In the absence of blur, there were no statistically significant differences between the charts (figure 2B; no main effect of chart type, p>0.05).
The most dramatic visual and numerical difference between the new charts and the 2003 chart was the higher shift of the boys' weight curves after 40 weeks compared to the 2003 chart, reaching a maximum difference at 50 weeks of 650, 580, and 740 grams at the 3rd, 50th, and 97th percentiles, respectively.
In any case, the company says, the difference between the two charts is not significant.
Some users have also noticed differences between the default chart and customized charts that seem to be larger than expected.
Some of the differences between the current charts and the 2003 version are likely due to the separation into girl and boy charts, since the shifts of the girls' curves tend to be downward and the boys' curves upward.
The information available is not sufficient to address the reasons for the difference between the two growth charts.
14 20 21 The limitation of this study is that the information available is not sufficient to address the reasons for the difference between the two growth charts, although it is not the main objective of the study.
It is immediately obvious that there are some quite significant differences between the two charts, for example, when a = 1, x0 = 2, and a = 1.5, x0 = 2.
For each of the different prescription tasks, we wanted to test whether there was a significant difference between the IDEAS and ICHNT charts for a range of different outcome measures (eg, completion of information on indication or duration of anti-infectives, ability to identify the prescriber).
Once again, the differences between the old chart – based on physical sales – and the new one are stark.
