Table 2.

Characteristics of geriatric patients with COVID-19 and morbidities associated.

Study Type	Frailty Prevalence (%)	Average Age (Years)	Residential Status	Comorbidities	Geriatric Syndromes	Ref.
Retrospective cohort	10%	85	Community	Hypertension 69.1%, Cardiac disease 48.9%, Dementia 45.7%, Respiratory disease 37.2%, Diabetes mellitus 11.7%	ADL dependency 64.9%, IADL dependency 76.1%, Polypharmacy 69.1%, Malnutrition 44.7%	[30]
Cross-sectional	14%	81	NI	Hypertension 58%, Diabetes mellitus 31%, COPD 19%, Dementia 15%, Chronic kidney disease 14%	NI	[21]
Cross-sectional	50% markers frailty	68.7	Community and home residents	Hypertension 45%, obesity 31%, diabetes 23%, dementia 15%	Polypharmacy 30%, Mobility aids 10%, Cognitive impairment 19.4%, Delirium 21%, Falls 8%	[31]
Cross-sectional	67.4% (HFRS>5)	74.1	Community	Hypertension 78.8%, CAD 39.3%, Diabetes mellitus 36.2%, COPD 35.9%, Iron deficiency anemia 27.2%, Cerebrovascular disease 18.9%, Renal failure 8.8%, Depression 21.8%, Cancer 7.8%.	NI	[12]
Cross-sectional	66.9% (CFS > 5)	79.9	Community	Diabetes 28%, CAD 26.9%, Hypertension 56.1%, COPD 14.5%, Heart failure 12.6%	NI	[32]
Retrospective, observational	ND	59	Community	Diabetes mellitus 22.5% Hypertension 38.1% Hyperlipidaemia 44.7% CAD 12.3% CKD 2.9% COPD 6.1%	Polypharmacy 26.5% Chronic pain 7.6% Memory problems 2.5% Nutritional risk 6.9%	[13]
Retrospective cohort	74%	66	Community	Hypertension 54% Diabetes 31% CKD 19% CAD 13% Stroke 9% COPD 5% Dementia 6% Cancer 5%	NI	[33]

Markers frailty: falls, polypharmacy, cognitive impairment, dementia, mobility aids, package of care, care home resident. Activity of daily living (ADL), Instrumental activity of daily living (IADL), Coronary artery disease (CAD), Clinical frailty scale (CFS), Chronic obstructive pulmonary disease (COPD), Chronic kidney disease (CKD), Hospital frailty risk score (HFRS). NI (no information).