Table 2.

Metrics of data core records linked to ancillary data sets.

	Infants in the Data Core (All Infants with a Regional Newborn Billing Record)	Subset of Infants in the Data Core with a Linked Electronic Health Record
Individuals represented, N	69,290	7,293
Individuals with a linked home visiting record, N (%)	2,430 (3.5%)	859 (11.8%)
No. of home visits, N	48,557	8,802
Individuals with a linked children’s hospital record, N (%)	42,541 (61.4%)	5,063 (69.4%)
No. of pediatric primary care visits, N	8,295	1,941
No. of urgent care visits, N	13,337	1,916
No. of emergency department visits, N	18,214	2,663
No. of inpatient admissions, N	26,788	3,438
Individuals with a linked census tract using geocoding, N (%)	68,884 (99.4%)	7,282 (99.8%)