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. Author manuscript; available in PMC: 2019 Jun 8.
Published in final edited form as: Dement Geriatr Cogn Disord. 2018 Jun 8;45(3-4):232–242. doi: 10.1159/000488671

Figure 2: Conversion to a more impaired diagnostic group.

Figure 2:

Survival curves were constructed using the Kaplan-Meier method. A Cox proportional hazards model was used to assess the time to conversion for individuals with a sleep disturbance (PSD) versus those without a sleep disturbance (NSD) prior to conversion. The model was adjusted for age, sex, APOE genotype, education level, and sedative/hypnotic use, as well as baseline ADAS-11 score to account for baseline disease stage. The confidence level for statistical inference was 95% (p < 0.05) and FDR correction was performed for multiple comparisons.