Table 2 Differences in weight, length, and bone mineral density (BMD) between preterm infants and full-term peers during 1 to 12 months of corrected age

Length (cm)

P for trend

1–12 months

Reference

−1.60 (−1.80, −1.40)

−2.87 (−3.11, −2.63)

−4.84 (−5.11, −4.57)

−6.77 (−7.14, −6.40)

<0.001

1–6 months

Reference

−1.98 (−2.18, −1.78)

−3.44 (−3.68, −3.20)

−5.24 (−5.53, −4.95)

−8.17 (−8.56, −7.78)

7–12 months

Reference

−1.22 (−1.35, −1.09)

−2.30 (−2.45, −2.15)

−4.44 (−4.63, −4.25)

−5.37 (−5.62, −5.12)

<0.0001

Weight (kg)

P for trend

1–12 months

Reference

−0.29 (−0.34, −0.24)

−0.48 (−0.54, −0.42)

−1.00 (−1.08, −0.92)

−1.23 (−1.33, −1.13)

<0.001

1–6 months

Reference

−0.39 (−0.45, −0.33)

−0.69 (−0.76, −0.62)

−1.05 (−1.14, −0.96)

−1.30 (−1.42, −1.18)

7–12 months

Reference

−0.18 (−0.22, −0.14)

−0.27 (−0.31, −0.23)

−0.96 (−1.01, −0.91)

−1.16 (−1.23, −1.09)

<0.0001

BMD (g/cm ² )

P for trend

1–12 months

Reference

−0.010 (−0.017, −0.003)

−0.040 (−0.049, −0.031)

−0.060 (−0.073, −0.047)

−0.070 (−0.087, −0.053)

<0.001

1–6 months

Reference

−0.020 (−0.027, −0.013)

−0.050 (−0.059, −0.041)

−0.080 (−0.093, −0.067)

−0.090 (−0.11, −0.073)

7–12 months

Reference

0.004 (−0.002, 0.011)

−0.024 (−0.033, −0.015)

−0.034 (−0.046, −0.022)

−0.054 (−0.070, −0.038)

<0.0001