Sleep Medicine & Research Center, King Abdulaziz University Hospital

Sleep Medicine

Siraj Wali
Sleep Medicine and Respiratory Consultant
4377, 21491
Saudi Arabia
Contact E-mail:
Research Domain
  • Clinical
  • Others
  • Sleep and Medical Disorders
  • Epidemiology of Sleep
  • Behavioural Sleep Disorders
  • Neurological Sleep Disorders

Laboratory description

The Sleep Medicine and Research Center is a specialized center that provides comprehensive evaluation and treatment of the common sleep disorders in our community.
Located at King Abdulaziz University Hospital in Jeddah, Saudi Arabia, the center was initially founded in May 2011 and was expanded following its success in April 2013.
SMRC has a team including a sleep physician, technologists, nurses and researchers, as well as complete access to all medical expertise and facilities at King Abdulaziz University Hospital when needed. This ensures that all our patients get comprehensive and high quality care.
In addition to its diagnostic and therapeutic services, our center takes an active role in educating the public about sleep disorders through seminars and educational activities. Moreover, the center trains physicians and technologists in sleep medicine and has ongoing local research projects. Examples of ongoing research includes OSA in patents with chronic renal failure, rheumatoid, coronary artery disease, and stroke.
We at the SMRC strongly believe in patient education and therefore have devised educational videos and leaflets to be given out to the public. Furthermore, SMRC organised a public awareness campaign in the city of Jeddah.
We hope that this accreditation serves as a bridge between our healthcare world and the people we wish to serve and share our latest news with.

Technical Capabilities and areas of expertise

SMRC has a total capacity of 4 beds all equipped with type 1 PSG devices in addition to 6 portable type 2 devices.

Moreover, SMRC currently takes pride in its sleep physician, 2 RPSGT certified staff, in addition to 5 other sleep technicians, 3 of which conduct unattended type 2 PSG.

Additional Descriptors, Keywords

Obstructive Sleep Apnea

Selected Publications in the 5 past years:

1. Effects of On-Call shifts on Physicians’ Cognitive Performance, Level of Alertness, Mood and Safety: A Review Article. Wali Siraj*. Saudi J of Int Med. 2011; 1(2): 11-16

2. Prevalence of Sleepiness as a Risk Factor for Road Traffic Accidents : Sample of the Hospitalized Saudi Population. Siraj O Wali*, Roah A Merdad. KAUH Journal. 2012; 19(2): 35-45.

3. Effect of On-Call-Related Sleep Deprivation on Physicians’ Mood and Alertness. Siraj Wali*, Karimah Qutah, Lujain Abushanab, Roa’a Basamh, Jolanar Abushanab, Ayman Krayem. Annlas of thoracic Medicine. 2013; 8(1): 22-27

4. Aerobic exercises relieve symptoms of primary chronic insomnia. Enas Elsayed, Shaza M Kadah, Rana M Alerwi, Ayman B Krayem, Siraj O Wali, HealthMED Journal. 2013; 7(7): 2022 – 2027.

5. Vitamin-D deficiency is associated with Restless Legs Syndrome. Siraj Wali; Afnan Shukr, Ayah Boudal, Ahmad Alsaiari, Ayman Krayem. Submitted for publication.

Key Publications of the Laboratory:

1. Sleep insufficiency, poor sleep, and daytime sleepiness and correlated factors in adolescents of Saudi Arabia. Roah A. Merdad, Leena A. Merdad.

2. Sleep habits in adolescents of Saudi Arabia; distinct patterns and extreme sleep schedules. Merdad RA, Merdad LA, Nassif RA, El-Derwi D, Siraj O. Wali*. Sleep Med. 2014; 15(11):1370-8.

3. The frequency of allergic rhinitis among obstructive sleep apnea patients: a hospital-based, cross-sectional study. Gadi GU, Albar MH, Fida AR, Sendi KS, Alnoury KI, Siraj O. Wali*. JKAU Med Sci 2014; 21(3): 61-74.

4. Obstructive Sleep Apnea among Saudi patients with Coronary Artery Disease in Saudi Arabia. Siraj O. Wali*; Muath A. Alsharif; Mohammed H. Albanji; Murad S. Baabbad; Haneen M. Almotary; Nabil Alama; Layth Mimish; Adil Alsulami; Muntasir M. Abdelaziz. Journal of the Saudi Heart Association. 2015;27:227-233

5. Prevalence and predictors of habitual snoring in a sample of Saudi
middle-aged adults. Siraj O. Wali* and Abalkhail B. Saudi Med J. 2015; 36 (8): 920-927.

6. Obstructive sleep apnea among Saudis with Chronic renal failure on hemodialysis. Siraj O. Wali*, AlKhouli A, Howladar M, Ahmad I, Alshuhaib S, Alghamdi S and Krayem A. Annals of Thoracic Medicine. 2015;10(4):263-8

7. Prevalence of obesity in the middle aged Saudi population. Siraj O.Wali*, Fatin Al-sayes. Journal of Science. 2015; 5(7): 550-554.

8. Sleep quantity, quality, and insomnia symptoms of medical students during clinical years. Mohammed A. Alsaggaf, Siraj O. Wali*, Roah A. Merdad, Leena A. Merdad. Saudi Medical Journal. 2016; 37(2): 173 –182.

9. Prevalence of atopic markers and allergic rhinitis among obstructive sleep apnea patients. Ghada Qadi, Siraj O. Wali*, Emad Koshak, Mohammed Albar, Abdulkarim Fida, Muntasir Abdulaziz. J Epidemiol Glob Health. 2017 Mar.;7(1):37-44

10. Metabolic Phenotype of Obesity in a Saudi Population. Ahmad MS, Alsaleh M, Kimhofer T, Ahmad S, Jamal W, Siraj O. Wali, Nicholson JK, Damanhouri ZA, Holmes E. J Proteome Res. 2017 Feb. 3;16(2):635-644

11. Prevalence and risk factors of obstructive sleep apnea syndrome in a Saudi Arabian population. Siraj O. Wali*, Abalkhail B, Krayem A. Ann Thorac Med 2017;12:88-94

12. The prevalence of obstructive sleep apnea in adult patients with sickle cell disease. Al-Saqqaf R, Merdad R, Siraj O. Wali*, Al-Sayes F, Mukharesh L, Batawi S, Batwai G, Ageel M, Hamid M, Alama N, AlQassas I. J Appl Hematol 2017;8:16-22

13. Sleepiness in Adolescents. Merdad R, Akil H, Siraj O. Wali*. Sleep Medicine Clinics 2017; 12(3): 415-428.

14. The Saudi Thoracic Society guidelines for diagnosis and management of noncystic fibrosis bronchiectasis. Al-Jahdali, H., Alshimemeri, A., Mobeireek, A., Albanna, A. S., Al Shirawi, N. N., Siraj O. Wali, Aliberti, S. Annals of Thoracic Medicine; 2017; 12(3), 135–161

15. Restless Legs Syndrome and Sleep Quality among Adult Sickle Cell Disease Patients. Siraj O. Wali*, Ibrahim AlQassas, Roah Merdad, Rajaa Alsaggaf, Fatin Al-sayes. Sleep and Breath. In Press.

16. Prevalence of Depression, Anxiety, and Stress among Obstructive Sleep Apnea Patients in Saudi Arabia. Sundus Baaisharah, Mohamed Nabil Alamaa, Khalid Aljammali, Badur Bafakeer, Siraj O. Wali*, Haitham Altaib, and Ahmad Bamaquos. Saudi Medical Journal. In Press.

17. Prevalence of Glaucoma in Patients with Obstructive Sleep Apnea.Nahlah Bagabas, Wafaa Ghazali, Mariam Mukhtar, Ibrahim AlQassas,Roah Merdad, Ashfaque Maniyar, Siraj O. Wali*, Halima Afreen,Osama Badeeb. Sleep Med Disord. 2017; 4(2): 1084.

18. Association between Vitamin D Level and Restless Legs Syndrome: ACase Control Study. Siraj O. Wali*, Samah Alsafadi, Bahaa Abalkhail,Iman Ramadan, Badr Abulhamail, Moaiyyad Kousa, Reem Alshamrani,Hanan Faruqui, Abdulaziz Faruqui, Mohamed Alama, Mohamed Hamed.Accepted for Publication. Journal of Clinical Sleep Medicine.

19. Risk Factors of Primary and Secondary Restless Legs Syndrome amonga Middle-Aged Population in Saudi Arabia: A Community-Based Study.Samah Alsafadi, Bahaa Abaalkhail, Siraj O. Wali*, Khaled Aljammali,Bedor Alotaiby, Ibrahim Zakaria, Hanadi Sabbahi. Accepted forPublication. Annals of Thoracic Medicine.

20. Sleep Disorders in Rheumatoid Arthritis. Mohammad Mustafa, YasserBawazeer, Leena Merdad, Siraj O. Wali*, Suzan Attar, Nazmia Salem,
Omar Fathaldeen, Sami Bahlas, Faris Alhejaili, Ahmed Jan. and FatimaJadu, Ahmed Johany. Under review. Annals of Thoracic Medicine.

Current/Completed Grants (past 5 years):

King Abdullah University of Science and Technology (KAUCST) gave SMRC a grant for an ongoing research project regarding the prevalence of sleep apnea in Saudi Arabia. We just entered the 2nd year of this study (stage 2).

We are to apply for further grants for the following researches:

1) The Effect of Continuous Positive Airway Pressure on Stroke Recurrence and Outcomes in the First Year Post-Stroke in Saudi Patients with Obstructive Sleep Apnea.

2) Sleep Disorders in Patients with Rheumatoid Arthritis

3) The prevalence of Sleep Disorders: Community-based Cross Sectional Study

4) Vitamin D in the Treatment of Primary Restless Legs syndrome: 12 weeks, triple-blinded, randomized, placebo-controlled trial

Other laboratory Members

Title:  MD

Name:  Haythum Tayeb

Position:  Assistant Professor in Neuropsychiatry


Title:  MD

Name:  Omar Ayoub

Position:  Assistant Professor in Neurology


Title:  MD

Name:  Abdulkareem Fida

Position:  Assistant Professor in ENT


Title:  MD

Name:  Maisa Alsebaie

Position:  Assistant Professor in Maxillofacial Surgery



Title:  MD

Name:  Ayman Krayem

Position:  Director of Sleep Center at His Institution

Institution:  King Abdulaziz Medical City, National Guard, Western Region, Saudi Arabia

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