Supplemental Table 1.

Washington State COVID-19 in Pregnancy Collaborative participating sites

Number	Participating site
1	University of Washington Medical Center: Montlake
2	University of Washington Medical Center: Northwest
3	Swedish: Issaquah
4	Swedish: First Hill
5	Swedish: Ballard
6	Swedish: Edmonds
7	University of Washington Valley Medical Center
8	MultiCare: Covington Medical Center
9	MultiCare: Auburn Medical Center
10	MultiCare: Tacoma General Hospital
11	MultiCare: Good Samaritan Hospital
12	MultiCare: Spokane Valley Hospital
13	MultiCare: Deaconess Medical Center
14	EvergreenHealth Medical Center—Kirkland
15	PeaceHealth St. Joseph Medical Center—Bellingham
16	Providence Regional Medical Center—Everett
17	Jefferson Medical Center
18	Legacy Salmon Creek Medical Center
19	Virginia Mason Memorial Hospital
20	Central WA Hospital, Confluence
21	UW Medicine Maternal Fetal Medicine Clinic at Yakima
22	Yakima Valley Farmworkers Clinics: Valley Vista Medical Group
23	Yakima Valley Farmworkers Clinics: Pasco Miramar Health Center
24	Yakima Valley Farmworkers Clinics: Unify Community Health, Mission Avenue
25	Yakima Valley Farmworkers Clinics: Unify Community Health, West Central Community Center
26	Yakima Valley Farmworkers Clinics: Unify Community Health, Northeast Community Center
27	Yakima Valley Farmworkers Clinics: Grandview Medical-Dental Clinic
28	Yakima Valley Farmworkers Clinics: Lincoln Avenue Medical Dental
29	Yakima Valley Farmworkers Clinics: Yakima Medical Dental Clinic
30	Yakima Valley Farmworkers Clinics: Mountain View Women's Clinic
31	Yakima Valley Farmworkers Clinics: Toppenish Medical Dental Clinic
32	Yakima Valley Farmworkers Clinics: Family Medical Center Walla Walla
33	Vancouver Clinic
34	PeaceHealth Southwest Medical Center
35	Mid-Valley Hospital

COVID-19, coronavirus disease 2019.

Lokken et al. Severe acute respiratory syndrome coronavirus 2 infection rate in pregnancy. Am J Obstet Gynecol 2021.