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. 2021 Aug 24;11(9):1113.
doi: 10.3390/brainsci11091113.

Survival in the Three Common Variants of Primary Progressive Aphasia: A Retrospective Study in a Tertiary Memory Clinic

Maud Tastevin  1 , Monica Lavoie  1 , Justine de la Sablonnière  1 , Julie Carrier-Auclair  1 , Robert Laforce Jr  1
Affiliations

Survival in the Three Common Variants of Primary Progressive Aphasia: A Retrospective Study in a Tertiary Memory Clinic

Maud Tastevin et al. Brain Sci. .

Abstract

Knowledge on the natural history of the three main variants of primary progressive aphasia (PPA) is lacking, particularly regarding mortality. Moreover, advanced stages and end of life issues are rarely discussed with caregivers and families at diagnosis, which can cause more psychological distress. We analyzed data from 83 deceased patients with a diagnosis of PPA. We studied survival in patients with a diagnosis of logopenic variant (lvPPA), semantic variant (svPPA), or non-fluent variant (nfvPPA) and examined causes of death. From medical records, we retrospectively collected data for each patient at several time points spanning five years before the first visit to death. When possible, interviews were performed with proxies of patients to complete missing data. Results showed that survival from symptom onset and diagnosis was significantly longer in svPPA than in lvPPA (p = 0.002) and nfvPPA (p < 0.001). No relevant confounders were associated with survival. Mean survival from symptom onset was 7.6 years for lvPPA, 7.1 years for nfvPPA, and 12 years for svPPA. The most common causes of death were natural cardio-pulmonary arrest and pneumonia. Aspiration pneumonia represented 23% of deaths in nfvPPA. In conclusion, this pilot study found significant differences in survival between the three variants of PPA with svPPA showing the longest and nfvPPA showing more neurologically-related causes of death.

Keywords: memory clinic; mortality; natural history; primary progressive aphasia; survival.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Follow-up strategy for data extraction.
Figure 2
Figure 2
Disease duration.
Figure 3
Figure 3
Diagnosis latency since onset.
Figure 4
Figure 4
Kaplan–Meier survival curves.
See this image and copyright information in PMC

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