Limb salvage and survival were plotted using the Kaplan-Meier method, and, if necessary, the differences between the two groups were assessed by a log-rank test.
If necessary, the differences between the control group and the intervention group will be adjusted with a Cox regression analysis for confounders such as diagnosis and for the prognostic parameters.
It represents as given, natural, and necessary the group differences that are caused by dominant group desires.
Further and more detailed research is necessary into the differences between therapeutic main groups and subgroups with regard to the percentages of available drugs prescribed.
However, are large sample sizes necessary because the differences in efficacy of the treatments being compared are small, or are the differences small because the samples are too large and heterogeneous?
Unlike in the examples above, with a force that's in a different direction than the object's motion, it's necessary to find the difference between these two directions in the form of the angle between them.
"The aid is spread so thin that at the end of the day the necessary difference is not made".
To measure the longitude of some mountain or port or gold mine in the New World, it was necessary to measure the difference between the time some star crossed the meridian there and the time it did back in Paris.
In addition, the concrete building will shrink slightly over time, Mr. Grossman said, making it necessary to estimate the difference between the existing building and the new one, in order to make the floor area level.
"We must give the community access," he says, stressing also that it is necessary to rethink the difference between what appears in the paper and what is published online.
