Table 1.

Population Demographics

Characteristics	Full Cohort (n = 346), %a	Inpatient, %a				Ambulatory, %a
		All (n = 39)	Mild (n = 7)	Moderate (n = 17)	Severe (n = 15)	All (n = 307)	Emergency Department (n = 20)	Outpatient Encounter (n = 287)
Age, mean y ±SD	45 ± 18	59 ± 19	42 ± 16	66 ± 14	58 ± 20	44 ± 17	51 ± 19	43 ± 17
Male	49	46	29	47	53	49.5	55	49
Mean Charlson comorbidity index ± SD	2 ± 3	4 ± 4	3 ± 4	4 ± 4	4 ± 3	2 ± 3	2 ± 3	2 ± 3
Length of stay, mean d ±SD	N/A	8.5 ± 5	2.6 ± 0.7	9.1 ± 4.7	11.5 ± 3.5	N/A	N/A	N/A
Risk factors
Nursing home bound	2	3	0	0	7	2	10	2
Diabetes	15	31	14	41	27	2	10	13
Hypertension	18	23	0	35	20	18	30	17
Heart failure	3	13	0	24	7	2	15	1
Hyperlipidemia	16	18	0	29	13	15	10	16
Obesity	21	36	14	35	47	19	10	19
Malignancy	3	15	14	12	20	2	5	2
Lung disease	8	18	0	24	20	7	0	8
Age >65 y	10	36	14	53	27	7	25	6
CKD	3	13	14	18	7	2	5	2
Immunocompromising condition	3	5	0	6	7	3	0	3
No risk factors	53	23	71	12	12	57	50	57
1–2 risk factors	30	33	14	24	53	30	25	30
3–5 risk factors	15	38	14	53	33	12	25	11
>5 risk factors	2	5	0	12	0	1	0	1

Note. N/A, not available; SD, standard deviation; CKD, chronic kidney disease.

^a Units unless otherwise specified.