Ragnhild Stoen

Dr. Ragnhild Stoen


Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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18 December 2019 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
EIEspen Alexander Fürst Ihlen
Espen Alexander Fürst Ihlen
RSRagnhild Stoen
Ragnhild Stoen
LBLynn Boswell
Lynn Boswell
RDRaye-Ann Odegaard DeRegnier
Raye-Ann Odegaard DeRegnier
TFToril Fjørtoft
Toril Fjørtoft
AAAdde Adde
Adde Adde
Background: Early identification of cerebral palsy (CP) during infancy will provide opportunities for early therapies and treatments. The aim of the present study was to present a novel machine-learning model, the Computer-based Infant Movement Assessment (CIMA) model, for clinically feasible early CP prediction based on infant video recordings. Methods: The CIMA model was designed to assess the proportion (%) of CP risk-related movements using a time–frequency decomposition of the movement trajectories of the infant’s body parts. The CIMA model was developed and tested on video recordings from a cohort of 377 high-risk infants at 9–15 weeks corrected age to predict CP status and motor function (ambulatory vs. non-ambulatory) at mean 3.7 years age. The performance of the model was compared with results of the general movement assessment (GMA) and neonatal imaging. Results: The CIMA model had sensitivity (92.7%) and specificity (81.6%), which was comparable to observational GMA or neonatal cerebral imaging for the prediction of CP. Infants later found to have non-ambulatory CP had significantly more CP risk-related movements (median: 92.8%, p = 0.02) compared with those with ambulatory CP (median: 72.7%). Conclusion: The CIMA model may be a clinically feasible alternative to observational GMA.

27 October 2016 in American Journal of Neuroradiology
Verified
Journal Article
Open access
PDF file
CPColleen Peyton
Colleen Peyton
EYE. Yang
E. Yang
MMMichael E Msall
Michael E Msall
AAAdde Adde
Adde Adde
RSRagnhild Stoen
Ragnhild Stoen
ADAlexander Drobyshevsky
Alexander Drobyshevsky
BACKGROUND AND PURPOSE: Very preterm infants (birth weight, <1500 g) are at increased risk of cognitive and motor impairment, including cerebral palsy. These adverse neurodevelopmental outcomes are associated with white matter abnormalities on MR imaging at term-equivalent age. Cerebral palsy has been predicted by analysis of spontaneous movements in the infant termed “General Movement Assessment.” The goal of this study was to determine the utility of General Movement Assessment in predicting adverse cognitive, language, and motor outcomes in very preterm infants and to identify brain imaging markers associated with both adverse outcomes and aberrant general movements. MATERIALS AND METHODS: In this prospective study of 47 preterm infants of 24–30 weeks9 gestation, brain MR imaging was performed at term-equivalent age. Infants underwent T1- and T2-weighted imaging for volumetric analysis and DTI. General movements were assessed at 10–15 weeks9 postterm age, and neurodevelopmental outcomes were evaluated at 2 years by using the Bayley Scales of Infant and Toddler Development III. RESULTS: Nine infants had aberrant general movements and were more likely to have adverse neurodevelopmental outcomes, compared with infants with normal movements. In infants with aberrant movements, Tract-Based Spatial Statistics analysis identified significantly lower fractional anisotropy in widespread white matter tracts, including the corpus callosum, inferior longitudinal and fronto-occipital fasciculi, internal capsule, and optic radiation. The subset of infants having both aberrant movements and abnormal neurodevelopmental outcomes in cognitive, language, and motor skills had significantly lower fractional anisotropy in specific brain regions. CONCLUSIONS: Aberrant general movements at 10–15 weeks9 postterm are associated with adverse neurodevelopmental outcomes and specific white matter microstructure abnormalities for cognitive, language, and motor delays.

25 October 2019 in Journal of Clinical Medicine
Verified
Journal Article
Open access
PDF file
RSRagnhild Stoen
Ragnhild Stoen
LBLynn Boswell
Lynn Boswell
RDRaye-Ann Odegaard DeRegnier
Raye-Ann Odegaard DeRegnier
TFToril Fjørtoft
Toril Fjørtoft
DGDeborah J. Gaebler-Spira
Deborah J. Gaebler-Spira
AAAdde Adde
Adde Adde
Background: Early prediction of cerebral palsy (CP) using the General Movement Assessment (GMA) during the fidgety movements (FM) period has been recommended as standard of care in high-risk infants. The aim of this study was to determine the accuracy of GMA, alone or in combination with neonatal imaging, in predicting cerebral palsy (CP). Methods: Infants with increased risk of perinatal brain injury were prospectively enrolled from 2009–2014 in this multi-center, observational study. FM were classified by two certified GMA observers blinded to the clinical history. Abnormal GMA was defined as absent or sporadic FM. CP-status was determined by clinicians unaware of GMA results. Results: Of 450 infants enrolled, 405 had scorable video and follow-up data until at least 18–24 months. CP was confirmed in 42 (10.4%) children at mean age 3 years 1 month. Sensitivity, specificity, positive and negative predictive values, and accuracy of absent/sporadic FM for CP were 76.2, 82.4, 33.3, 96.8, and 81.7%, respectively. Only three (8.1%) of 37 infants with sporadic FM developed CP. The highest accuracy (95.3%) was achieved by a combination of absent FM and abnormal neonatal imaging. Conclusion: In infants with a broad range of neonatal risk factors, accuracy of early CP prediction was lower for GMA than previously reported but increased when combined with neonatal imaging. Sporadic FM did not predict CP in this study.

17 May 2021 in The American Journal of Bioethics
Verified
Journal Article
Open access
JSJanicke Syltern
Janicke Syltern
LULars Ursin
Lars Ursin
BSBerge Solberg
Berge Solberg
RSRagnhild Stoen
Ragnhild Stoen
Advances in neonatology have led to improved survival for periviable infants. Immaturity still carries a high risk of short- and long-term harms, and uncertainty turns provision of life support into an ethical dilemma. Shared decision-making with parents has gained ground. However, the need to start immediate life support and the ensuing difficulty of withdrawing treatment stands in tension with the possibility of a fair decision-making process. Both the parental “instinct of saving” and “withdrawal resistance” involved can preclude shared decision-making. To help health care personnel and empower parents, we propose a novel approach labeled “postponed withholding.” In the absence of a prenatal advance directive, life support is started at birth, followed by planned redirection to palliative care after one week, unless parents, after a thorough counseling process, actively ask for continued life support. Despite the emotional challenges, this approach can facilitate ethically balanced decision-making processes in the gray zone.

1 April 2016 in Early Human Development
Verified
Journal Article
Closed access
CPColleen Peyton
Colleen Peyton
EYEdward Yang
Edward Yang
MKMasha Kocherginsky
Masha Kocherginsky
AAAdde Adde
Adde Adde
TFToril Fjørtoft
Toril Fjørtoft
MMMichael E Msall
Michael E Msall

1 October 2021 in Early Human Development
Verified
Journal Article
Closed access
CPColleen Peyton
Colleen Peyton
APA. Pascal
A. Pascal
LBLynn Boswell
Lynn Boswell
RDRaye-Ann Odegaard DeRegnier
Raye-Ann Odegaard DeRegnier
TFToril Fjørtoft
Toril Fjørtoft
AAAdde Adde
Adde Adde