Association Between Finger-to-Nose Kinematics and Upper Extremity Motor Function in Subacute Stroke: A Principal Component Analysis

BackgroundKinematic analysis facilitates interpreting the extent and mechanisms of motor restoration after stroke. This study was aimed to explore the kinematic components of finger-to-nose test obtained from principal component analysis (PCA) and the associations with upper extremity (UE) motor function in subacute stroke survivors.MethodsThirty-seven individuals with subacute stroke and twenty healthy adults participated in the study. Six kinematic metrics during finger-to-nose task (FNT) were utilized to perform PCA. Clinical assessments for stroke participants included the Fugl-Meyer Assessment for Upper Extremity (FMA-UE), Action Research Arm Test (ARAT), and Modified Barthel Index (MBI).ResultsThree principal components (PC) accounting for 91.3% variance were included in multivariable regression models. PC1 (48.8%) was dominated by mean velocity, peak velocity, number of movement units (NMU) and normalized integrated jerk (NIJ). PC2 (31.1%) described percentage of time to peak velocity and movement time. PC3 (11.4%) profiled percentage of time to peak velocity. The variance explained by principal component regression in FMA-UE (R2 = 0.71) were higher than ARAT (R2 = 0.59) and MBI (R2 = 0.29) for stroke individuals.ConclusionKinematic components during finger-to-nose test identified by PCA are associated with UE motor function in subacute stroke. PCA reveals the intrinsic association among kinematic metrics, which may add value to UE assessment and future intervention targeted for kinematic components for stroke individuals.Clinical Trial RegistrationChinese Clinical Trial Registry (http://www.chictr.org.cn/) on 17 October 2019, identifier: ChiCTR1900026656.

Download Full-text

Principal component analysis of upper-extremity joint moment variability during hammering

International Journal of Human Factors and Ergonomics ◽

10.1504/ijhfe.2020.10031665 ◽

2020 ◽

Vol 1 (1) ◽

pp. 1

Author(s):

Joseph E. Langenderfer ◽

Sumaya Ferdous ◽

Nilanthy Balendra

Keyword(s):

Principal Component Analysis ◽

Upper Extremity ◽

Principal Component ◽

Component Analysis ◽

Joint Moment

Download Full-text

INTERPRETATION OF PROPULSIVE FORCE IN TETHERED SWIMMING THROUGH PRINCIPAL COMPONENT ANALYSIS

Revista Brasileira de Medicina do Esporte ◽

10.1590/1517-869220182403175155 ◽

2018 ◽

Vol 24 (3) ◽

pp. 178-181 ◽

Cited By ~ 2

Author(s):

Rodrigo Maciel Andrade ◽

Aylton José Figueira Júnior ◽

Vanessa Metz ◽

Alberto Carlos Amadio ◽

Júlio Cerca Serrão

Keyword(s):

Principal Component Analysis ◽

Principal Component ◽

Component Analysis ◽

Peak Force ◽

Rate Of Force Development ◽

Impulse Generation ◽

Force Development ◽

Time To Peak ◽

Force Time ◽

Minimum Force

ABSTRACT Introduction: Propulsive force in swimming, represented through impulse, is related to performance. However, since the as different biomechanical parameters contribute to impulse generation, coaches have a difficult task when seeking for performance improvement. Objective: Identify the main components involved in impulse generation in the front crawl stroke. Methods: Fourteen swimmers underwent a 10-second all-out fully tethered swimming test. The following parameters were obtained from the force-time curve: minimum force, peak force, mean force, time to peak force, rate of force development and stroke duration. This stage was followed by a principal component analysis. Results: The principal component analysis showed that component 1, predominantly kinetic, was composed of peak force, mean force and rate of force development, and accounted for 49.25% of total impulse variation, while component 2, predominantly temporal, composed of minimum force, stroke duration, and time to peak force, represented 26.43%. Conclusion: Kinetic parameters (peak force, mean force, and rate of force development) are more closely associated with impulse augmentation and, hypothetically, with non-tethered swimming performance. Level of Evidence II; Diagnostic studies - Investigating a diagnostic test.

Download Full-text

Patient-reported benefit of ReSTOR� multi-focal intraocular lenses after cataract surgery: Results of Principal Component Analysis on clinical trial data

Health and Quality of Life Outcomes ◽

10.1186/1477-7525-6-10 ◽

2008 ◽

Vol 6 (1) ◽

pp. 10 ◽

Cited By ~ 9

Author(s):

Gilles Berdeaux ◽

Muriel Viala ◽

Aude Roborel de Climens ◽

Benoit Arnould

Keyword(s):

Clinical Trial ◽

Principal Component Analysis ◽

Cataract Surgery ◽

Clinical Trial Data ◽

Principal Component ◽

Component Analysis ◽

Trial Data ◽

Intraocular Lenses ◽

Patient Reported

Download Full-text

Principal component analysis of upper-extremity joint moment variability during hammering

International Journal of Human Factors and Ergonomics ◽

10.1504/ijhfe.2020.110091 ◽

2020 ◽

Vol 7 (3) ◽

pp. 245

Author(s):

Joseph E. Langenderfer ◽

Sumaya Ferdous ◽

Nilanthy Balendra

Keyword(s):

Principal Component Analysis ◽

Upper Extremity ◽

Principal Component ◽

Component Analysis ◽

Joint Moment

Download Full-text

A German version of the Intermittent Claudication Questionnaire (ICQ): cultural adaptation and validation

VASA ◽

10.1024/0301-1526/a000218 ◽

2012 ◽

Vol 41 (5) ◽

pp. 333-342 ◽

Cited By ~ 3

Author(s):

Kirchberger ◽

Finger ◽

Müller-Bühl

Keyword(s):

Principal Component Analysis ◽

Intermittent Claudication ◽

Completion Time ◽

Short Form ◽

Principal Component ◽

Component Analysis ◽

German Version ◽

Average Completion Time ◽

Sf 36 ◽

Related Quality

Background: The Intermittent Claudication Questionnaire (ICQ) is a short questionnaire for the assessment of health-related quality of life (HRQOL) in patients with intermittent claudication (IC). The objective of this study was to translate the ICQ into German and to investigate the psychometric properties of the German ICQ version in patients with IC. Patients and methods: The original English version was translated using a forward-backward method. The resulting German version was reviewed by the author of the original version and an experienced clinician. Finally, it was tested for clarity with 5 German patients with IC. A sample of 81 patients were administered the German ICQ. The sample consisted of 58.0 % male patients with a median age of 71 years and a median IC duration of 36 months. Test of feasibility included completeness of questionnaires, completion time, and ratings of clarity, length and relevance. Reliability was assessed through a retest in 13 patients at 14 days, and analysis of Cronbachs alpha for internal consistency. Construct validity was investigated using principal component analysis. Concurrent validity was assessed by correlating the ICQ scores with the Short Form 36 Health Survey (SF-36) as well as clinical measures. Results: The ICQ was completely filled in by 73 subjects (90.1 %) with an average completion time of 6.3 minutes. Cronbachs alpha coefficient reached 0.75. Intra-class correlation for test-retest reliability was r = 0.88. Principal component analysis resulted in a 3 factor solution. The first factor explained 51.5 of the total variation and all items had loadings of at least 0.65 on it. The ICQ was significantly associated with the SF-36 and treadmill-walking distances whereas no association was found for resting ABPI. Conclusions: The German version of the ICQ demonstrated good feasibility, satisfactory reliability and good validity. Responsiveness should be investigated in further validation studies.

Download Full-text