Table 1.

Demographics, overall and by primary care practice site

	Overall	Site minimum	Site maximum
Number of patients	280 610	432	17 933
Number of visits per patient
Median	6	4	12
Maximum	172	23	172
Age (years)
Median	8.9	4.9	10.6
Sex
% Male	49	43	57
Racea
% Asian	2	0	9
% Black	21	0	96
% Native American	0.3	0	3
% White	51	0	89
% Multiple	0.4	0	6
% Explicit unknown	3	0	9
Ethnicity
% Hispanic	4	0	41

^aDocumentation of race varied by site; some patients had more than 1 category selected.