Validation of a European Spanish-version of the Self-Evaluation of Negative Symptoms (SNS) in patients with schizophrenia

IF 5.2 3区 医学 Q1 PSYCHIATRY
Leticia García-Álvarez , Clara Martínez-Cao , Teresa Bobes-Bascarán , Almudena Portilla , Philippe Courtet , Lorena de la Fuente-Tomás , Ángela Velasco , Leticia González-Blanco , Paula Zurrón-Madera , Eduardo Fonseca-Pedrero , Pilar A. Sáiz , María Paz García-Portilla , Julio Bobes
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引用次数: 1

Abstract

Introduction

Negative symptoms can be grouped into five domains: apathy/avolition, anhedonia, asociality, alogia, and affective flattening. There are few validate self-rated measures that assess these five dimensions. Therefore, this study aimed to validate the Self-Evaluation of Negative Symptoms (SNS) in Spanish patients with schizophrenia.

Material and methods

Cross-sectional, validation study in 104 outpatients with schizophrenia evaluated using the Spanish version of the following scales: Clinical Assessment Interview for Negative Symptoms (CAINS), Positive and Negative Syndrome Scale (PANSS), Clinical Global Impression Scale for Schizophrenia (CGI-SCH), Personal and Social Performance (PSP), Motivation and Pleasure Scale – Self-Report (MAP-SR), 36-item Short-Form Health Survey (SF-36) and the Self-Evaluation of Negative Symptoms (SNS).

Results Reliability

Internal consistency (Cronbach's alpha) was 0.915. Convergent validity: The Pearson correlation coefficient between MAP-SR and SNS Total scores was 0.660 (p < 0.001). For PANSS-N, the correlation was 0.437 (p < 0.005) and with the CAINS-Total was 0.478 (p < 0.005). Divergent validity: The Pearson correlation coefficient between SNS and PSP was r = −0.372 (p  0.001), and with SF-36 Physical and Mental Summary Component scores were r = −0.213 (p = 0.066) and r = −0.144 (p = 0.219), respectively. Discriminant validity: SNS Total scores were significantly statistically different according to the severity of the negative symptomatology rated by the CGI-SCH negative scale (p < 0.001).

Conclusion

The SNS is a reliable and valid instrument to self-rate the five domains of negative symptoms in patients with schizophrenia and seems to be appropriate for use in everyday clinical practice as a complementary measure to the evaluation performed by the clinician.

精神分裂症患者阴性症状自我评价(SNS)的欧洲西班牙文版验证
阴性症状可分为五个领域:冷漠/逃避、快感缺乏、社会性、痛症和情感扁平化。很少有有效的评估这五个维度的自评措施。因此,本研究旨在验证西班牙精神分裂症患者的阴性症状自我评价(SNS)。材料与方法对104例精神分裂症门诊患者进行横断面验证研究,采用西班牙语版以下量表进行评估:阴性症状临床评估面谈(CAINS)、阳性和阴性症状量表(PANSS)、精神分裂症临床总体印象量表(ci - sch)、个人与社会表现量表(PSP)、动机与愉悦量表-自我报告(MAP-SR)、36项简短健康调查(SF-36)和阴性症状自我评价(SNS)。结果信度内部一致性(Cronbach’s alpha)为0.915。收敛效度:MAP-SR与SNS总分的Pearson相关系数为0.660 (p <0.001)。PANSS-N的相关系数为0.437 (p <0.005), CAINS-Total为0.478 (p <0.005)。发散效度:SNS与PSP的Pearson相关系数为r = - 0.372 (p≤0.001),与SF-36的身心总结成分得分分别为r = - 0.213 (p = 0.066)和r = - 0.144 (p = 0.219)。判别效度:SNS总分根据CGI-SCH负性量表评定的负性症状严重程度差异有统计学意义(p <0.001)。结论社交网络是一种可靠、有效的精神分裂症患者阴性症状五域自评工具,适合在日常临床实践中作为临床医生评估的补充措施使用。
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来源期刊
自引率
3.30%
发文量
58
期刊介绍: The Spanish Journal of Psychiatry and Mental Health (SJPMH), incorporated into ISSN 1888-9891, is the official scientific publication of the Spanish Society of Psychiatry and Mental Health. The journal focuses on studying mental illnesses, their pathological processes, and their psychosocial consequences, and aims to disseminate scientific advances in all areas related to mental health and illness. SJPMH accepts unpublished works on psychiatry and mental health, including their medical and social implications. The journal provides space for research in the biological, clinical, and psychosocial fields. Manuscripts undergo peer-review by external reviewers before being accepted for publication. SJPMH is indexed in Index Medicus/Medline, IBECS, Social Sciences Citation Index Journal Citation Reports/Social Sciences Edition, and Current Contents/Social and Behavioral Sciences.
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