Fig 1. Scatter plots of tibial bone SOS in preterm and term infants with a cubic regression line versus age in months.
(A) preterm girls, (B) preterm boys, (C) term girls, (D) term boys. Corrected age is used for preterm infants. Upper and lower individual 95% confidence intervals are shown as dashed lines. ○ = preterm infants; △ = term infants; values on X axis of Fig 1 (A) and (B): zero value = corrected gestational age 40 weeks; negative values -1 = corrected gestational age 36 weeks, negative -2 = corrected gestational age 32 weeks, negative -3 = corrected gestational age 28 weeks.