|
Clinical and epidemiological characteristics of 23 CFS women. |
|
| Characteristic |
Number |
|
|
|
| Type of fatigue onset a |
|
| Gradual |
12 |
| Sudden |
10 |
| Age, years b |
|
| ≤50 |
12 |
| >50 |
11 |
| Duration of illness b |
|
| ≤10 |
15 |
| >10 |
8 |
| No. of CFS symptoms b |
|
| 4 |
8 |
| 5 |
7 |
| ≥6 |
8 |
| Body mass index c |
|
| Normal |
6 |
| Overweight |
7 |
| Obese |
10 |
| Illness group d |
|
| 1 |
4 |
| 2 |
19 |
|
a Onset type defined as sudden (self-reported as developing fatigue in = 1 week) or gradual (developing fatigue over a period = 1 month). One subject described onset as between 1 week and one month and was not classified for this stratification. b Further stratification and analysis using the Kruskal-Wallis nonparametric test did not show different results. c Analysis performed on BMI <25 (normal) compared with >30(obese). Subjects considered overweight were not included in this particular analysis. Further stratification and analysis using the Kruskal-Wallis test showed no significant differences between the groups (results not shown.). d Illness group defined by factor analysis of symptoms followed by cluster analysis [4]. | |
Whistler et al. Journal of Translational Medicine 2003 1:10 doi:10.1186/1479-5876-1-10 |
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