Table 1.

Baseline Characteristics of Included Pediatric Cases (n = 116,362)

	All Participants	< 2 yr old
Cases	116,362	22,455
Age
< 2 mo	2,122 (1.8)	2,122 (9.5)
2–12 mo	11,051 (9.5)	11,051 (49.2)
1 yr	9,282 (8.0)	9,282 (41.3)
2–5 yr	28,359 (24.4)
6–8 yr	16,624 (14.3)
9–11 yr	13,584 (11.7)
≥ 12 yr	35,340 (30.4)
ASA PS
1	59,581 (51.2)	12,620 (56.2)
2	56,781 (48.8)	9,835 (43.8)
Vital signs available
Only preprocedure     start	22,079 (19.0)	4,220 (18.8)
Only postprocedure     start	8,183 (7.0)	1,982 (8.8)
Both	86,100 (74.0)	16,253 (72.4)
Weight (median, IQR)	24.1 (14.0–50.0)	9.1 (6.9–10.9)
Weight known	104,977 (90.2)	20,240 (90.1)
Height (median, IQR)	127 (96–160)	73 (64–79)
Height known	78,242 (67.2)	13,358 (59.5)
Sex
Male	67,501 (58.0)	15,190 (67.6)
Female	48,861 (42.0)	7,265 (32.4)
Surgical service
Otolaryngology	21,636 (18.6)	3,255 (14.5)
Orthopedics	20,153 (17.3)	1,246 (5.5)
Urology	16,473 (14.2)	5,871 (26.1)
General	14,577 (12.5)	4,513 (20.1)
Ophthalmology	10,489 (9.0)	2,140 (9.5)
Plastics	7,898 (6.8)	2,125 (9.5)
Other	25,136 (21.6)	3,305 (14.7)

Values are given as the number of cases (n) and percentage of group (%), unless otherwise stated.

ASA PS = American Society of Anesthesia physical status; IQR = inter-quartile range.