Neurological symptoms according to the questionnaire | |||||
---|---|---|---|---|---|
Neurological symptoms at the clinical examination | Yes | No | Total | 95% CI | |
The assessment after clinical examination, including a careful history, was used as the gold standard. | |||||
A clinical examination was performed in 187 subjects (of 198) who responded with “yes” to the question on numbness, in 103 subjects (of 110) who answered “no”, but who reported white fingers (23/103 were found to suffer from numbness at clinical examination), and in a random sample (n=29) of those 498 subjects who denied white fingers as well as numbness (three reported numbness at clinical examination). The figure 75 in the table is derived from 23 + (3/29 × 498) and the figure 526 is derived from the calculation (103 − 23) + 26/29 × 498. The total number in the table is 788 instead of 806 owing to the 18 non-attendants. | |||||
Yes | 158 | 75 | 233 | Sensitivity 68% | 54 to 92 |
No | 29 | 526 | 555 | Specificity 95% | 92 to 97 |
Total | 187 | 601 | 788 |