Pablo Martinez-Martin1,2, John B Wetmore1, Carmen Rodríguez-Blázquez1,2, Tomoko Arakaki3, Oscar Bernal4, Victor Campos-Arillo5, Christopher Cerda6, Ingrid Estrada-Bellmann6, Nélida Garretto3, Letty Ginsburg7, Jorge Uriel Máñez-Miró8, Juan Carlos Martínez-Castrillo9, Ivonne Pedroso10, Marcos Serrano-Dueñas11, Carlos Singer7, Mayela Rodríguez-Violante12, Francisco Vivancos8. 1. National Center of Epidemiology Carlos III Institute of Health Madrid Spain. 2. Network Center for Biomedical Research in Neurodegenerative Diseases (CIBERNED) Carlos III Institute of Health Madrid Spain. 3. Parkinson Disease and Other Movement Disorders Unit Hospital José María Ramos Mejía, Neurology University Center of Buenos Aires University Buenos Aires Argentina. 4. Movement Disorders Clinic Hospital Militar Central Bogotá Colombia. 5. Área de Neurociencias Hospitales Vithas-Málaga Málaga Spain. 6. Movement Disorder Clinic University Hospital Monterrey Nuevo León México. 7. Movement Disorders Division Miller School of Medicine, University of Miami Miami Florida USA. 8. Movement Disorders Unit, Neurology department La Paz University Hospital Madrid Spain. 9. Movement Disorders and Neurodegenerative Disorders Unit IRYCIS, Hospital Ramon y Cajal Madrid Spain. 10. Movement Disorders Clinic International Center for Neurological Restoration (CIREN) Havana Cuba. 11. Medicine Faculty, Pontifical Catholic University of Ecuador Movement Disorders Unit, Neurological Service, Carlos Andrade Marín Hospital Quito Ecuador. 12. Movement Disorders Clinic National Institute of Neurology and Neurosurgery Mexico City Mexico.
Abstract
BACKGROUND: Because of the prevalence and impact of sleep disorders in Parkinson's disease (PD), valid instruments for their evaluation and monitoring are necessary. However, some nocturnal sleep disorders may go unnoticed by patients themselves. OBJECTIVES: To validate a pan-Spanish version of the Parkinson's Disease Sleep Scale Version 2 (PDSS-2) and to test the relationships between the PDSS-2 and a PDSS-2 roommate version. METHODS: PD patients (n = 399) from seven Spanish-speaking countries were included. In addition to the tested PDSS-2 scales, valid measures for sleep disorders and both motor and nonmotor manifestations were applied. Acceptability, dimensionality, reliability, precision, and construct validity were explored, as well as discrepancies and agreement between the PDSS-2 and the roommate version. RESULTS: PDSS-2 showed negligible floor and ceiling effects. Four factors (57% of the variance) were identified. Reliability parameters were satisfactory: alpha = 0.84; item homogeneity coefficient = 0.27; corrected item total correlation = 0.28 to 0.61; and test-retest reliability (average kappa = 0.70; intraclass correlation coefficient [ICC] = 0.83). The standard error of measurement was 5.84, and correlations with other scales assessing nocturnal sleep were high (rS = 0.62-0.56). In comparison to the patient-based total score, the by proxy total score showed no significant difference, high correlation (rS = 0.70), and acceptable agreement (ICC = 0.69), but there were discrepancies in two or more points in 18% of item scores. CONCLUSIONS: The Spanish version of the PDSS-2 has shown satisfactory clinimetric attributes. Acceptability and precision data are presented for the first time. The PDSS-2 roommate version could be useful to complement the patient-based evaluation, but additional studies are needed.
BACKGROUND: Because of the prevalence and impact of sleep disorders in Parkinson's disease (PD), valid instruments for their evaluation and monitoring are necessary. However, some nocturnal sleep disorders may go unnoticed by patients themselves. OBJECTIVES: To validate a pan-Spanish version of the Parkinson's Disease Sleep Scale Version 2 (PDSS-2) and to test the relationships between the PDSS-2 and a PDSS-2 roommate version. METHODS: PD patients (n = 399) from seven Spanish-speaking countries were included. In addition to the tested PDSS-2 scales, valid measures for sleep disorders and both motor and nonmotor manifestations were applied. Acceptability, dimensionality, reliability, precision, and construct validity were explored, as well as discrepancies and agreement between the PDSS-2 and the roommate version. RESULTS: PDSS-2 showed negligible floor and ceiling effects. Four factors (57% of the variance) were identified. Reliability parameters were satisfactory: alpha = 0.84; item homogeneity coefficient = 0.27; corrected item total correlation = 0.28 to 0.61; and test-retest reliability (average kappa = 0.70; intraclass correlation coefficient [ICC] = 0.83). The standard error of measurement was 5.84, and correlations with other scales assessing nocturnal sleep were high (rS = 0.62-0.56). In comparison to the patient-based total score, the by proxy total score showed no significant difference, high correlation (rS = 0.70), and acceptable agreement (ICC = 0.69), but there were discrepancies in two or more points in 18% of item scores. CONCLUSIONS: The Spanish version of the PDSS-2 has shown satisfactory clinimetric attributes. Acceptability and precision data are presented for the first time. The PDSS-2 roommate version could be useful to complement the patient-based evaluation, but additional studies are needed.
Authors: Neil Aaronson; Jordi Alonso; Audrey Burnam; Kathleen N Lohr; Donald L Patrick; Edward Perrin; Ruth E Stein Journal: Qual Life Res Date: 2002-05 Impact factor: 4.147
Authors: J D Fisk; M G Brown; I S Sketris; L M Metz; T J Murray; K J Stadnyk Journal: J Neurol Neurosurg Psychiatry Date: 2005-01 Impact factor: 10.154
Authors: J Marinus; M Visser; A M Stiggelbout; J Martin Rabey; P Martínez-Martín; U Bonuccelli; P H Kraus; J J van Hilten Journal: J Neurol Neurosurg Psychiatry Date: 2004-03 Impact factor: 10.154
Authors: Johan Marinus; Martine Visser; Jacobus Johannes van Hilten; Gert Jan Lammers; Anne Margarethe Stiggelbout Journal: Sleep Date: 2003-12-15 Impact factor: 5.849