Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speech
Beta-amyloid (Aβ) deposition can be observed in primary progressive aphasia (PPA) and progressive apraxia of speech (PAOS). While it is typically associated with logopenic PPA, there are exceptions that make predicting Aβ status challenging based on clinical diagnosis alone. We aimed to determine wh...
Main Authors: | , , , , , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Elsevier
2016-01-01
|
Series: | NeuroImage: Clinical |
Subjects: | |
Online Access: | http://www.sciencedirect.com/science/article/pii/S2213158216300146 |
id |
doaj-4019c19b665442499c47be0ada672069 |
---|---|
record_format |
Article |
spelling |
doaj-4019c19b665442499c47be0ada6720692020-11-24T22:40:41ZengElsevierNeuroImage: Clinical2213-15822016-01-0111C909810.1016/j.nicl.2016.01.014Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speechJennifer L. Whitwell0Stephen D. Weigand1Joseph R. Duffy2Edythe A. Strand3Mary M. Machulda4Matthew L. Senjem5Jeffrey L. Gunter6Val J. Lowe7Clifford R. Jack Jr.8Keith A. Josephs9Department of Radiology, Mayo Clinic, Rochester, MN, USADepartment of Health Sciences Research (Biostatistics), Mayo Clinic, Rochester, MN, USADepartment of Neurology, Mayo Clinic, Rochester, MN, USADepartment of Neurology, Mayo Clinic, Rochester, MN, USADepartment of Psychiatry and Psychology (Neuropsychology), Mayo Clinic, Rochester, MN, USADepartment of Information Technology, Mayo Clinic, Rochester, MN, USADepartment of Information Technology, Mayo Clinic, Rochester, MN, USADepartment of Radiology, Mayo Clinic, Rochester, MN, USADepartment of Radiology, Mayo Clinic, Rochester, MN, USADepartment of Neurology, Mayo Clinic, Rochester, MN, USABeta-amyloid (Aβ) deposition can be observed in primary progressive aphasia (PPA) and progressive apraxia of speech (PAOS). While it is typically associated with logopenic PPA, there are exceptions that make predicting Aβ status challenging based on clinical diagnosis alone. We aimed to determine whether MRI regional volumes or clinical data could help predict Aβ deposition. One hundred and thirty-nine PPA (n = 97; 15 agrammatic, 53 logopenic, 13 semantic and 16 unclassified) and PAOS (n = 42) subjects were prospectively recruited into a cross-sectional study and underwent speech/language assessments, 3.0 T MRI and C11-Pittsburgh Compound B PET. The presence of Aβ was determined using a 1.5 SUVR cut-point. Atlas-based parcellation was used to calculate gray matter volumes of 42 regions-of-interest across the brain. Penalized binary logistic regression was utilized to determine what combination of MRI regions, and what combination of speech and language tests, best predicts Aβ (+) status. The optimal MRI model and optimal clinical model both performed comparably in their ability to accurately classify subjects according to Aβ status. MRI accurately classified 81% of subjects using 14 regions. Small left superior temporal and inferior parietal volumes and large left Broca's area volumes were particularly predictive of Aβ (+) status. Clinical scores accurately classified 83% of subjects using 12 tests. Phonological errors and repetition deficits, and absence of agrammatism and motor speech deficits were particularly predictive of Aβ (+) status. In comparison, clinical diagnosis was able to accurately classify 89% of subjects. However, the MRI model performed well in predicting Aβ deposition in unclassified PPA. Clinical diagnosis provides optimum prediction of Aβ status at the group level, although regional MRI measurements and speech and language testing also performed well and could have advantages in predicting Aβ status in unclassified PPA subjects.http://www.sciencedirect.com/science/article/pii/S2213158216300146Beta-amyloidPrimary progressive aphasiaApraxia of speechVolumetric MRI |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jennifer L. Whitwell Stephen D. Weigand Joseph R. Duffy Edythe A. Strand Mary M. Machulda Matthew L. Senjem Jeffrey L. Gunter Val J. Lowe Clifford R. Jack Jr. Keith A. Josephs |
spellingShingle |
Jennifer L. Whitwell Stephen D. Weigand Joseph R. Duffy Edythe A. Strand Mary M. Machulda Matthew L. Senjem Jeffrey L. Gunter Val J. Lowe Clifford R. Jack Jr. Keith A. Josephs Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speech NeuroImage: Clinical Beta-amyloid Primary progressive aphasia Apraxia of speech Volumetric MRI |
author_facet |
Jennifer L. Whitwell Stephen D. Weigand Joseph R. Duffy Edythe A. Strand Mary M. Machulda Matthew L. Senjem Jeffrey L. Gunter Val J. Lowe Clifford R. Jack Jr. Keith A. Josephs |
author_sort |
Jennifer L. Whitwell |
title |
Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speech |
title_short |
Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speech |
title_full |
Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speech |
title_fullStr |
Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speech |
title_full_unstemmed |
Clinical and MRI models predicting amyloid deposition in progressive aphasia and apraxia of speech |
title_sort |
clinical and mri models predicting amyloid deposition in progressive aphasia and apraxia of speech |
publisher |
Elsevier |
series |
NeuroImage: Clinical |
issn |
2213-1582 |
publishDate |
2016-01-01 |
description |
Beta-amyloid (Aβ) deposition can be observed in primary progressive aphasia (PPA) and progressive apraxia of speech (PAOS). While it is typically associated with logopenic PPA, there are exceptions that make predicting Aβ status challenging based on clinical diagnosis alone. We aimed to determine whether MRI regional volumes or clinical data could help predict Aβ deposition. One hundred and thirty-nine PPA (n = 97; 15 agrammatic, 53 logopenic, 13 semantic and 16 unclassified) and PAOS (n = 42) subjects were prospectively recruited into a cross-sectional study and underwent speech/language assessments, 3.0 T MRI and C11-Pittsburgh Compound B PET. The presence of Aβ was determined using a 1.5 SUVR cut-point. Atlas-based parcellation was used to calculate gray matter volumes of 42 regions-of-interest across the brain. Penalized binary logistic regression was utilized to determine what combination of MRI regions, and what combination of speech and language tests, best predicts Aβ (+) status. The optimal MRI model and optimal clinical model both performed comparably in their ability to accurately classify subjects according to Aβ status. MRI accurately classified 81% of subjects using 14 regions. Small left superior temporal and inferior parietal volumes and large left Broca's area volumes were particularly predictive of Aβ (+) status. Clinical scores accurately classified 83% of subjects using 12 tests. Phonological errors and repetition deficits, and absence of agrammatism and motor speech deficits were particularly predictive of Aβ (+) status. In comparison, clinical diagnosis was able to accurately classify 89% of subjects. However, the MRI model performed well in predicting Aβ deposition in unclassified PPA. Clinical diagnosis provides optimum prediction of Aβ status at the group level, although regional MRI measurements and speech and language testing also performed well and could have advantages in predicting Aβ status in unclassified PPA subjects. |
topic |
Beta-amyloid Primary progressive aphasia Apraxia of speech Volumetric MRI |
url |
http://www.sciencedirect.com/science/article/pii/S2213158216300146 |
work_keys_str_mv |
AT jenniferlwhitwell clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT stephendweigand clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT josephrduffy clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT edytheastrand clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT marymmachulda clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT matthewlsenjem clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT jeffreylgunter clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT valjlowe clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT cliffordrjackjr clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech AT keithajosephs clinicalandmrimodelspredictingamyloiddepositioninprogressiveaphasiaandapraxiaofspeech |
_version_ |
1725703859920175104 |