Depression and anxiety following deep brain stimulation in Parkinson's disease: systematic review and meta-analysis.

Abstract:

INTRODUCTION:Deep brain stimulation (DBS) is effective in advanced Parkinson's disease (PD), improving motor symptoms, fluctuations and quality of life. However, adverse psychiatric outcomes have been reported, albeit variably and in an unstandardized fashion. We aimed to summarize the published evidence on the outcomes of anxiety and depressive symptoms in Parkinson's disease patients following DBS, through systematic review and meta-analysis. MATERIAL AND METHODS:PubMed was searched until May 2012 to identify studies assessing anxiety and depressive symptoms in PD patients who underwent bilateral DBS of the subthalamic nucleus (STN) or globus pallidus internus (GPi). Random effects metaanalyses were conducted for groups of at least three studies that were homogeneous regarding the design and the instruments used. RESULTS:63 references were selected; 98.4% provided data on depression, and 38.1% on anxiety assessment scales. Two studies did not discriminate the target; from the remaining 61 references, short-term evaluation was performed in 37 (60.7%), mid-term in 36 (59.0%) and long-term in 5 (8.2%). Data on pre to postop variation was available in 57 (93.4%) reports and 16 (26.2%) presented STNDBS versus different comparison groups: GPi-DBS (n = 4 studies, 25.0%), eligible for surgery (n = 6, 37.5%), and medical treatment (n = 7, 43.8%). DISCUSSION:Improvement of depression and anxiety is apparent after DBS, more pronounced in the short-term, an effect that seems to wane in later assessments. Concerning depression, STN-DBS shows superiority against medical treatment, but not when compared to eligible for surgery control groups. The opposite is apparent for anxiety, as results favor medical treatment over STN-DBS, and STNDBS over eligible for surgery control group. Superiority of one target over the other is not evident from the results, but data slightly favors GPi for both outcomes. CONCLUSION:The pattern and course of depressive symptoms and anxiety following DBS in PD is not clear, although both seem to improve in the short-term, especially depression following STN-DBS. RESULTS are highly heterogeneous. Efforts should be carried out to standardize assessment procedures across centers. KEYWORDS:Parkinson's Disease; Deep Brain Stimulation; Anxiety; Depression; Meta-Analysis. :Introdução: A estimulação cerebral profunda (ECP) é eficaz na doença de Parkinson (DP) avançada, melhorando sintomas motores, flutuações e a qualidade de vida. No entanto, têm sido reportados efeitos adversos psiquiátricos, mas de uma forma variável e não padronizada. O objectivo deste artigo é analisar e sumarizar a evidência publicada sobre sintomas depressivos e ansiedade em doentes com DP após ECP, através de revisão sistemática e meta-análise. Material e Métodos: A PubMed foi pesquisada até Maio 2012 para identificar os estudos que avaliaram sintomas depressivos e ansiedade em doentes com doença de Parkinson submetidos a estimulação cerebral profunda bilateral do núcleo subtalâmico (NST) ou globo pálido interno (GPi). Foram feitas meta-análises com modelo de efeitos aleatórios para grupos de pelo menos três estudos homogéneos em relação ao desenho e instrumentos utilizados. Resultados: Foram selecionadas 63 referências; 98,4% continham dados relativos a escalas de avaliação de depressão e 38,1% relativos a ansiedade. Dois estudos não discriminavam o alvo usado; nos restantes 61 foi feita avaliação de curto prazo em 37 (60,7%), de médio prazo em 36 (59,0%) e de longo prazo em 5 (8,2%). Foram encontrados dados sobre variação pré/pós operatória em 57 (93,4%) estudos e 16 (26,2%) continham dados comparando ECP-NST versus outros grupos: ECP-GPi (n = 4 estudos, 25,0%), elegíveis para cirurgia (n = 6, 37,5%), e tratamento médico (n = 7, 43,8%). Discussão: É aparente a melhoria de depressão e ansiedade após ECP, sobretudo a curto prazo, efeito que tende a esbater-se em avaliações posteriores. Em relação à depressão a ECP-NST mostrou-se superior ao tratamento médico, mas não em comparação com o grupo de controlo elegível para cirurgia. Verificou-se o resultado oposto para a ansiedade, uma vez que os resultados favorecem o tratamento médico sobre a ECP-NST, e esta sobre o grupo de elegíveis para cirurgia. Não é evidente a superioridade de um alvo sobre o outro, mas os dados favorecem ligeiramente o GPi para ambos os tipos de sintomas. Conclusões: O padrão e curso dos sintomas depressivos e ansiedade após ECP na DP não são claros, mas ambos parecem melhorar no curto prazo, especialmente a depressão após a ECP-NST. Os resultados são bastante heterogéneos. Devem ser promovidos esforços no sentido de haver padronização de procedimentos de avaliação nos vários centros.

journal_name

Acta Med Port

journal_title

Acta medica portuguesa

authors

Couto MI,Monteiro A,Oliveira A,Lunet N,Massano J

doi

10.20344/amp.4928

subject

Has Abstract

pub_date

2014-05-01 00:00:00

pages

372-82

issue

3

eissn

0870-399X

issn

1646-0758

journal_volume

27

pub_type

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