The table shows the population distribution derived from patient data and current medians. To be an effective correction factor, the median & mean values should be close to 1 (or 0 in log column) and in fact they do conform quite well, having an error of 0.6 - 2.5% but use of a week + day gestation dating with exponential regression to determine medians should improve matters [Burton figures show errors of 0.009 - 0.06%]. It is not possible to calculate the effect of day + week derived exponentially ...
