Uma revisão sistemática forneceu uma taxa de incidência agrupada estimada para PDIC de 0.33 por 100,000 pessoas-ano, e uma taxa de prevalência agrupada estimada de 2.81 por 100,000 indivíduos. Há uma heterogeneidade substancial na incidência e prevalência entre estudos individuais devido, em parte, ao uso de diferentes critérios de diagnóstico e pouco reconhecimento das variantes de PDIC.[2]Bunschoten C, Jacobs BC, Van den Bergh PYK, et al. Progress in diagnosis and treatment of chronic inflammatory demyelinating polyradiculoneuropathy. Lancet Neurol. 2019 Aug;18(8):784-94.
http://www.ncbi.nlm.nih.gov/pubmed/31076244?tool=bestpractice.com
[15]Broers MC, Bunschoten C, Nieboer D, et al. Incidence and prevalence of chronic inflammatory demyelinating polyradiculoneuropathy: a systematic review and meta-analysis. Neuroepidemiology. 2019;52(3-4):161-72.
https://karger.com/ned/article/52/3-4/161/226983/Incidence-and-Prevalence-of-Chronic-Inflammatory
http://www.ncbi.nlm.nih.gov/pubmed/30669140?tool=bestpractice.com
[16]Broers MC, Bunschoten C, Drenthen J, et al. Misdiagnosis and diagnostic pitfalls of chronic inflammatory demyelinating polyradiculoneuropathy. Eur J Neurol. 2021 Jun;28(6):2065-73.
https://onlinelibrary.wiley.com/doi/10.1111/ene.14796
http://www.ncbi.nlm.nih.gov/pubmed/33657260?tool=bestpractice.com
A PDIC pode ocorrer em qualquer idade, sendo a idade mais comum de início entre 40 e 60 anos.[1]Van den Bergh PYK, van Doorn PA, Hadden RDM, et al. European Academy of Neurology/Peripheral Nerve Society guideline on diagnosis and treatment of chronic inflammatory demyelinating polyradiculoneuropathy: report of a joint task force - second revision. Eur J Neurol. 2021 Nov;28(11):3556-83.
https://onlinelibrary.wiley.com/doi/10.1111/ene.14959
http://www.ncbi.nlm.nih.gov/pubmed/34327760?tool=bestpractice.com
[5]Hattori N, Misu K, Koike H, et al. Age of onset influences clinical features of chronic inflammatory demyelinating polyneuropathy. J Neurol Sci. 2001 Feb 15;184(1):57-63.
http://www.ncbi.nlm.nih.gov/pubmed/11231033?tool=bestpractice.com
A PDIC é ais comum em homens, com razão de homens/mulheres relatada entre 1.4 e 4.4.[1]Van den Bergh PYK, van Doorn PA, Hadden RDM, et al. European Academy of Neurology/Peripheral Nerve Society guideline on diagnosis and treatment of chronic inflammatory demyelinating polyradiculoneuropathy: report of a joint task force - second revision. Eur J Neurol. 2021 Nov;28(11):3556-83.
https://onlinelibrary.wiley.com/doi/10.1111/ene.14959
http://www.ncbi.nlm.nih.gov/pubmed/34327760?tool=bestpractice.com
[2]Bunschoten C, Jacobs BC, Van den Bergh PYK, et al. Progress in diagnosis and treatment of chronic inflammatory demyelinating polyradiculoneuropathy. Lancet Neurol. 2019 Aug;18(8):784-94.
http://www.ncbi.nlm.nih.gov/pubmed/31076244?tool=bestpractice.com
[15]Broers MC, Bunschoten C, Nieboer D, et al. Incidence and prevalence of chronic inflammatory demyelinating polyradiculoneuropathy: a systematic review and meta-analysis. Neuroepidemiology. 2019;52(3-4):161-72.
https://karger.com/ned/article/52/3-4/161/226983/Incidence-and-Prevalence-of-Chronic-Inflammatory
http://www.ncbi.nlm.nih.gov/pubmed/30669140?tool=bestpractice.com
Não há diferenças conhecidas entre grupos étnicos ou regiões geográficas.