 |
ex-Member
|
|
Join Date: Sep 2006
Posts: 110
|
|
|
ex-Member
Join Date: Sep 2006
Posts: 110
|
Statistics, statistics and more statistics
Frequency of symptoms in Parkinson's Disease :
http://www.parkinsonhuis.nl/Parkinso...try/images.htm
There are basically four lots of figures. Two of them, modal sores and symptom groups, can be disregarded. The best score to make use of is the average scores.
1. Percentage - The first is the amount of people with PD that get that particular symptom, with "Could your movements be called "slow"? being the most frequent. However, these figures do not take any account of the severity of the problem. So for example, virtually all people with PD could have slow movements, but only a bit slow according to these figures.
2. Average scores - This issue is taken account of with the next set of figures - "Average and modal scores on a 1-5 scale.". These do detail the severity because everybody has not only stated whether or not they get the symptom, but also how badly they get it. It gives two figures - an average, and a modal score. It is the average score that is most useful.
3. Modal sores - A modal sore is simply the middle score. So if the scores were 1 1 2 2 3 3 3 4 4 5 5, 3 would be the modal score because it is the middle score. When there are a lot of people responding as there are in this survey, the modal score is of no real use.
4. Symptom groups - these merely group symptoms together. They are not really well grouped and don't really add anything useful.
The rest are merely the individual scores (in Dutch).
|