Table 1.

Characteristics of included encounters, stratified by the performance of viral testing. Numbers represent N (%) or median (IQR).

	Viral Testing Performed (N=2,247,329)			Viral Testing Not Performed (N=13,014,610)
Period	Prepandemic (N=460,826)	Early Pandemic (N=1,240,807)	Late Pandemic (N= 545,696)	Prepandemic (N=6,850,351)	Early Pandemic (N=3,859,989)	Late Pandemic (N=2,304,270)
Age, median (IQR)	3.1 (1.2–7.0)	3.9 (1.5–8.9)	3.9 (1.4–8.2)	5.4 (2.0–11.0)	6.0 (2.3–12.0)	6.3 (2.6–11.8)
Sex
Male	244,502 (53.1)	650,934 (52.5)	287,506 (52.7)	3,582,195 (52.3)	2,013,729 (52.2)	1,210,866 (52.5)
Female	216,293 (46.9)	589,734 (47.5)	258,146 (47.3)	3,265,764 (47.7)	1,845,593 (47.8)	1,093,032 (47.4)
Primary payor
Public	321,690 (69.8)	870,244 (70.1)	368,823 (67.6)	4,384,208 (64.0)	2,426,974 (62.9)	1,429,287 (62.0)
Private	107,351 (23.3)	312,404 (25.2)	144,850 (26.5)	1,870,020 (27.3)	1,195,300 (31.0)	725,931 (31.5)
Other	26,160 (5.7)	43,151 (3.5)	27,518 (5.0)	352,475 (5.1)	170,557 (4.4)	118,908 (5.2)
Respiratory diagnosis
Named viral infections	155,156 (33.7)	241,817 (19.5)	124,326 (22.8)	82,051 (1.2)	73,604 (1.9)	37,696 (1.6)
URI	78,003 (16.9)	256,626 (20.7)	105,913 (19.4)	621,678 (9.1)	226,412 (5.9)	147,917 (6.4)
Pharyngitis	28,105 (6.1)	71,380 (5.8)	48,279 (8.8)	298,872 (4.4)	79,249 (2.1)	93,123 (4.0)
Bronchiolitis	32,336 (7.0)	56,732 (4.6)	31,955 (5.9)	123,241 (1.8)	45,983 (1.2)	29,154 (1.3)
Pneumonia	13,271 (2.9)	16,128 (1.3)	12,217 (2.2)	58,545 (0.9)	13,823 (0.4)	13,796 (0.6)
Sinusitis	1,299 (0.3)	2,493 (0.2)	1,701 (0.3)	12,762 (0.2)	4,815 (0.1)	4,342 (0.2)
Tonsillitis	813 (0.2)	2,068 (0.2)	1,349 (0.2)	10,106 (0.1)	4,056 (0.1)	3,535 (0.2)

URI, upper respiratory infection. Sex missing in 3,645 (<0.01%) and payor status in 366,088 (2.4%).