Table V.
Cross-reactions in patients allergic to PPDA and other chemicals of the para group
| Allergens | Total, N | Female, n | Male, n |
|---|---|---|---|
| PPDA | 100 | 81 | 19 |
| IPPD | 23 | 16 | 7 |
| TDA | 9 | 9 | 0 |
| EDA | 1 | 0 | 1 |
| TETA | 1 | 0 | 1 |
| PPDA + IPPD | 6 | 1 | 5 |
| PPDA + paraben mix | 3 | 1 | 2 |
| PPDA + benzocaine | 11 | 8 | 3 |
| PPDA + benzocaine + epoxy | 1 | 0 | 1 |
| PPDA + paraben mix + benzocaine | 3 | 1 | 2 |
| TDA + epoxy | 1 | 1 | 0 |
| PPDA + IPPD + benzocaine | 1 | 1 | 0 |
| PPDA + IPPD + paraben mix | 1 | 0 | 1 |
| PPDA + IPPD + paraben mix + benzocaine | 1 | 0 | 1 |
| PPDA + IPPD + TETA | 1 | 0 | 1 |
| IPPD + paraben mix | 1 | 0 | 1 |
| IPPD + benzocaine | 1 | 0 | 1 |
n – number of patients with positive patch test results, PPDA – paraphenylenediamine, IPPD – N-isopropyl-N-phenyl-4-phenylenediamine, TDA – toluene-2,5-diamine, TETA – triethylenetetramine, EDA – ethylenediamine.