Table 2.

Success rate of linkage algorithm by type of match (N = 200,343)

Matching phase	Type of match	Number linked	%
1	Child’s first, middle, and last name & dob and mother’s dob	5282	2.6 %
2	Child’s first, middle initial, and last name & dob and mother’s dob	32094	16.0 %
3	Child’s first, middle, and last name & dob	3035	1.5 %
4	Child’s first, middle initial, and last name & dob	66730	33.3 %
5	Child’s first and last name & dob	90506	45.2 %
6	Child’s first 3 letters of first name and last name & dob	2696	1.3 %