Katherine Turner

Dr. Katherine Turner


Research Focus & Metrics

Academic Career Length

23Years (2004-Present)

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

Representative Publications

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1 June 2018 in The Lancet Neurology
Verified
Journal Article
Closed access
TTTorbjörn Tomson
Torbjörn Tomson
DBDina Battino
Dina Battino
EBErminio Bonizzoni
Erminio Bonizzoni
JCJohn Craig
John Craig
DLDick Lindhout
Dick Lindhout
MZMorteza Zarifi-Oskoie
Morteza Zarifi-Oskoie

28 December 2007 in Epilepsia
Verified
Journal Article
Open access
PDF file
APAda Piazzini
Ada Piazzini
KTKatherine Turner
Katherine Turner
AVAglaia Vignoli
Aglaia Vignoli
RCRaffaele Canger
Raffaele Canger
MCMaria Paola Canevini
Maria Paola Canevini
Summary: Purpose: The aim of the present study was to investigate the possible frontal cognitive dysfunction in patients with juvenile myoclonic epilepsy (JME) and to compare the results with those of patients with frontal lobe epilepsy (FLE) and temporal lobe epilepsy (TLE), as well as with controls. Methods: A total of 50 patients with JME, 40 patients with FLE, 40 patients with TLE, and 40 normal controls, all matched for age, education, and IQ, were administered tests to assess frontal functions (the Word Fluency Test and the Wisconsin Card Sorting Test [WCST]). All participants had a normal intelligence level based on the Wechsler Adult Intelligence Scale, and did not take medications other than antiepileptics (AEDs) or have a psychiatric history. Results: Patients with JME had severe impairment in all administered tasks, similar to that of patients with FLE; TLE patients and controls followed in order. Multiple regression analysis did not disclose any significant effect of clinical variables on the cognitive deficits. Discussion: These results clearly suggest that JME patients can show some frontal dysfunction, which may affect both epileptogenic features and cognitive processes. Further studies are needed to confirm these findings.

2 December 2015 in Orphanet Journal of Rare Diseases
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Journal Article
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AVAglaia Vignoli
Aglaia Vignoli
FBFrancesca La Briola
Francesca La Briola
Angela PeronAngela Peron
Angela Peron
KTKatherine Turner
Katherine Turner
CVChiara Vannicola
Chiara Vannicola
MCMaria Paola Canevini
Maria Paola Canevini
Neuropsychiatric disorders are present in up to 90 % of patients with Tuberous Sclerosis Complex (TSC), and represent an important issue for families. Autism Spectrum Disorder (ASD) is the most common neurobehavioral disease, affecting up to 61 % of patients. The aims of this study were: 1) to assess the prevalence of ASD in a TSC population; 2) to describe the severity of ASD; 3) to identify potential risk factors associated with the development of ASD in TSC patients. We selected 42 individuals over age 4 years with a definite diagnosis of TSC and followed at a TSC clinic in Northern Italy. We collected and reported clinical and genetic data, as well as cognitive level, for each of them. We administered the Social Communication Questionnaire (SCQ) as a reliable screening tool for ASD, and performed comparisons between the average scores and each clinical and genetic feature. Seventeen out of 42 patients (40.5 %) had a score at the SCQ suggestive of ASD (≥15 points). When calculated for each cognitive level category, the average SCQ score tended to be progressively higher in patients with a worse cognitive level, and the number of pathological SCQ scores increased with worsening of intellectual disability. With respect to ASD severity, the scores were equally distributed, indicating that the degree of ASD in TSC patients may have a large variability. By comparing the average SCQ scores with the clinical features, we found statistically significant correlations with epilepsy, seizure onset before age one year, spasms, mutations in TSC2, cognitive level, sleep disorders, and other psychiatric problems, but not with seizure frequency, tubers localization and gender. Our study showed a prevalence of ASD of 40.5 %, confirming the higher risk for this disorder in patients with TSC. However, the severity seems to have a notable variability in TSC patients. Risk factors for ASD are epilepsy, infantile spams, and mutations in TSC2.

8 November 2013 in Epilepsia
Verified
Journal Article
Open access
PDF file
AVAglaia Vignoli
Aglaia Vignoli
FBFrancesca La Briola
Francesca La Briola
KTKatherine Turner
Katherine Turner
GSGiulia Scornavacca
Giulia Scornavacca
VCValentina Chiesa
Valentina Chiesa
MCMaria Paola Canevini
Maria Paola Canevini
Summary: Purpose: Prevalence and long‐term outcome of epilepsy in tuberous sclerosis complex (TSC) is reported to be variable, and the reasons for this variability are still controversial.Methods: We reviewed the clinical characteristics of patients with TSC who were regularly followed since 2000 at the San Paolo Multidisciplinary Tuberous Sclerosis Centre in Milan, Italy. From patient charts we collected data about age at epilepsy onset, seizure frequency and seizure type, history of infantile spasms (IS), epileptic syndrome, evolution to refractory epilepsy or to seizure freedom and/or medication freedom, electroencephalography (EEG) features, magnetic resonance imaging (MRI) findings, cognitive outcome, and genetic background.Key Findings: Among the 160 subjects (120 adults and 40 children), 116 (72.5%) had epilepsy: 57 (35.6%) were seizure‐free, and 59 (36.9%) had drug‐resistant epilepsy. Most seizure‐free patients had a focal epilepsy (89.5%), with 54.4% of them drug resistant for a period of their lives. Epilepsy onset in the first year of life with IS and/or focal seizures was characteristic of the drug‐resistant group of patients, as well as cognitive impairment and TSC2 mutation (p < 0.05). A small group of patients (7 patients, 4.4%) experienced a seizure only once; all of them had normal cognition.Significance: Although epilepsy management can be challenging in TSC, more than one third of patients had their seizures controlled: through monotherapy in 56% and by polytherapy in 32%. Moreover, 12% of the patients became seizure‐free and were off medication. Identifying predictive features of epilepsy and cognitive outcome can ensure better management for patients with TSC and delineate genotype–phenotype correlations.

13 December 2006 in Epilepsia
Verified
Journal Article
Open access
PDF file
APAda Piazzini
Ada Piazzini
MCMaria Paola Canevini
Maria Paola Canevini
KTKatherine Turner
Katherine Turner
RCRosanna Chifari
Rosanna Chifari
RCRaffaele Canger
Raffaele Canger
Summary:  Purpose: To evaluate cognitive function in a group of elderly patients with focal epilepsy versus healthy controls. Methods: A neuropsychological battery assessing major cognitive domains was administered to 40 patients with focal epilepsy aged ≥60 years, and to 40 controls matched for sex, age, and education. Results: Epilepsy patients performed significantly worse in most of the administered tests than controls (p < 0.05). Poor cognitive performances correlated with use of polytherapy. Conclusions: Given the high prevalence of epilepsy in the elderly, our results could have important implications for clinical and research purposes.

10 March 2011 in BMC Neurology
Verified
Journal Article
Open access
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Valeria EdefontiValeria Edefonti
Valeria Edefonti
FBFrancesca Bravi
Francesca Bravi
KTKatherine Turner
Katherine Turner
EBEttore Beghi
Ettore Beghi
MCMaria Paola Canevini
Maria Paola Canevini
APAda Piazzini
Ada Piazzini
The potential effect of age-related factors on health-related quality of life (HRQOL) of patients with epilepsy has rarely been analyzed in the literature. We examined this association in a selected population of 815 adults with epilepsy recruited in the context of a multicentre study for the evaluation of Epi-QoL, one of the first Italian epilepsy-specific measures of HRQOL for adults with epilepsy. The Epi-QoL is a 46-item self-administered questionnaire focusing on six domains, which was successfully tested for reproducibility and validity. Ordinary least-squares regression models were used to assess the relationships between age-related factors (patient's age, age at seizure onset, and duration of epilepsy) and overall Epi-QoL score, controlling for the effect of potential confounders. We fitted simple regression models including each age-related factor alone to assess the independent role of each factor on the overall Epi-QoL score. We also fitted multiple regression models including pairs of age-related factors solely, as well as one or two age-related factors together with the same set of confounders. Simple regression models showed that age and duration of epilepsy were significant negative predictors of the overall Epi-QoL score: the higher was each age-related factor, the lower was the overall Epi-QoL score; age at onset alone was a nonsignificant predictor of the overall Epi-QoL score. Multiple regression models including two age-related factors solely showed that duration of epilepsy was still a significant negative predictor of the overall Epi-QoL score in both pairwise models, whereas age was a significant negative predictor only in the model including age at onset. Age at onset emerged as a significant positive predictor of the overall Epi-QoL score only in the model including age: the higher was age at onset, the higher was the overall Epi-QoL score. Adjusted regression models including either one or two age-related factors and controlling for the selected confounding variables showed that the age-related factors had no significant effect on the overall Epi-QoL score anymore. If no other known correlates of the overall Epi-QoL score are considered, age and duration of epilepsy can be expected to have a significant negative association with HRQOL in epilepsy (with the effect of duration being stronger and more consistent across models than the one of age), whereas age at onset is a positive predictor of the overall HRQOL of limited significance. However, demographic and clinical factors, such as seizure frequency in the preceding 12 months, may provide a better explanation of HRQOL in epilepsy.