Table 1.

Clinical characteristics and method of treatment for COVID-19 patients and for the 2 control groups (selection of patients from dialysis units with at least 1 confirmed COVID-19 patient and all non–COVID-19 patients)

Patients' characteristics	Cases	Selected non–COVID-19 controls	All non–COVID-19 dialysis patients	Missing data
n	1621	25,455	47,048
Age, yr	71.9 (60.8–81.0)	72.6 (62.2–81.7)	72.1 (61.4–81.2)	0
RRT duration, yr	3.3 (1.4–6.9)	3.6 (1.6–7.3)	3.8 (1.8–7.7)	0
Women	36.2	39.2	39.0	0.0
Age, yr
0–64	32.6	30.3	31.8	0.0
65–74	26.3	26.5	26.9	0.0
75–84	26.2	27.6	26.7	0.0
≥85	15.1	15.7	14.7	0.0
Smoker	7.5	11.9	12.3	13.2
Former smoker	23.1	26.9	26.6	13.2
Chronic respiratory disease	15.5	16.3	15.8	2.9
Cancer	9.3	11.5	10.6	2.3
Peripheral vascular disease	23.0	24.3	24.4	3.4
Cerebrovascular disease	12.7	12.9	12.5	2.4
Ischemic heart disease	27.2	28.1	27.1	2.7
Dysrhythmia	21.7	25.0	23.6	2.4
Congestive heart failure	22.6	24.4	23.2	2.5
Totally dependent for transfer	4.6	4.9	4.1	6.6
Need assistance for transfer	15.7	12.7	11.2	6.6
Diabetes	50.8	45.3	44.5	1.0
BMI, kg/m2
<18.5	4.0	5.6	5.2	7.9
18.5–25	37.9	39.6	39.5	7.9
25–30	31.4	30.6	30.8	7.9
≥30	26.6	24.2	24.5	7.9
Albuminemia, g/l
>35	63.1	65.1	67.8	7.2
30–35	25.8	24.2	22.9	7.2
≥35	11.2	10.7	9.3	7.2
Hemodialysis
Hospital	65.0	64.1	54.1	0.0
Outpatient center	22.0	21.4	23.6	0.0
Self-care unit	9.7	7.9	15.9	0.0
Home (includes PD also)	3.3	6.6	6.4	0.0

BMI, body mass index; COVID-19, coronavirus disease 2019; PD, peritoneal dialysis; RRT, renal replacement therapy.

Values are % or median (interquartile range), unless otherwise indicated.