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Occupational contact dermatitis (OCD) regularly causes high levelsofworkermorbidity;however,thisisoftennotreflectedin available statistics. This study aimed to collect and verify OCD reports/referrals and generate disease estimates for a defined geographical area in Melbourne, Australia. Two methods of data collection were used. In the first method, 30 general practitioners (GPs), 2 dermatologists and 1 dermatology outpatient clinicwithinadefinedareareportedeachworkerwithsuspected OCD seen as part of routine practice. With the second method, workers living in the area who were referred to a tertiary referral OCD clinic were included in the study. An occupational dermatologist used a gold standard process that included diagnostic patch testing to verify suspected cases. The incidence rate for confirmed cases was 20.5 per 100 000 workers 95%confidence interval (CI):13-32.1 . The 1-year-period prevalence rate was 34.5 per 100000 (95%CI:24.4-48.7). The positive predictive value (PPV) was highest for the occupational dermatology clinic referrals 63%(95%CI:49-76%) compared with reports from the dermatologists/dermatology outpatient clinic 55%(95%CI:36-74%) and from GPs 43%(95%CI:29-59%) . This study utilizes reports from GPs and dermatologists to provide OCD disease estimates and validation data for an OCD disease register.
Occupational contact dermatitis (OCD) regularly causes high levels of workermorbidity; however, this study aimed at collect and verify OCD reports / referrals and generate disease estimates for a defined geographical area in Melbourne, Australia. Two methods of data collection were used. In the first method, 30 general practitioners (GPs), 2 dermatologists and 1 dermatology outpatient clinicwithinadefinedareareportedeachworkerwithsuspected OCD seen as part of routine practice. With the second method, workers living in the area who were referred to a tertiary referral OCD clinic were included in the study. An occupational dermatologist used a gold standard process that included diagnostic patch testing to verify the cases. The incidence rate for patients was 20.5 per 100 000 workers 95% confidence interval (CI): 13-32.1. The 1-year-period prevalence rate was 34.5 per 100000 (95% CI: 24.4-48.7). The positive predictive value (PPV) was h ighest for the occupational dermatology clinic referrals 63% (95% CI: 49-76%) compared with reports from the dermatologists / dermatology outpatient clinic 55% (95% CI: 36-74%) and from GPs 43% (95% CI : 29-59%). This study reports reports from GPs and dermatologists to provide OCD disease estimates and validation data for an OCD disease register.