Table 1.

Patient Encounter Characteristics (January 2022–September 2023)

	Total (N = 491 encounters), n (%)
Age at the time of IV contrast study
<1 mo	58 (11.8)
1 to < 6 mo	78 (15.9)
6 to < 12 mo	54 (11.0)
1 to < 2 y	94 (19.1)
2 to < 3 y	103 (21.0)
3 to < 4 y	104 (21.2)
Risk factors of interest
<12 wk of age at the time of IV contrast	89 (18.1)
CHD	161 (32.8)
Prematurity (<37 WGA)	86 (17.5)
VLBW	10 (2.0)
ICU stay	122 (24.8)
Any of the above	217 (44.2)
	Total (N = 446 patients), n (%)
Unique patients with any risk factor	189 (42.4)
Sex assigned at birth
Male	246 (55.2)
Female	200 (44.8)

WGA, weeks gestational age.