Table 3

Head circumference SD scores (SDS) at birth, 36 weeks postmenstrual age (PMA) and change in SDS (95% CI) from birth to 36 weeks PMA for all infants, female-only and male-only infants (only infants who were still inpatient at 36 weeks PMA and beyond are included in this analysis)

Head circumferenceSD scores (±95% CI)
All infants
 GA (weeks)232425262728293031
 Birth0.06−0.69−0.380.02−0.65−1.01−0.86−1.15−1.22
 36 weeks−1.28−0.95−1.35−0.55−0.46−0.76−0.360.82−0.72
 SDS change−1.34
(−1.96 to −0.72)
−0.26
(−1.50 to 0.98)
−0.98
(−1.37 to 0.85)
−0.58
(−1.70 to 0.55)
0.19
(−0.49 to 0.87)
0.25
(−0.18 to 0.68)
0.50
(0.03 to 0.97)
0.33
(−0.09 to 0.74)
0.50
(−0.07 to 1.07)
Female
 GA (weeks)232425262728293031
 Birth1.47−0.76−0.97−0.80−0.37−0.71−0.57−1.66−1.05
 36 weeks−0.19−2.08−1.32−1.06−0.74−0.58−0.82−1.16−0.68
 SDS change−1.66
(−1.66 to −1.66)
−1.32
(−1.63 to −1.01)
−0.35
(−1.57 to 0.87)
−0.25
(−0.25 to −0.25)
−0.37
(−1.15 to 0.42)
0.13
(−0.45 to 0.71)
−0.25
(−1.42 to 0.92)
0.50
(0.06 to 0.94)
0.37
(−0.31 to 1.05)
Male
 GA (weeks)232425262728293031
 Birth−1.35−0.640.070.16−0.92−1.48−0.96−0.26−1.49
 36 weeks−2.38−0.20−1.39−0.32−0.18−1.04−0.21−0.23−0.79
 SDS change−1.03
(−1.03 to −1.03)
0.44
(−0.89 to 1.78)
−1.45
(−2.40 to −0.51)
−0.63
(−1.66 to 0.40)
0.75
(0.40 to 1.09)
0.44
(−0.06 to 0.94)
0.75
(0.38 to 1.12)
0.03
(−0.64 to 0.69)
0.70
(−0.20 to 1.59)
  • GA, gestational age.