EXHIBIT 1.

Characteristics of residents with COVID-19 in a sample of US nursing homes, March 16-November 15, 2020

Characteristics	Number/median/ meana	Percent/ IQR/SDb
Median age, years (IQR)	79	69–88
Age, years
Less than 65	1,916	16
65–69	1,239	10
70–74	1,538	13
75–79	1,611	13
80–84	1,726	14
85–89	1,814	15
90 or older	2,304	19
Female sex	7,538	61
Race
White	8,586	70
Black	1,978	16
Other	1,707	14
Mean ADL score (SD)c	16.7	6.2
ADL dependency score quartile
0–13	3,069	25
14–18	3,057	25
20–21	2,766	23
22–28	3,379	28
CFS score
1	4,761	39
2	2,796	23
3	3,558	29
4	1,064	9
Postacute patient	1,631	13
Chronic conditions
Dementia	5,599	46
Heart failure	2,691	22
Coronary artery disease	2,816	23
COPD or asthmad	2,987	24
Chronic kidney diseasee	3,155	26
Hypertension	9,526	78
Diabetes	4,775	39
Symptoms at presentation
Any symptomf	5,645	46
Fever	2,936	24
Tachycardia	959	8
Hypoxia	974	8
Shortness of breath	567	5

SOURCE Authors’ analysis of resident-level data from 282 nursing homes operated by a large long-term care provider.

NOTES N = 12,271 residents. IQR is interquartile range. SD is standard deviation. ADL is activities of daily living. CFS is Cognitive Function Scale. COPD is chronic obstructive pulmonary disease.

^aNumber unless otherwise indicated.

^bPercent unless otherwise indicated.

^cRange: 0–28.

^dClassified in the Minimum Data Set as “asthma, chronic obstructive pulmonary disease, chronic bronchitis, and restrictive lung diseases.”

^eClassified in the Minimum Data Set as "renal insufficiency, renal disease, or end-stage renal disease."

^fResidents were classified as symptomatic if any of the following symptoms were present during the five days before their first positive test or during the fourteen days afterward: cough, sore throat, nasal congestion, rhinorrhea, fever, shortness of breath, chest congestion, nausea, vomiting, diarrhea, anosmia, malaise, confusion, tachycardia, and hypoxia. See the Study Data And Methods section for further details.