Table 1.

Donor metadata

CohortTerm (PA)Preterm (PA)Longitudinal (PA)Two infants (CA)Pasteurization (PA)
Donor age (years) 32.5 ± 4.2 (29–40) (unknown for 11 donors) 32.5 ± 4.5 (19–38) 33.7 ± 4.3 (29–40) (unknown for one donor) 31.7 ± 3.9 (22–39) (includes age of first and second infant) 30.5 ± 8.3 (19–39) 
Estimated gestation age of infant at delivery (weeks) 39.6 ± 1.1 (37–41) 30.7 ± 3.1 (25–35) 37.9 ± 3.4 (32–41) 38.2 ± 3.4 (25–42) (includes both infants) 36.5 ± 4.4 (30–39) 
Time after delivery of sample collection (days) 74.9 ± 79.6 (14–276) 55.6 ± 100.3 (4–330) 18 ± 11.2 (3–42) 258.3 ± 157.6 (44–688) (includes both infants) 7.5 ± 1 (7–9) 
Race of donor 100% Caucasian 93% Caucasian, 7% Black 100% Caucasian 20% Caucasian, 40% Black, 40% Asian 100% Caucasian 
Ethnicity of donor Unknown Unknown Unknown 40% Hispanic Unknown 
CohortTerm (PA)Preterm (PA)Longitudinal (PA)Two infants (CA)Pasteurization (PA)
Donor age (years) 32.5 ± 4.2 (29–40) (unknown for 11 donors) 32.5 ± 4.5 (19–38) 33.7 ± 4.3 (29–40) (unknown for one donor) 31.7 ± 3.9 (22–39) (includes age of first and second infant) 30.5 ± 8.3 (19–39) 
Estimated gestation age of infant at delivery (weeks) 39.6 ± 1.1 (37–41) 30.7 ± 3.1 (25–35) 37.9 ± 3.4 (32–41) 38.2 ± 3.4 (25–42) (includes both infants) 36.5 ± 4.4 (30–39) 
Time after delivery of sample collection (days) 74.9 ± 79.6 (14–276) 55.6 ± 100.3 (4–330) 18 ± 11.2 (3–42) 258.3 ± 157.6 (44–688) (includes both infants) 7.5 ± 1 (7–9) 
Race of donor 100% Caucasian 93% Caucasian, 7% Black 100% Caucasian 20% Caucasian, 40% Black, 40% Asian 100% Caucasian 
Ethnicity of donor Unknown Unknown Unknown 40% Hispanic Unknown 

Errors (±) represent SD. Number in brackets indicate range. Metadata was not collected from all donors, as indicated. (PA = samples from Pittsburgh, PA; CA = samples from San Diego, CA.)

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