The DOI matches its Crossref record; 35 of the 35 references it cites were found in a registry or an index.
Validation of patient determined disease steps (PDDS) scale scores in persons with multiple sclerosis
Open accessAbstract
Background: The Patient Determined Disease Steps (PDDS) is a promising patient-reported outcome (PRO) of disability in multiple sclerosis (MS). To date, there is limited evidence regarding the validity of PDDS scores, despite its sound conceptual development and broad inclusion in MS research. This study examined the validity of the PDDS based on (1) the association with Expanded Disability Status Scale (EDSS) scores and (2) the pattern of associations between PDDS and EDSS scores with Functional System (FS) scores as well as ambulatory and other outcomes. Methods: 96 persons with MS provided demographic/clinical information, completed the PDDS and other PROs including the Multiple Sclerosis Walking Scale-12 (MSWS-12), and underwent a neurological examination for generating FS and EDSS scores. Participants completed assessments of cognition, ambulation including the 6-minute walk (6 MW), and wore an accelerometer during waking hours over seven days. Results: There was a strong correlation between EDSS and PDDS scores (ρ = .783). PDDS and EDSS scores were strongly correlated with Pyramidal (ρ = .578 & ρ = .647, respectively) and Cerebellar (ρ = .501 & ρ = .528, respectively) FS scores as well as 6 MW distance (ρ = .704 & ρ = .805, respectively), MSWS-12 scores (ρ = .801 & ρ = .729, respectively), and accelerometer steps/day (ρ = -.740 & ρ = -.717, respectively). Conclusion: This study provides novel evidence supporting the PDDS as valid PRO of disability in MS.
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Cites
Statistical Power Analysis for the Behavioral Sciences
Muller, K. (1989) · Technometrics · doi:10.1080/00401706.1989.10488618 · Cited by 99,167
Statistical power analysis for the behavioral sciences
(1990) · Computers, Environment and Urban Systems · doi:10.1016/0198-9715(90)90050-4 · Cited by 65,269
Rating neurologic impairment in multiple sclerosis: An expanded disability status scale (EDSS)
Kurtzke, J. F. (1983) · Neurology · doi:10.1212/wnl.33.11.1444 · Cited by 15,011
Diagnostic criteria for multiple sclerosis: 2010 revisions to the McDonald criteria
Polman, C. H., Reingold, S. C., Banwell, B., Clanet, M., Cohen, J. A., Filippi, M., Fujihara, K., Havrdova, E., Hutchinson, M., Kappos, L., et al. (2011) · Annals of Neurology · doi:10.1002/ana.22366 · Cited by 9,802
Diagnostic criteria for multiple sclerosis: 2005 revisions to the “McDonald Criteria”
Polman, C. H., Reingold, S. C., Edan, G., Filippi, M., Hartung, H., Kappos, L., Lublin, F. D., Metz, L. M., McFarland, H. F., O'Connor, P. W., et al. (2005) · Annals of Neurology · doi:10.1002/ana.20703 · Cited by 5,017
Tests for comparing elements of a correlation matrix
Steiger, J. H. (1980) · Psychological Bulletin · doi:10.1037/0033-2909.87.2.245 · Cited by 4,621 · cited 1×
“We examined the significance of differences in the magnitude of dependent correlations between PDDS and EDSS scores with other variables [31]; the significance of differences was based on an alpha value of .”
MethodPaced Auditory Serial-Addition Task: A Measure of Recovery from Concussion
Gronwall, D. M. A. (1977) · Perceptual and Motor Skills · doi:10.2466/pms.1977.44.2.367 · Cited by 2,395 · cited 3×
“The main outcome measure of the PASAT was the total number of correct responses given out of a possible 60 [26].”
BackgroundResultFischer, J. S., Rudick, R. A., Cutter, G. R., Reingold, S. C., & National MS Society Clinical Outcomes Assessment Task Force (1999) · Multiple Sclerosis Journal · doi:10.1177/135245859900500409 · Cited by 993
Measuring the impact of MS on walking ability: The 12-Item MS Walking Scale (MSWS-12)
Hobart, J. C., Riazi, A., Lamping, D. L., Fitzpatrick, R., & Thompson, A. J. (2003) · Neurology · doi:10.1212/wnl.60.1.31 · Cited by 821
Evaluation of the six-minute walk in multiple sclerosis subjects and healthy controls
Goldman, M. D., Marrie, R. A., & Cohen, J. A. (2008) · Multiple Sclerosis Journal · doi:10.1177/1352458507082607 · Cited by 674
Cited by
Remote Physical Activity Monitoring in Neurological Disease: A Systematic Review.
Block, V. A. J., Pitsch, E., Tahir, P., Cree, B. A. C., Allen, D. D., & Gelfand, J. M. (2016) · PLOS ONE · doi:10.1371/journal.pone.0154335 · Cited by 198
“Alzahrani et al, 2012 [84] Undefined > 3 months Intelligent Device for Energy Expenditure and Physical Activity (b*) Walking /gait/ LE physical activity Crosssectional >50 42 N/A 2–6 days Government”
BackgroundRandomised controlled trial of a self-guided online fatigue intervention in multiple sclerosis
Pöttgen, J., Moss-Morris, R., Wendebourg, J.-M., Feddersen, L., Lau, S., Köpke, S., Meyer, B., Friede, T., Penner, I.-K., Heesen, C., et al. (2018) · Journal of Neurology, Neurosurgery & Psychiatry · doi:10.1136/jnnp-2017-317463 · Cited by 129
Cobo-Calvo, A., Tur, C., Otero-Romero, S., Carbonell-Mirabent, P., Ruiz, M., Pappolla, A., Villacieros Alvarez, J., Vidal-Jordana, A., Arrambide, G., Castilló, J., et al. (2023) · Neurology · doi:10.1212/wnl.0000000000207664 · Cited by 65
Riemann-Lorenz, K., Motl, R. W., Casey, B., Coote, S., Daubmann, A., & Heesen, C. (2021) · Disability and Rehabilitation · doi:10.1080/09638288.2020.1731612 · Cited by 30
Self-citationLearmonth, Y. C., Hubbard, E. A., McAuley, E., & Motl, R. W. (2014) · Quality of Life Research · doi:10.1007/s11136-014-0639-2 · Cited by 28
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Metadata
- Authors
- Learmonth, Y. C., Motl, R. W., Sandroff, B. M., Pula, J. H., & Cadavid, D.
- Venue
- BMC Neurology
- Published
- 2013-04-25
- Volume
- 13
- Issue
- 1
- Pages
- 37-37
- ISSN
- 1471-2377 (ISSN-L)
- OpenAlex
- W2018693879
- Cited by
- 773
- References
- 35
- FWCI
- 19.57
- Type
- journal article
- Language
- en
- Open access
- gold
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