“In this population-based study, all atopic diseases, not only atopic dermatitis, were found as individual risk factors for HE. In addition, female gender, obesity and mold exposure increased the risk of HE,” wrote Marjut Koskelo, MD, and her colleagues at the University of Oulu in Finland. Their report was published in Contact Dermatitis.
“Parental allergy was also a risk factor of offspring’s HE. Moderate or high physical activity as well as owning a dog appeared as protective factors of HE. No association was found between other lifestyle factors and HE,” they added.
Hand eczema is one of the most common skin disorders and is the most common occupational skin disease, the authors wrote. Many risk factors, including atopic dermatitis, are known to be linked with HE, but whether various other factors might also be linked has not been well studied.
The research team investigated the link between HE and atopic diseases, parental factors, environmental factors (exposure to mold, keeping animals), and lifestyle factors (physical activity, obesity, tobacco and alcohol use).
They analyzed data of people who took part in the Northern Finland Birth Cohort 1966 Study. The data, collected since 1965, includes details about 12,055 mothers in northern Finland who were expected to deliver babies in 1966, and their 12,058 live-born children. The children have been followed over the years with questionnaires and clinical examinations, and their parents have been followed by national registers and medical reports.
For the 46-year follow-up, 6,830 respondents aged 45-46 years, roughly half of them women, completed a 132-question form covering physical health, lifestyle, environmental factors, socioeconomic status, and history of hand eczema and other atopic diseases.
In the statistical analysis, the researchers adjusted for atopic dermatitis, asthma, allergic rhinoconjunctivitis, education level, body mass index, maternal BMI, parental allergy, physical activity, living on a farm, and mold exposure and symptoms.
Of the 900 respondents who reported having had HE, 592 (65.8%) were women and 308 (34.2%) were men (odds ratio [OR], 1.73; 95% confidence interval [CI], 1.49-2.0).
Various factors linked with hand eczema risk
The authors found the following:
- Atopic diseases and HE were linked: atopic dermatitis (adjusted odds ratio [aOR], 9.66; 95% CI, 8.03-11.66), asthma (aOR, 1.38; 95% CI, 1.12-1.71), and allergic rhinoconjunctivitis (aOR, 1.28; 95% CI, 1.04-1.56). Sex did not affect the link between atopic diseases and HE.
- Respondents who reported visible mold or mold odor in their apartments had higher risk for HE than did those without a history of mold exposure (OR, 1.32; 95% CI, 1.07-1.61).
- Obesity was linked with HE (OR, 3.44; 95% CI, 1.05-22.8), but smoking status, alcohol intake, and education level were not statistically significant risk factors for HE.
- Participants who reported moderate or high physical activity had lower risk for HE (OR, 0.78; 95% CI, 0.64-0.94; and OR, 0.56; 95% CI, 0.33-0.91, respectively) than those who were less active.
- Parental allergy increased risk for HE (OR, 1.98; 95% CI, 1.70-2.30); as maternal age, BMI, and menarche age increased, so did the risk for the child’s HE, but the increases were not statistically significant; and no significant links were found between maternal tobacco smoking, parental asthma, birth weight, parity, gestational age, and HE.
- Dog owners had less risk for HE than did people without a dog (OR, 0.83; 95% CI, 0.71-0.97); links between cat or farm animal owners and HE were not significant.