Clinical outcomes of older persons and persons with dementia admitted for COVID‐19: findings from the Philippine CORONA Study

Background The coronavirus disease 2019 (COVID‐19) pandemic substantially threatens the health of all populations worldwide, but even more so of vulnerable groups. In our subanalysis of The Philippine CORONA Study, we aimed to determine the impact of older age and dementia on clinically relevant outcomes in COVID‐19 patients. Method We included data that were collected in The Philippine CORONA Study, a multicenter, comparative, retrospective, cohort study of 10,881 adult COVID‐19 patients who were admitted between February 2020 and December 2020. Clinical outcomes analyzed were mortality, respiratory failure, duration of ventilator dependence (DVD), intensive care unit (ICU) admission, length of ICU stay (LICUS), and length of hospital stay (LHS) among older persons (individuals ≥ 60 years old) and persons with dementia admitted for COVID‐19 infection. Result The adjusted hazard ratios (aHRs) for mortality among the mild and severe cases were significantly higher by 3.93, 95% CI [2.81, 5.50] and by 1.81, 95% CI [1.43, 2.93], respectively, in older patients compared to younger adults. The aHRs for respiratory failure in the elderly were significantly increased by 2.65, 95% CI [1.92, 3.68] and by 1.27, 95% CI [1.01, 1.59] among the mild and severe cases, respectively. The aHR for ICU admission in the older group was significantly higher by 1.95, 95% CI [1.47, 2.59] among the mild cases. Older COVID‐19 patients had significantly shorter median DVD and LHS than younger patients. The aHRs for mortality and ICU admission in persons with dementia were significantly higher by 7.25, 95% CI [2.67, 19.68] and by 4.37, 95% CI [1.08, 17.63], respectively, compared to those without dementia. The group with dementia had a significantly longer median LHS than the group without dementia. Conclusion Older age and dementia significantly increased the risk of mortality, respiratory failure, and ICU admission among COVID‐19 patients.