Sleep Disturbance in Psoriatic Disease: Prevalence and Associated Factors

From the University of British Columbia, Vancouver, British Columbia; the Department of Medicine, Division of Rheumatology, and Department of Laboratory Medicine and Pathobiology, and the Institute of Medical Science, University of Toronto; Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Krembil Research Institute, and Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada. The Psoriatic Arthritis Program is supported by a grant from the Krembil Foundation. Ian Wong was supported by a Canadian Rheumatology Association–Roche Summer Student Scholarship. I.T. Wong, BSc (Pharmacy), Medical Student, University of British Columbia; V. Chandran, MBBS, MD, DM, PhD, Assistant Professor, Department of Medicine, Division of Rheumatology, and Department of Laboratory Medicine and Pathobiology, and Institute of Medical Science, University of Toronto, and Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Krembil Research Institute, University Health Network; S. Li, MMath, Biostatistician, Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, and Toronto Western Hospital, University Health Network; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, Senior Scientist, Krembil Research Institute, and Director of the Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, and Toronto Western Hospital, University Health Network. Address correspondence to Dr. D.D. Gladman, Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, Room 1E411, 399 Bathurst St., Toronto, Ontario M5T 2S8, Canada. E-mail: dafna.gladman{at}utoronto.ca. Accepted for publication May 10, 2017.

From the University of British Columbia, Vancouver, British Columbia; the Department of Medicine, Division of Rheumatology, and Department of Laboratory Medicine and Pathobiology, and the Institute of Medical Science, University of Toronto; Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Krembil Research Institute, and Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada. The Psoriatic Arthritis Program is supported by a grant from the Krembil Foundation. Ian Wong was supported by a Canadian Rheumatology Association–Roche Summer Student Scholarship. I.T. Wong, BSc (Pharmacy), Medical Student, University of British Columbia; V. Chandran, MBBS, MD, DM, PhD, Assistant Professor, Department of Medicine, Division of Rheumatology, and Department of Laboratory Medicine and Pathobiology, and Institute of Medical Science, University of Toronto, and Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Krembil Research Institute, University Health Network; S. Li, MMath, Biostatistician, Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, and Toronto Western Hospital, University Health Network; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, Senior Scientist, Krembil Research Institute, and Director of the Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, and Toronto Western Hospital, University Health Network. Address correspondence to Dr. D.D. Gladman, Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, Room 1E411, 399 Bathurst St., Toronto, Ontario M5T 2S8, Canada. E-mail: dafna.gladman{at}utoronto.ca. Accepted for publication May 10, 2017.

From the University of British Columbia, Vancouver, British Columbia; the Department of Medicine, Division of Rheumatology, and Department of Laboratory Medicine and Pathobiology, and the Institute of Medical Science, University of Toronto; Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Krembil Research Institute, and Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada. The Psoriatic Arthritis Program is supported by a grant from the Krembil Foundation. Ian Wong was supported by a Canadian Rheumatology Association–Roche Summer Student Scholarship. I.T. Wong, BSc (Pharmacy), Medical Student, University of British Columbia; V. Chandran, MBBS, MD, DM, PhD, Assistant Professor, Department of Medicine, Division of Rheumatology, and Department of Laboratory Medicine and Pathobiology, and Institute of Medical Science, University of Toronto, and Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Krembil Research Institute, University Health Network; S. Li, MMath, Biostatistician, Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, and Toronto Western Hospital, University Health Network; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, Senior Scientist, Krembil Research Institute, and Director of the Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, and Toronto Western Hospital, University Health Network. Address correspondence to Dr. D.D. Gladman, Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, Room 1E411, 399 Bathurst St., Toronto, Ontario M5T 2S8, Canada. E-mail: dafna.gladman{at}utoronto.ca. Accepted for publication May 10, 2017.

From the University of British Columbia, Vancouver, British Columbia; the Department of Medicine, Division of Rheumatology, and Department of Laboratory Medicine and Pathobiology, and the Institute of Medical Science, University of Toronto; Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Krembil Research Institute, and Toronto Western Hospital, University Health Network, Toronto, Ontario, Canada. The Psoriatic Arthritis Program is supported by a grant from the Krembil Foundation. Ian Wong was supported by a Canadian Rheumatology Association–Roche Summer Student Scholarship. I.T. Wong, BSc (Pharmacy), Medical Student, University of British Columbia; V. Chandran, MBBS, MD, DM, PhD, Assistant Professor, Department of Medicine, Division of Rheumatology, and Department of Laboratory Medicine and Pathobiology, and Institute of Medical Science, University of Toronto, and Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, Krembil Research Institute, University Health Network; S. Li, MMath, Biostatistician, Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, and Toronto Western Hospital, University Health Network; D.D. Gladman, MD, FRCPC, Professor of Medicine, University of Toronto, Senior Scientist, Krembil Research Institute, and Director of the Psoriatic Arthritis Program, Centre for Prognosis Studies in the Rheumatic Diseases, and Toronto Western Hospital, University Health Network. Address correspondence to Dr. D.D. Gladman, Centre for Prognosis Studies in the Rheumatic Diseases, Toronto Western Hospital, Room 1E411, 399 Bathurst St., Toronto, Ontario M5T 2S8, Canada. E-mail: dafna.gladman{at}utoronto.ca. Accepted for publication May 10, 2017.