This indicates that the difference between the instruments is comparable on the same occasion.
The mean difference and p-value were 24.80 μm and 0.0001, respectively: indicating a statistically significant difference between the instruments [ 29] [Table 4].
Conversion of the data into implicit time Z-scores produced an even smaller mean difference between the instruments, making them more comparable (Fig. 5c).
Nonetheless, it is possible that in special situations like e.g. certain diseases as cornea guttata, or poor image quality (which was not included in our study) the observed difference between the instruments might be altered.
That said, there was a great deal of suppleness in her playing, and by the end of the first half of the program she had compensated for the differences between the instrument she knew and the one she played.
Figure 9 shows the distribution of the differences between the instrument responses before and after the earthquake.
Results: More than one half of the cohort intended to have a further pregnancy, with no significant differences between the instrument vaginal delivery and caesarean delivery groups (51% vs 54% before discharge; adjusted odds ratio, 1.04; 95% CI, 0.2, 6.0), and there was little change in maternal views over time.
The major difference between this instrument and that used in the US study is the adjustment of the instrument for cultural appropriateness.
Differences between the instruments may be due to different reporting periods: the EQ-5D asks for the patient's immediate situation ("today"), whereas the reporting periods of the SF-12 and the SGRQ were 4 weeks and 3 months, respectively.
Although the cost analysis produced similar results in the comparison of the two technologies (total cost equal to €4,279.11 and €4,242.66 for reusable instrument kit and the disposable one respectively), a significant difference between the two instrument kits was noted, in particular concerning the organisational impact and the patient safety.
