Table 1.

Characteristics of DNC subjects

Characteristic	Mean	Median	Range
Ages and follow-up
Age at first visit, d	87.1	79	24-344
Age at last follow-up, y	8.2	8.0	2.0-15.1
Length of follow-up, y	7.1	6.5	1.2-14.8
Hematologic data in 2nd year of life
Blood counts per subject, no.*	2.7	3	1-6
Hemoglobin concentration, g/dL	8.8	8.7	6.1-13
Total leukocyte count, × 103/mm3	14.3	13.4	5.8-34.3

^*Subjects with 1 blood count = 33; 2 counts = 42; 3 counts = 51; 4 counts = 31; 5 counts = 8; and 6 counts = 3.