But, because of statistical sampling variations, the difference between the numbers was minimal, the group said.
There was no significant difference between the numbers unable to work at 28 and 40 months after the tragedy.
More important, the difference between the numbers of side effects was not statistically significant, meaning that it could have occurred by chance and that the drugs could be similar or even the same.
The overall populations of all of them except Kensington and Chelsea (K&C) have been rising, primarily due to "natural increase" - the difference between the numbers of births and deaths.
Put simply, natural increase is the difference between the numbers of births and deaths in a population; the rate of natural increase is the difference between the birthrate and the death rate.
Overall, there was no difference between the numbers of pin site infections seen in the studies.
The bigger the shift from one side to the other, the bigger the difference between the numbers.
Although Strategy's numbers paint the Samsung vs. Apple battle as a tight race between mobile giants, there's a big difference between the numbers being reported here.
The Conservatives pledged in their 2010 manifesto to substantially reduce annual net migration - the difference between the numbers entering and leaving the UK - by 2015.
Net migration is the difference between the numbers of people moving to live in the UK and the numbers of people leaving.
The figures measure the difference between the numbers of people moving the UK for a year or more and those leaving the UK for a year or more.
