The concurrent presence of cognitive impairment and possible sarcopenia is associated with a substantially increased risk of all-cause mortality (HR=3.41) and cardiovascular mortality (HR=3.75), especially among women and individuals younger than 70 years.
Key Findings
Results
Participants with both cognitive impairment and possible sarcopenia had the highest all-cause mortality risk, with an adjusted hazard ratio of 3.41 compared to those with neither condition.
Adjusted hazard ratio for CI+/PSP+ group was 3.41 (95% CI: 2.40-4.83) compared to the CI-/PSP- reference group
Kaplan-Meier and multivariable Cox analyses both confirmed the CI+/PSP+ group had the highest mortality risk (P < .001)
The CI+/PSP+ group comprised 657 participants (25.3% of the total sample)
The study used NHANES 2011-2014 data linked to National Death Index mortality records through 2019
Results
Cognitive impairment alone and possible sarcopenia alone were each independently associated with increased all-cause mortality risk.
Adjusted hazard ratio for CI+/PSP- was 1.82 (95% CI: 1.23-2.70) compared to CI-/PSP-
Adjusted hazard ratio for CI-/PSP+ was 1.95 (95% CI: 1.25-3.03) compared to CI-/PSP-
The CI+/PSP- group comprised 716 participants (27.5%) and the CI-/PSP+ group comprised 334 participants (12.8%)
These findings indicate additive or synergistic effects when both conditions coexist
Results
Significantly increased cardiovascular mortality risk was observed only in the group with both cognitive impairment and possible sarcopenia.
Hazard ratio for cardiovascular mortality in CI+/PSP+ group was 3.75 (95% CI: 2.45-5.19)
No significantly increased cardiovascular mortality risk was found in groups with either condition alone
This suggests the co-occurrence of both conditions may be specifically necessary for elevated cardiovascular mortality risk
Results
The associations between the combined CI and possible sarcopenia condition and mortality were stronger among women and individuals younger than 70 years.
Subgroup analyses indicated stronger associations in women compared to men
Stronger associations were also observed in individuals younger than 70 years compared to those aged 70 and older
Sensitivity analyses were performed to evaluate the robustness of findings
Methods
The study sample of 2601 participants was classified into four groups based on cognitive impairment and possible sarcopenia status.
894 participants (34.4%) were CI-/PSP- (neither condition)
716 participants (27.5%) were CI+/PSP- (cognitive impairment only)
334 participants (12.8%) were CI-/PSP+ (possible sarcopenia only)
657 participants (25.3%) were CI+/PSP+ (both conditions)
Possible sarcopenia was defined as low muscle strength assessed by handgrip strength according to established cutoff values, in the absence of direct measurements of muscle mass
What This Means
This research suggests that two common conditions in older adults — cognitive impairment (problems with thinking and memory) and sarcopenia (low muscle strength, sometimes called muscle wasting) — are each individually linked to higher risk of death, but when they occur together, the risk is dramatically higher. Using data from over 2,600 U.S. adults tracked from 2011–2014 until 2019, the study found that people with both conditions were about 3.4 times more likely to die from any cause and 3.75 times more likely to die from cardiovascular causes compared to people with neither condition. People with only one of the two conditions had roughly double the mortality risk, suggesting the two conditions together have a compounding effect on survival.
The findings were particularly striking for women and for people under the age of 70, where the combined effect of both conditions was even more pronounced than in older individuals or men. This is notable because it suggests these conditions interact in ways that may be especially harmful before very old age, potentially offering a window for earlier intervention.
This research suggests that screening older adults for both cognitive impairment and muscle weakness together — rather than separately — could improve the ability to identify who is at highest risk of death. This could help clinicians and public health practitioners prioritize care and design targeted interventions for people carrying both risk factors simultaneously, rather than treating each condition in isolation.
Cao H, Ou J, Gao M, Zhong Y. (2026). The impact of cognitive impairment and possible sarcopenia on mortality: Evidence from a prospective NHANES cohort study.. Medicine. https://doi.org/10.1097/MD.0000000000050350