Table 4 Selected diagnostic results and medical evaluation of study collective (n = 148)
Characteristics | N | % |
|---|---|---|
Methacholine challenge test (performed* in) | 114 | 77.0 |
Positive | 50 | 33.8 |
Borderline | 7 | 4.7 |
Negative | 46 | 31.1 |
Discontinued early, not appraisable | 11 | 7.4 |
*Not performed due to contradictions like relevant initial obstruction, massive hypertension, pregnancy or patient refusal. | ||
Skin prick test at consultation against AP or own blonde dye (performed in) | 144 | 97.3 |
Not appraisable due to insufficient controls | 9 | 6.1 |
Positive or questionable reaction | 30 | 20.3 |
Previous external skin tests against AP or own blonde dye (performed in) | 9 | 6.1 |
Positive or questionable reaction | 8 | 5.4 |
Skin prick test at consultation against henna (performed in) | 22 | 14.9 |
Positive or questionable reaction | 2 | 1.4 |
Specific inhalation challenge (SIC) (performed in) | 9 | 6.1 |
SIC positive for AP or blonde dye | 3 | 2.0 |
Specific occupational causation for obstructive airway disease confirmed (via clinically relevant hypersensitivity reaction to AP/blonde dye or positive SIC) | 24 | 16.2 |