Estimated changes in the incidence of allergic contact dermatitis (ACD) since the implementation of EU Directive 2003/53/EC (January 2005)
| Group* | Number of actual reports | Incidence rate ratio (2005–2009:2002–2004) (95% CI) | p Value† |
| 1. ACD attributed to chromate | 238 | 0.48 (0.36 to 0.64) | 0.006 |
| All other ACD | 2206 | 0.76 (0.69 to 0.85) | |
| 2. ACD attributed to chromate in ‘cement workers’ | 95 | 0.37 (0.24 to 0.57) | 0.001 |
| All other ACD | 2348 | 0.75 (0.68 to 0.83) | |
| 3. ACD NOT attributed to chromate in ‘cement workers’ | 82 | 0.70 (0.44 to 1.11) | 0.57 |
| All other ACD | 2362 | 0.73 (0.66 to 0.80) | |
↵* Groups are defined by chromate attributed ACD and occupation. ‘Cement workers’ includes bricklayers and masons, roofers, roof tilers and slaters, carpenters and joiners, construction trades not elsewhere classified, plasterers, floorers and wall tilers, scaffolders, stagers and riggers, road construction operatives, construction operatives not elsewhere classified, labourers building and woodworking trades, labourers other construction trades not elsewhere classified.
↵† Formal test of difference in the incidence rate ratio between ACD in each group and all other ACD.