Table 1.
Summary of 20 insecticide active ingredients and one synergist measured in house-dust from ALL cases (n=252) and controls (n=306) with detection limits and frequencies of detection.
| Insecticide | Chemical class | Detection limit (ng/g dust) | Detected n (%) |
|---|---|---|---|
| trans-Permethrin | Pyrethroid | 2 | 556 (99.6) |
| cis-Permethrin | Pyrethroid | 2 | 549 (98.4) |
| Piperonyl butoxide | Synergist | 4 | 540 (96.8) |
| Chlorpyrifos | Organophosphate | 5 | 498 (89.2) |
| Diazinon | Organophosphate | 2 | 443 (79.4) |
| Carbaryl | Carbamate | 2 | 377 (67.6) |
| Propoxur | Carbamate | 5 | 373 (66.9) |
| Cypermethrin 2 | Pyrethroid | 20 | 269 (48.2) |
| Cypermethrin 3 | Pyrethroid | 20 | 269 (48.2) |
| Cypermethrin 4 | Pyrethroid | 20 | 264 (47.3) |
| Cypermethrin 1 | Pyrethroid | 20 | 258 (46.2) |
| Phosmet | Organophosphate | 25 | 150 (26.9) |
| Cyfluthrin 3 | Pyrethroid | 20 | 142 (25.5) |
| Cyfluthrin 4 | Pyrethroid | 20 | 140 (25.1) |
| Cyfluthrin 2 | Pyrethroid | 20 | 136 (24.4) |
| Cyfluthrin 1 | Pyrethroid | 20 | 115 (20.6) |
| Tetramethrin 2 | Pyrethroid | 2 | 69 (12.4) |
| Deltamethrin | Pyrethroid | 50 | 68 (12.2) |
| Malathion | Organophosphate | 10 | 48 (8.6) |
| Azinphos methyl | Organophosphate | 100 | 42 (7.5) |
| Allethrin 1 | Pyrethroid | 20 | 40 (7.2) |
| Allethrin 2 | Pyrethroid | 20 | 40 (7.2) |
| Tetramethrin 1 | Pyrethroid | 2 | 40 (7.2) |
| Heptachlor | Organochlorine | 10 | 27 (4.8) |
| Methyl parathion | Organophosphate | 20 | 18 (3.2) |
| Dimethoate | Organophosphate | 25 | 14 (2.5) |
| Phorate | Organophosphate | 25 | 12 (2.2) |
| Dicofol | Organochlorine | 50 | 8 (1.4) |
| Acephate | Organophosphate | 100 | 3 (0.5) |
| Methidathion | Organophosphate | 10 | 2 (0.4) |