Although it is not possible to calculate z scores at ages where LMS values do not exist, many users need to be able to plot the numbers on the chart anyway, even if there are no lines. This is particuarly true if:
neonates below threshold of viability (22 weeks and above)
Although it is not possible to calculate z scores at ages where LMS values do not exist, many users need to be able to plot the numbers on the chart anyway, even if there are no lines. This is particuarly true if: