam Edalati Fard ##submission.copyrightStatement## 2019-01-07 2019-01-07 3 1-2 41 44 Sleep Quality in Shift Workers of Offshore Petroleum Industries http://jss.tums.ac.ir/index.php/jss/article/view/102 <p><strong>Background and Objective:</strong> Shift work, especially at nights, has negative health outcomes for the workers, their families, and affiliated organizations. Working at night is associated with shortened and disturbed sleep, daytime sleepiness, fatigue, impaired performance, and increased risk of accidents. In this study, we aimed to evaluate sleep quality in different shift schedules of Iranian workers of offshore drilling rigs.</p> <p><strong>Materials and Methods:</strong> One hundred and ninety two offshore workers of two oil rigs were enrolled in this crosssectional study. They were asked to fill out the validated and reliable Persian version of Pittsburg Sleep Quality Index (PSQI). Data regarding age, marital status, education level, smoking, shift work schedule, and body mass index (BMI) were recorded as well.</p> <p><strong> Results:</strong> Mean age and mean work experience of the participants were 37.0 ± 9.3 and 10.0 ± 8.6 years, respectively. Fifty six participants (29.2%) were fixed day shift workers, 111 (57.8%) were swing shift workers (7 days/7 nights), 6 (3.1%) were fixed night shift workers, and 19 (9.9%) were standby shift workers. Mean PSQI score of all workers was 6.73 ± 3.61, and in 69% of the subjects, total score of PSQI was ≥ 5. Night shift workers had greater score of PSQI than other three groups of shift workers.</p> <p><strong> Conclusion:</strong> This study showed that more than half of oil rig workers had poor sleep quality with the highest score among fixed night shift workers. This warrants comprehensive evaluation of the studied participants in terms of sleep disorders and related risk factors. Investigation of contributing occupational and environmental risk factors is also recommended.</p> Khosro Sadeghniiat-Haghighi Omid Aminian Areza Najafi Ania Rahimi-Golkhandan Alireza Zahabi ##submission.copyrightStatement## 2019-01-07 2019-01-07 3 1-2 36 40 Comparative Investigation of Sleep Problems in Opioid-Dependent and Normal Subjects http://jss.tums.ac.ir/index.php/jss/article/view/91 <p><strong>Background and Objective:</strong> Sleep disorders are one of the problems of substance abusers, which might result in emotional and logical thinking breakdown in those individuals. The main aim of the current research was to compare sleep problems in two groups of substance users and normal subjects.</p> <p><strong>Materials and Methods:</strong> This study compared 90 substance users who were referred to the addiction treatment centers with 90 subjects who were relatives as a normal group. Participants were asked to fill out Pittsburgh Sleep Quality Index (PSQI), Epworth Sleepiness Scale (ESS), Insomnia Severity Index (ISI), and STOP-BANG questionnaires. Data analysis was performed using independent t-test and descriptive indicators at the significant level of P &lt; 0.050.</p> <p><strong> Results:</strong> The average of age was 38.21 ± 4.35 years in the addict group and 41.11 ± 5.27 in the normal group (P &lt; 0.050). All the participants were men. Our findings indicated a significant difference between the two study groups in the PSQI (P &lt; 0.001) and ESS (P &lt; 0.010) scores with a higher mean score for the addict group. However, normal group showed a significantly higher mean score on the ISI and STOP-BANG compared to the addict group (P &lt; 0.010).</p> <p><strong>Conclusion:</strong> According to the results of this study, sleep problems are common in people who are dependent on drugs, and should be given more attention.</p> Mehdi Madanifard Mehrdad Mazaheri Imanolah Bigdeli ##submission.copyrightStatement## 2019-01-07 2019-01-07 3 1-2 25 29 Motor Vehicle Accidents in Patients with Excessive Daytime Sleepiness http://jss.tums.ac.ir/index.php/jss/article/view/94 <p><strong>Background and Objective:</strong> Excessive daytime sleepiness (EDS) is a common problem in patients referred to sleep clinics, which could result in adverse consequences in their personal and social activities including motor vehicle accidents (MVAs). Epworth Sleepiness Scale (ESS) and Multiple Sleep Latency Test (MSLT) are known methods for measuring EDS. In this study, we aimed to evaluate the relationship between EDS and MVAs. <strong>Materials and Methods:</strong> Medical records of 144 patients (106 men) with EDS referred to Baharloo Sleep Clinic, Tehran, Iran, were assessed in this cross-sectional study. All participants filled out a questionnaire including demographic characteristics, ESS, and history of MVAs due to sleepiness in the last five years and underwent full-night polysomnography (PSG) and MSLT. Sleepiness was categorized to normal, moderate, or severe according to mean sleep latency (MSL) in MSLT.</p> <p><strong> Results:</strong> Patients with history of MVAs had a significantly less MSL and higher ESS scores than those without MVAs (6.6 ± 3.9 vs. 9.3 ± 6.5, P = 0.038; and 17.9 ± 4.4 vs. 15.6 ± 5.5, P = 0.030, respectively). MVAs were reported in 41.9%, 31.0%, and 16.1% of patients with severe, moderate, and normal sleepiness, respectively. There was a significant relationship between severity of sleepiness and history of MVAs (P = 0.020). Regression analysis showed that after adjustment for age and sex, ESS and MSL remained significantly different between patients with and without MVAs.</p> <p><strong>Conclusion:</strong> ESS score and MSL would help sleep clinicians to find high-risk patients for safety-sensitive jobs, the issue which should not be overlooked by them during visits in sleep clinic.</p> Arezu Najafi Khosro Sadeghniiat-Haghighi Ahmad Khajeh-Mehrizi Ania Rahimi-Golkhandan ##submission.copyrightStatement## 2019-01-07 2019-01-07 3 1-2 21 24 Sleep Quality in Patients with Multiple Sclerosis http://jss.tums.ac.ir/index.php/jss/article/view/100 <p><strong>Background and Objective:</strong> Multiple sclerosis (MS) is an autoimmune neurologic disorder with higher prevalence in female adults. Patients with MS suffer from many consequences of the disease, which result in poor quality of life. In this study, we aimed to evaluate the sleep quality in patients with MS as an important aspect of their life and the relationship between sleep quality and different types of the disease, treatment, and individual characteristics.</p> <p><strong> Materials and Methods:</strong> A total of 152 patients diagnosed with MS at the department of neurology, West Azerbaijan Province, Iran, were enrolled in this cross-sectional study. Participants were asked to fill out a questionnaire consisting of demographic and disease characteristics, types of treatment, and the validated Persian version of Pittsburgh Sleep Quality Index (PSQI). PSQI score ≥ 5 and &lt; 5 were categorized as poor and good sleep quality, respectively.</p> <p><strong>Results:</strong> In this study, the average of PSQI score in all patients was 9.28 ± 5.11. 105 patients (69.1%) had PSQI ≥ 5 (poor sleep quality); whereas 47 patients (31.9%) had PSQI &lt; 5 (good sleep quality). The type of drug (Rebif) used by the patients had a significant effect on categories of self-reported sleep quality among patients (P = 0.01).</p> <p><strong>Conclusion:</strong> This study showed a high prevalence of poor sleep quality in patients with MS. More evaluations are needed for better management of sleep problems in these patients.</p> Arash Mosarrezaii Nazafarin Ghasemzadeh Ania Rahimi-Golkhandan Arezu Najafi Samineh Hashemi Parisa FazelKia ##submission.copyrightStatement## 2019-01-07 2019-01-07 3 1-2 17 20