Research Paper Volume 13, Issue 3 pp 3254—3268
Examining sleep deficiency and disturbance and their risk for incident dementia and all-cause mortality in older adults across 5 years in the United States
Figure 1. Estimated survival curves displaying the relationships between sleep variables and incident dementia, adjusting for covariates, which were found to be significant in the Cox hazard proportional models. (A) Survival curve from the Cox model examining incident dementia and sleep latency, adjusting for covariates. Sleep latency >30 minutes, as compared to <15 minutes, was associated a greater risk of incident dementia (p<0.05). (B) Survival curve from Cox model examining incident dementia and sleep duration, adjusting for covariates. Sleep duration ≤5 hours, compared to 7-8 hours, was associated a greater risk of incident dementia (p<0.01).