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. Author manuscript; available in PMC: 2021 Dec 21.
Published in final edited form as: J Pediatr. 2016 May 11;174:104–110. doi: 10.1016/j.jpeds.2016.03.074

Table 1.

Characteristics of 119 Caregiver-Preterm Infant Pairs

Infant characteristics N = 119
Birth weight, grams
 mean (SD) 1260 (320)
 median (upper and lower extremes) 1300 (466,1745)

Gestational age, weeks
 mean (SD) 29.6 (2.4)
 median (upper and lower extremes) 30 (24,34)

PMA at discharge, weeks
 mean (SD) 36.1 (1.9)
 median (upper and lower extremes) 36 (32,41)

Sex, N (%)
 Male 56 (47)
 Female 63 (53)

Received mechanical ventilation, N (%)
 Yes 85 (71)
 No 34 (29)

Mother characteristics

Age at delivery, years
 mean (SD) 29.2 (6.0)
 median (upper and lower extremes) 29 (15,43)

Race/ethnicity, N (%)
 White 54 (46)
 Black 23 (20)
 Hispanic 16 (14)
 Asians 20 (17)
 Other 5 (4)

Education
 Did not complete HS or obtain GED 12 (10)
 High school/GED 50 (43)
 Some college 29 (25)
 College or beyond 26 (22)

Any smoking during pregnancy, N (%)
 Yes 28 (24)
 No 89 (76)

Any alcohol during pregnancy, N (%)
 Yes 62 (53)
 No 55 (47)

Characteristics of the post-discharge NCAFS Feeding Assessment

Infant PMA at the NCAFS Feeding Assessment, weeks
 mean (SD) 53.0 (5.9)
 median (upper and lower extremes) 56 (39,59)

Type of caregiver present, N (%)
 Mother 102 (86)
 Non-mother 17 (14)

Mode of infant feeding, N (%)
 Directly breastfed 13 (11)
 Did not directly breastfeed 106 (89)

Caregiver-Preterm Infant Feeding Interaction (Total NCAFS)
 mean (SD) 62.1 (8.5)
 median (upper and lower extremes) 64 (38,76)

Caregiver Feeding Domains

 Sensitivity to Cues (0 to 16 points)
  mean (SD) 14.1 (2.0)
  median (upper and lower extremes) 15 (7,16)

 Responsive to Distress (0 to 11 points)
   mean (SD) 10.2 (1.3)
   median (upper and lower extremes) 11 (4,11)

 Social/Emotional Growth Fostering (0 to 14 points)
   mean (SD) 11.4 (2.2)
   median (upper and lower extremes) 12 (6,14)

 Cognitive Growth Fostering (0 to 9 points)
   mean (SD) 6.7 (2.2)
   median (upper and lower extremes) 8 (1, 9)

Preterm Infant Feeding Domains

 Clarity of Cues (0 to 15 points)
   mean (SD) 12.5 (1.6)
   median (upper and lower extremes) 13 (9,15)

  Responsiveness to Caregiver (0 to 11 points)
   mean (SD) 7.3 (2.2)
   median (upper and lower extremes) 8 (2,11)

Characteristics of the one year neurodevelopmental Follow-up

Infant PMA at the neurodevelopmental follow-up, weeks
  mean (SD) 92.3 (1.8)
  median (upper and lower extremes) 92 (87,96)

Bayley II MDI
  mean (SD) 97.7 (11.1)
  median (upper and lower extremes) 96 (72,125)

Bayley II PDI
  mean (SD) 94.3 (15.8)
  median (upper and lower extremes) 93 (50,149)

SD = standard deviation, PMA = post-menstrual age, HS = high school, GED = general education development, NCAFS = Nursing Child Assessment Feeding Scale, MDI = mental developmental index; PDI = psychomotor developmental index