<abstract xmlns="http://www.w3.org/1999/xhtml"><sec id="j_joepi-2018-007_s_001"><h3>Introduction.</h3><p>Depressive symptoms are very frequent in the population of patients with epilepsy. Comorbidity between depression and epilepsy is estimated in the range of 9–62%. There are no epidemiological studies in Poland thus far in that area and there is no translated and validated screening tool for depression dedicated for persons with epilepsy (PWEs). In this study we intended to validate the Polish version of the Neurological Disorders Depression Inventory for Epilepsy (NDDI-E), which is a short and accurate scale used in many countries for assessment of depressive symptoms in PWEs.</p></sec><sec id="j_joepi-2018-007_s_002"><h3>Aim.</h3><p>The purpose of the study was to validate the Polish version of NDDI-E scale in the sample of PWEs.</p></sec><sec id="j_joepi-2018-007_s_003"><h3>Material and methods.</h3><p>The consecutive 257 patients with epilepsy (PWEs) who met inclusion and exclusion criteria, were recruited by neurologists-epileptologists during their routine outpatient visits in the period from November 2016 to February 2017. The respondents completed the Polish translated version of NDDI-E scale and were assessed with the MINI-International Neuropsychiatric Interview (MINI, depression module).</p></sec><sec id="j_joepi-2018-007_s_004"><h3>Results.</h3><p>After excluding assessments with missing data, we analyzed data of 253 subjects. Sixty-four patients (25.1%) had current major depressive disorder (MDD) according to the MINI criteria. The Cronbach’s coefficient for the NDDI-E was 0.822. Receiver operating characteristic analyses showed an area under the curve of 0.882 (p &lt; 0.001; asymptotic 95% confidence intervals ranged from 0.832 to 0.932). The cut-off point of 9 corresponded to sensitivity of 0.766 and specificity of 0.858.</p></sec><sec id="j_joepi-2018-007_s_005"><h3>Conclusion.</h3><p>The Polish version of NDDI-E scale after validation with a cut-off 9 points may be a useful tool for diagnosing depression in a Polish population of PWEs.</p></sec></abstract>

Introduction.Depressive symptoms are very frequent in the population of patients with epilepsy. Comorbidity between depression and epilepsy is estimated in the range of 9–62%. There are no epidemiological studies in Poland thus far in that area and there is no translated and validated screening tool for depression dedicated for persons with epilepsy (PWEs). In this study we intended to validate the Polish version of the Neurological Disorders Depression Inventory for Epilepsy (NDDI-E), which is a short and accurate scale used in many countries for assessment of depressive symptoms in PWEs.Aim.The purpose of the study was to validate the Polish version of NDDI-E scale in the sample of PWEs.Material and methods.The consecutive 257 patients with epilepsy (PWEs) who met inclusion and exclusion criteria, were recruited by neurologists-epileptologists during their routine outpatient visits in the period from November 2016 to February 2017. The respondents completed the Polish translated version of NDDI-E scale and were assessed with the MINI-International Neuropsychiatric Interview (MINI, depression module).Results.After excluding assessments with missing data, we analyzed data of 253 subjects. Sixty-four patients (25.1%) had current major depressive disorder (MDD) according to the MINI criteria. The Cronbach’s coefficient for the NDDI-E was 0.822. Receiver operating characteristic analyses showed an area under the curve of 0.882 (p < 0.001; asymptotic 95% confidence intervals ranged from 0.832 to 0.932). The cut-off point of 9 corresponded to sensitivity of 0.766 and specificity of 0.858.Conclusion.The Polish version of NDDI-E scale after validation with a cut-off 9 points may be a useful tool for diagnosing depression in a Polish population of PWEs.

Validation of the Polish version of the Neurological Disorders Depression Inventory for Epilepsy (P-NDDI-E)

Journal of Epileptology

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Introduction.Depressive symptoms are very frequent in the population of patients with epilepsy. Comorbidity between depression and epilepsy is estimated in the...

Number of participants	253
% Female	58.9
% Male	41.1
% Diagnosed with depression	25.3
NDDI-E Age groups (%):
< 21 years	8.7
21–35 years	51.8
36–50 years	24.1
51–65 years	11.1
> 65 years	4.3
Years of treatment (SD)	16.8 (12)
Number of seizures (SD)	1.8 (1.6)

NDDI-E ITEM	1	2	3	4	5	6	Corrected Item-total correlations	CFA Factor loadings
1	1.000						0.495	0.544
2	0.469	1.000					0.595	0.650
3	0.411	0.518	1.000				0.684	0.777
4	0.252	0.381	0.491	1.000			0.530	0.603
5	0.354	0.382	0.518	0.464	1.000		0.609	0.685
6	0.387	0.456	0.558	0.412	0.539	1.000	0.643	0.724

Validation of the Polish version of the Neurological Disorders Depression Inventory for Epilepsy (P-NDDI-E)

Article Category: research-article

Data publikacji: 15 kwi 2019

Zakres stron: 59 - 64

Otrzymano: 16 lut 2018

Przyjęty: 27 gru 2018

DOI: https://doi.org/10.21307/joepi-2018-007

Słowa kluczowe
epilepsy, depression, Polish validation of the NDDI-E

© 2018 Bartlomiej Gmaj et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Demographic information about participants in the study

Inter-item, corrected item-total correlations and factor loadings of NDDI-E (N = 253)

Validation of the Polish version of the Neurological Disorders Depression Inventory for Epilepsy (P-NDDI-E)

Article Category: research-article

Data publikacji: 15 kwi 2019

Zakres stron: 59 - 64

Otrzymano: 16 lut 2018

Przyjęty: 27 gru 2018

DOI: https://doi.org/10.21307/joepi-2018-007

Słowa kluczoweepilepsy, depression, Polish validation of the NDDI-E

© 2018 Bartlomiej Gmaj et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Demographic information about participants in the study

Inter-item, corrected item-total correlations and factor loadings of NDDI-E (N = 253)

Słowa kluczowe
epilepsy, depression, Polish validation of the NDDI-E