Table 1.

Demographics of Coronavirus Disease 2019 Cases in Santa Clara County, California, January–March 2020

	Cases, No. (%)
Characteristic	No Viral WGS (n = 457)a		Viral WGS (n = 101)b		P Valuec
Sex
Female	200	43.8	44	43.6	.93
Male	254	55.6	57	56.4
Age group, y
<20	13	2.8	7	6.9	.03d
21–30	49	10.7	6	5.9
31–40	87	19	14	13.9
41–50	98	21.4	18	17.8
51–60	90	19.7	20	19.8
61–70	52	11.4	15	14.9
>70	66	14.4	21	20.8
Race/ethnicity
Asian/Pacific Islander	111	24.3	39	38.6	.29
Black or African American	8	1.8	2	2
Latinx	154	33.7	36	35.6
White	99	21.7	18	17.8
Other	22	4.8	6	5.9
Deceased
No	429	93.9	85	84.2	.001d
Yes	28	6.1	16	15.8

Abbreviation: WGS, whole-genome sequencing.

^aAmong 558 laboratory-confirmed cases in Santa Clara County, cases without viral WGS (n = 457) include cases with samples unavailable for sequencing (n = 420) and cases that were sequenced but yielded insufficient coverage of the viral genome (n = 37).

^bComplete or near-complete viral genomes were recovered from 101 of 138 samples submitted to the Santa Clara County Public Health Laboratory.

^c P values calculated using the χ ² goodness-of-fit test.

^dSignificant at the P = .05 level.