Table VII (online only).
Gestational and Postnatal Agea | n | 10th %tile | 25th %tile | 50th %tile | 75th %tile | 90th %tile | Pb |
---|---|---|---|---|---|---|---|
All | 895 | 1.2 | 1.5 | 1.7 | 2.1 | 2.8 | |
<27 weeks | 152 | 1.2 | 1.5 | 1.8 | 2.0 | 2.3 | 0.0002 |
week 1 of life | 77 | 1.5 | 1.7 | 1.9 | 2.2 | 2.4 | |
week 2 of life | 39 | 1.3 | 1.6 | 1.8 | 1.9 | 2.2 | |
week 3 of life | 5 | 1.2 | 1.5 | 1.6 | 1.8 | 3.7 | |
week 4 or more of life | 31 | 1.1 | 1.2 | 1.4 | 1.7 | 2.2 | |
27 to 28 weeks | 81 | 1.5 | 1.6 | 2.0 | 2.4 | 3.4 | 0.03 |
week 1 of life | 52 | 1.5 | 1.6 | 1.9 | 2.3 | 2.6 | |
week 2 of life | 11 | 1.6 | 2.1 | 2.5 | 3.8 | 6.6 | |
week 3 of life | 3 | 1.5 | 1.5 | 2.3 | 2.6 | 2.6 | |
week 4 or more of life | 15 | 1.2 | 1.2 | 1.6 | 2.6 | 3.5 | |
29 to 32 weeks | 106 | 1.4 | 1.6 | 1.8 | 2.2 | 2.9 | 0.62 |
week 1 of life | 56 | 1.5 | 1.6 | 1.9 | 2.2 | 2.8 | |
week 2 of life | 9 | 1.2 | 1.4 | 1.8 | 1.9 | 12.1 | |
week 3 of life | 6 | 1.4 | 1.5 | 1.8 | 3.0 | 4.0 | |
week 4 or more of life | 35 | 1.2 | 1.5 | 1.8 | 2.2 | 2.9 | |
33 to 36 weeks | 115 | 1.3 | 1.5 | 1.8 | 2.1 | 3.4 | 0.04 |
week 1 of life | 79 | 1.4 | 1.5 | 1.8 | 2.3 | 3.8 | |
week 2 of life | 18 | 1.2 | 1.4 | 1.6 | 1.9 | 2.4 | |
week 3 of life | 7 | 1.2 | 1.2 | 1.3 | 2.0 | 2.1 | |
week 4 or more of life | 11 | 0.9 | 0.9 | 1.9 | 2.3 | 2.4 | |
37+ weeks | 438 | 1.2 | 1.4 | 1.6 | 2.0 | 2.6 | 0.0006 |
week 1 of life | 241 | 1.3 | 1.5 | 1.7 | 2.1 | 2.7 | |
week 2 of life | 84 | 1.2 | 1.3 | 1.5 | 1.8 | 2.1 | |
week 3 of life | 37 | 1.2 | 1.3 | 1.5 | 1.9 | 2.6 | |
week 4 or more of life | 76 | 1.1 | 1.4 | 1.6 | 2.0 | 3.2 |
Two values for preterm infants with unspecified gestational age not shown.
P values report tests for differences in median values by week of life using the Kruskal-Wallis test.