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 circumference | SD scores (±95% CI) | ||||||||
All infants | |||||||||
GA (weeks) | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Birth | 0.06 | −0.69 | −0.38 | 0.02 | −0.65 | −1.01 | −0.86 | −1.15 | −1.22 |
36 weeks | −1.28 | −0.95 | −1.35 | −0.55 | −0.46 | −0.76 | −0.36 | 0.82 | −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) | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Birth | 1.47 | −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) | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
Birth | −1.35 | −0.64 | 0.07 | 0.16 | −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.