TABLE 1

Characteristics of Participants by Supplement Type

HDM (N = 247), n (%)Infant Formula (N = 337), n (%)P
Maternal characteristics
 Age, y<.001
  2728 (11.3)98 (29.1)
  27–3286 (34.8)104 (30.9)
  33–3679 (32.0)69 (20.5)
  3654 (21.9)66 (19.6)
 Ethnicity<.001
  Hispanic22 (8.9)104 (30.7)
  Non-Hispanic219 (88.7)223 (66.2)
  Declined6 (2.4)10 (3.0)
 Race<.001
  White202 (81.8)228 (67.7)
  African American4 (1.6)23 (6.8)
  Asian American21 (8.5)27 (8.0)
  Other10 (4.0)25 (7.4)
  Declined10 (4.0)34 (10.1)
 Language<.001
  English236 (95.5)252 (74.8)
  Spanish7 (2.8)54 (16.0)
  Other3 (1.2)28 (8.3)
 Insurance type<.001
  Public57 (22.9)214 (63.1)
  Private187 (75.1)114 (33.6)
  None3 (1.6)9 (2.9)
 Parity, primiparous154 (62.3)122 (36.2)<.001
 Delivery method, vaginal112 (45.3)211 (62.6)<.001
Newborn characteristics
 Birth wt, kg.35
  36771 (28.7)75 (22.3)
  3067–335060 (24.3)87 (25.8)
  3351–366058 (23.5)90 (26.7)
  36658 (23.5)85 (25.2)
 Completed gestational age (wk).01
  Early term (37 + 0/7–38 + 6/7)83 (33.6)119 (35.3)
  Term (39 + 0/7–40 + 6/7)138 (55.9)192 (57.0)
  Late or post term (41 + 0/7–42 + 6/7)26 (10.5)26 (7.7)
 Supplement within 12 h65 (26.3)79 (23.4).48
 Timing of first supplement, day shift132 (53.4)128 (38.0)<.001
 Receipt of phototherapy35 (14.2)8 (2.4)<.001
 Required transfer to NICU5 (2.0)1 (0.3).04
 30-d readmission3 (1.2)5 (1.5).66
  • —, not applicable.