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Featured researches published by Damber Nirola.


Seizure-european Journal of Epilepsy | 2016

Quality of life in epilepsy in Bhutan

Altaf Saadi; Bryan Patenaude; Damber Nirola; Sonam Deki; Lhab Tshering; Sarah Clark; Lance Shaull; Tali Sorets; Guenther Fink; Farrah J. Mateen

PURPOSE To assess the quality of life in epilepsy (QOLIE) among adults in the lower middle-income country of Bhutan and assess the potential demographic and clinical associations with better QOLIE. METHODS People with clinically diagnosed epilepsy were prospectively enrolled at the Jigme Dorji Wangchuck National Referral Hospital in Thimphu (2014-2015). Regression models were constructed to assess the potential impact of age, sex, residence in the capital city, wealth quintile, educational attainment, seizure in the prior year, seizures with loss of consciousness, self-reported stigma score, and need for multiple antiepileptic drugs. RESULTS The mean Bhutanese 48.4/100 ± 17.3 [corrected] score among 172 adults (mean age 31.1 years, 93 female) was 48.9/100±17.7. Younger age, lower educational attainment level, and increased self-perceived stigma were each observed to have an independent, negative association with QOLIE (p<0.05), while a patients wealth quintile, sex, seizure frequency, seizure type and number of antiepileptic drugs were not. Education appeared to be most strongly associated with QOL at the high school and college levels. CONCLUSIONS There are potentially modifiable associations with low QOLIE. Addressing the educational level and self-perceived stigma of PWE may have an especial impact. The low QOLIE in Bhutan may reflect cultural approaches to epilepsy, health services, or other factors including those outside of the health sector.


International Health | 2016

Knowledge, attitudes and practices regarding epilepsy in the Kingdom of Bhutan

Kate Brizzi; Sonam Deki; Lhab Tshering; Sarah J. Clark; Damber Nirola; Bryan Patenaude; Erica McKenzie; Hannah C. McLane; Sydney S. Cash; Chencho Dorji; Farrah J. Mateen

OBJECTIVE To assess the knowledge, attitudes and practices of epilepsy among healthcare workers (HCWs) and people with epilepsy (PWE) living in Bhutan. METHODS A survey with similar questions was distributed to HCWs and PWE (2014-2015). Responses were compared between the two groups. A Stigma Scale in Epilepsy Score was tested for an independent association with patient age, sex, years of education and presence of seizure freedom using regression models. RESULTS PWE (n=177), when compared to HCWs (n=75), were more likely to believe that epilepsy is contagious; epilepsy results from karma or past actions; PWE need help in school; and people with epilepsy have spiritual powers (p<0.05 for each comparison). Among people with epilepsy, a higher stigma score was independently associated with lower educational attainment (p=0.006) and presence of a seizure in the prior year (p=0.013), but not age, sex or anti-epileptic drug side effects. CONCLUSIONS While knowledge of epilepsy was overall fairly high, PWE more often held certain stigmatizing beliefs, including theories of contagion and a relationship between seizures and spiritual powers. Higher educational level and seizure freedom were associated with lower stigma, underscoring their importance in stigma reduction.


Epilepsy & Behavior | 2016

Medication prescribing and patient-reported outcome measures in people with epilepsy in Bhutan

Erica McKenzie; Damber Nirola; Sonam Deki; Lhab Tshering; Bryan Patenaude; Sarah J. Clark; Sydney S. Cash; Ronald L. Thibert; Rodrigo Zepeda; Edward Leung; Alice D. Lam; Andrew S. Lim; Jo Mantia; Joseph Cohen; Andrew J. Cole; Farrah J. Mateen

OBJECTIVE The aim of this study was to assess medication prescribing and patient-reported outcomes among people with epilepsy (PWE) in Bhutan and introduce criteria for evaluating unmet epilepsy care needs, particularly in resource-limited settings. METHODS People with epilepsy in Bhutan (National Referral Hospital, 2014-2015) completed a questionnaire, the Quality of Life in Epilepsy Inventory (QOLIE-31), and an electroencephalogram (EEG). Management gap was the proportion of participants meeting any of six prespecified criteria based on best practices and the National Institute for Health and Care Excellence (NICE) guidelines. RESULTS Among 253 participants (53% female, median: 24years), 93% (n=235) were treated with antiepileptic drugs (AEDs). Seventy-two percent (n=183) had active epilepsy (≥1 seizure in the prior year). At least one criterion was met by 55% (n=138) of participants, whereas the treatment gap encompassed only 5% (n=13). The criteria were the following: 1. Among 18 participants taking no AED, 72% (n=13) had active epilepsy. 2. Among 26 adults on subtherapeutic monotherapy, 46% (n=12) had active epilepsy. 3. Among 48 participants reporting staring spells, 56% (n=27) were treated with carbamazepine or phenytoin. 4. Among 101 female participants aged 14-40years, 23% (n=23) were treated with sodium valproate. 5. Among 67 participants reporting seizure-related injuries, 87% (n=58) had active epilepsy. 6. Among 111 participants with a QOLIE-31 score below 50/100, 77% (n=86) had active epilepsy. Years since first AED treatment (odds ratio: 1.07, 95% CI: 1.03, 1.12) and epileptiform discharges on EEG (odds ratio: 1.95, 95% CI: 1.15, 3.29) were significantly associated with more criteria met. CONCLUSIONS By defining the management gap, subpopulations at greatest need for targeted interventions may be prioritized, including those already taking AEDs.


Scientific Reports | 2017

Validation of a smartphone-based EEG among people with epilepsy: A prospective study

Erica McKenzie; Andrew S. Lim; Edward Leung; Andrew J. Cole; Alice D. Lam; Ani Eloyan; Damber Nirola; Lhab Tshering; Ronald L. Thibert; Rodrigo Zepeda Garcia; Esther Bui; Sonam Deki; Liesly Lee; Sarah J. Clark; Joseph Cohen; Jo Mantia; Kate Brizzi; Tali Sorets; Sarah Wahlster; Mia Borzello; Arkadiusz Stopczynski; Sydney S. Cash; Farrah J. Mateen

Our objective was to assess the ability of a smartphone-based electroencephalography (EEG) application, the Smartphone Brain Scanner-2 (SBS2), to detect epileptiform abnormalities compared to standard clinical EEG. The SBS2 system consists of an Android tablet wirelessly connected to a 14-electrode EasyCap headset (cost ~ 300 USD). SBS2 and standard EEG were performed in people with suspected epilepsy in Bhutan (2014–2015), and recordings were interpreted by neurologists. Among 205 participants (54% female, median age 24 years), epileptiform discharges were detected on 14% of SBS2 and 25% of standard EEGs. The SBS2 had 39.2% sensitivity (95% confidence interval (CI) 25.8%, 53.9%) and 94.8% specificity (95% CI 90.0%, 97.7%) for epileptiform discharges with positive and negative predictive values of 0.71 (95% CI 0.51, 0.87) and 0.82 (95% CI 0.76, 0.89) respectively. 31% of focal and 82% of generalized abnormalities were identified on SBS2 recordings. Cohen’s kappa (κ) for the SBS2 EEG and standard EEG for the epileptiform versus non-epileptiform outcome was κ = 0.40 (95% CI 0.25, 0.55). No safety or tolerability concerns were reported. Despite limitations in sensitivity, the SBS2 may become a viable supportive test for the capture of epileptiform abnormalities, and extend EEG access to new, especially resource-limited, populations at a reduced cost.


Epilepsy Research | 2017

Contraception pregnancy and peripartum experiences among women with epilepsy in Bhutan.

Sheliza Halani; Lhab Tshering; Esther Bui; Sarah J. Clark; Sara J. Grundy; Tandin Pem; Sonam Lhamo; Ugyen Dema; Damber Nirola; Chencho Dorji; Farrah J. Mateen

INTRODUCTION Reports on the reproductive health of women with epilepsy (WWE) in low- and middle-income countries (LMICs) are limited. Bhutan is a lower income country with a high estimated prevalence of epilepsy and no out-of-pocket payment requirements for health visits or medications. METHODS We developed a 10-category survey to interview WWE ages 20-59 years in the Kingdom of Bhutan to understand their contraceptive use and peripartum experiences. WWE were recruited from 2016-2017 from an existing epilepsy cohort and their reproductive health data were merged with epilepsy and socioeconomic data obtained from initial clinical evaluations performed between 2014 and 2016. RESULTS Of the 134 WWE eligible for the study, 94 were reachable and there was 1 refusal to participate (response rate 99% among reachable WWE; 69% of all WWE in the cohort). Of the 93 WWE (median age 27 years, range 20-52), 50 (54%) reported prior pregnancies. Of the entire cohort, 55 women responded on contraception: 26 (47%) WWE had never used contraception in their lifetime. Of the 29 WWE who had ever used contraception, the most commonly reported form was male condoms (14/29, 48%), followed by depot medroxyprogesterone acetate injections (13/29, 45%), and intrauterine devices (5/29, 17%). Sixty-three percent of WWE recalled receiving information on family planning (31 of 49). Of the 50 WWE with prior pregnancies, 37 of 46 (80%) used folic acid; 6 WWE reported commencing it in the first trimester while 29 WWE began supplementation in the second trimester. Primary school education or higher was associated with folic acid supplementation during pregnancy (26/29 vs. 11/17, p=0.040). Epilepsy affected at least one of the pregnancies in 38 of the cases (76%) with an average of 2.3 pregnancies per woman). There was a total of 86 pregnancies and an average inter-pregnancy interval of 3.5 years. Ninety-five percent of women attended prenatal care (36/38), 22% had at least one miscarriage (8/37), 14% had at least one pre-term delivery (5/36), and 21% had Caesarean sections (8/38). Seventeen of 38 (45%) of WWE had seizures during pregnancy. A majority of WWE (97%, 37 of 38) with a prior pregnancy reported breastfeeding their infant. CONCLUSIONS Nearly half of Bhutanese WWE did not use contraception; among those who used it, male condoms were most common but 11% were at risk of potential drug-drug interactions between oral contraception and enzyme-inducing antiepileptic drugs. Bhutanese WWE had a high rate of prenatal visits. Folic acid was prescribed in most pregnant WWE but the majority began supplementation in the second trimester. The number of pregnancies in WWE in Bhutan (2.3 per woman) was comparable to the number of children per women in Bhutan (2.3). Breastfeeding was practiced almost universally. Points of intervention may include pre-conception initiation of folic acid, optimization of dosing of AEDs with contraceptives, guidelines for peripartum seizure treatment, and establishment of a prospective registry for WWE and their offspring.


Epilepsy & Behavior | 2017

Areca catechu (palm tree) nut chewing and seizures: An observational study

Farrah J. Mateen; Marco Carone; Lhab Tshering; Chencho Dorji; Ugyen Dema; Sara J. Grundy; Dili Ram Pokhrel; Damber Nirola

OBJECTIVE The objective of this study was to report the impact of chronic abuse of Areca catechu nut wrapped in leaf (also known as doma, quid, paan), the fourth most commonly abused psychoactive substance worldwide, on the frequency of seizures among people with epilepsy. METHODS People with clinically diagnosed epilepsy (>14years old) residing in the Kingdom of Bhutan were surveyed for self-reported Areca catechu use, demographic variables, epilepsy characteristics, and seizure frequency. The relationship between seizure frequency in the prior month and chewing Areca catechu, adjusted for various confounders, was analyzed using multivariable regression models. RESULTS There were 152 people with epilepsy, including 50 chewers (33%) and 102 (67%) nonchewers. The median duration of chewing A. catechu was 62months (25th, 75th percentiles: 24, 120months). Chewers consumed an average of three nuts daily. There was no significant difference between chewers and nonchewers in the mean age, proportion of male vs. female, age at first epileptic seizure, or number of antiepileptic drugs presently taken; chewers were more likely to be rural dwellers (p=0.042). After adjustment for all of the above variables, on average, chewers had 58.7% fewer [95%CI: (-79.4, -17.0)] seizures in the prior month, equating to 2.1 fewer [95% CI: (-3.9, -0.3)] seizures. CONCLUSIONS Our observational study suggests that the social custom of chewing Areca catechu nut is associated with reduced seizure frequency among people with epilepsy. This association may be due to its natural stimulant properties, a novel antiepileptic property of the nut, or has another, yet unknown explanation.


Seizure-european Journal of Epilepsy | 2016

Corrigendum to “Quality of life in epilepsy in Bhutan” [Seizure 39 (2016) 44–48]

Altaf Saadi; Bryan Patenaude; Damber Nirola; Sonam Deki; Lhab Tshering; Sarah Clark; Lance Shaull; Tali Sorets; Guenther Fink; Farrah J. Mateen

The authors regret that there were errors in the final published article. The corrected version is given here: The QOLIE-31 score in the abstract should be 48.4/100 17.3. The first sentence under the Results heading should read: “The QOLIE score in Bhutanese PWE was low (median 48.5, mean 48.4, standard deviation 17.3), with a statistically significantly different overall QOLIE-31 score between male and female participants.” The last sentence under the first paragraph of the Results heading should read: “Of the seven subscales, the seizure worry score had the lowest scores (mean 33.1, SD 24.0). The authors would like to apologise for any inconvenience caused.


Transactions of The Royal Society of Tropical Medicine and Hygiene | 2016

Neurocysticercosis in Bhutan: a cross-sectional study in people with epilepsy

Kate Brizzi; Sonam Pelden; Tshokey Tshokey; Damber Nirola; Megan B. Diamond; Joshua P. Klein; Lhab Tshering; Sonam Deki; Dechen Nidup; Veronica Bruno; Pierre Dorny; Hector H. Garcia; Farrah J. Mateen


Annals of global health | 2017

Yield of Brain MRI in Clinically Diagnosed Epilepsy in the Kingdom of Bhutan: A Prospective Study

Veronica Bruno; Joshua P. Klein; Dechen Nidup; Damber Nirola; Lhab Tshering; Sonam Deki; Sarah J. Clark; Kristin A. Linn; Russell T. Shinohara; Chencho Dorji; Dili Ram Pokhrel; Ugyen Dema; Farrah J. Mateen


Neurology | 2016

The Yield of EEG Studies in a Lower Income Country Epilepsy Referral Center (I14.009)

Janice C. Wong; Sydney S. Cash; Ronald L. Thibert; Esther Bui; Rodrigo Zepeda Garcia; Alice D. Lam; Edward Leung; Liesly Lee; Andrew S. Lim; Jo Mantia; Joseph Cohen; Erica McKenzie; Damber Nirola; Sonam Deki; Lhab Tshering; Tali Sorets; Sarah Clark; Bryan Patenaude; Andrew J. Cole; Farrah J. Mateen

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Andrew S. Lim

Sunnybrook Health Sciences Centre

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Chencho Dorji

University Health Network

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