Image from Google Jackets

White matter integrity and processing speed in sickle cell anaemia

By:

Wilkey, O.B

Publication details: 2018Uniform titles:

Neurology

Online resources:

Summary: <h4>OBJECTIVE: The purpose of this retrospective cross-sectional study was to investigate whether changes in white matter integrity are related to slower processing speed in sickle cell anemia.</h4><h4>METHODS: Thirty-seven patients with silent cerebral infarction, 46 patients with normal MRI, and 32 sibling controls (age range 8-37 years) underwent cognitive assessment using the Wechsler scales and 3-tesla MRI. Tract-based spatial statistics analyses of diffusion tensor imaging (DTI) and neurite orientation dispersion and density imaging (NODDI) parameters were performed.</h4><h4>RESULTS: Processing speed index (PSI) was lower in patients than controls by 9.34 points (95% confidence interval: 4.635-14.855, p = 0.0003). Full Scale IQ was lower by 4.14 scaled points (95% confidence interval: -1.066 to 9.551, p = 0.1), but this difference was abolished when PSI was included as a covariate (p = 0.18). There were no differences in cognition between patients with and without silent cerebral infarction, and both groups had lower PSI than controls (both p < 0.001). In patients, arterial oxygen content, socioeconomic status, age, and male sex were identified as predictors of PSI, and correlations were found between PSI and DTI scalars (fractional anisotropy r = 0.614, p < 0.00001; r = -0.457, p < 0.00001; mean diffusivity r = -0.341, p = 0.0016; radial diffusivity r = -0.457, p < 0.00001) and NODDI parameters (intracellular volume fraction r = 0.364, p = 0.0007) in widespread regions.</h4><h4>CONCLUSION: Our results extend previous reports of impairment that is independent of presence of infarction and may worsen with age. We identify processing speed as a vulnerable domain, with deficits potentially mediating difficulties across other domains, and provide evidence that reduced processing speed is related to the integrity of normal-appearing white matter using microstructure parameters from DTI and NODDI.</h4>

Holdings
Item type	Home library	Collection	Class number	Status	Date due	Barcode
UNKNOWN	Ferriman information and Library Service (North Middlesex) Online	Staff publications for NMDX		Available

NMUH Staff Publications

<h4>OBJECTIVE: The purpose of this retrospective cross-sectional study was to investigate whether changes in white matter integrity are related to slower processing speed in sickle cell anemia.</h4><h4>METHODS: Thirty-seven patients with silent cerebral infarction, 46 patients with normal MRI, and 32 sibling controls (age range 8-37 years) underwent cognitive assessment using the Wechsler scales and 3-tesla MRI. Tract-based spatial statistics analyses of diffusion tensor imaging (DTI) and neurite orientation dispersion and density imaging (NODDI) parameters were performed.</h4><h4>RESULTS: Processing speed index (PSI) was lower in patients than controls by 9.34 points (95% confidence interval: 4.635-14.855, p = 0.0003). Full Scale IQ was lower by 4.14 scaled points (95% confidence interval: -1.066 to 9.551, p = 0.1), but this difference was abolished when PSI was included as a covariate (p = 0.18). There were no differences in cognition between patients with and without silent cerebral infarction, and both groups had lower PSI than controls (both p &lt; 0.001). In patients, arterial oxygen content, socioeconomic status, age, and male sex were identified as predictors of PSI, and correlations were found between PSI and DTI scalars (fractional anisotropy r = 0.614, p &lt; 0.00001; r = -0.457, p &lt; 0.00001; mean diffusivity r = -0.341, p = 0.0016; radial diffusivity r = -0.457, p &lt; 0.00001) and NODDI parameters (intracellular volume fraction r = 0.364, p = 0.0007) in widespread regions.</h4><h4>CONCLUSION: Our results extend previous reports of impairment that is independent of presence of infarction and may worsen with age. We identify processing speed as a vulnerable domain, with deficits potentially mediating difficulties across other domains, and provide evidence that reduced processing speed is related to the integrity of normal-appearing white matter using microstructure parameters from DTI and NODDI.</h4>&nbsp;

There are no comments on this title.

to post a comment.

Storage	Name	Value	Expiration	Description
Cookie	CGISESSID	Session ID	Until logout or end of session	Session cookie
Cookie	KohaOpacLanguage	Language code	3 years	Stores the language the user selected, so the online catalog will appear in that same language the next time it is visited.
Cookie	form_serialized form_serialized_limits	Search terms and limits	End of session or when the advanced search page is accessed again.	jQuery cookie. Stores search terms and limits of the last advanced search. Set when an advanced search is submitted.
Cookie	search_path_code	ads (fewer) or exs (more)	End of session or when the advanced search page is accessed again.	jQuery cookie. Related to serialized_form* cookies. Stores if the advanced search form was used with 'More options' or 'Fewer options'.
Cookie	num_paragraph	Count of search options added	End of session or when the advanced search page is accessed again.	jQuery cookie. Used to store the number of created options when user selects 'More options' in advanced search to increase search boxes.
Cookie	bib_list	List of record IDs (biblionumbers) separated by /	End of session or until the cart is emptied.	Stores cart contents in the online catalog. Set when records are added to the cart for the first time.