In multicentric clinical trial involving twelve investigators and 271 patients, betamethasone dipropionate (0.1 percent) aerosol was found to be significantly more effective than its vehicle in the treatment of moderate to severe contact dermatitis. Statistical tests determined this significance at a value of less than 0.0001. Betamethasone dipropionate was favored numerically not only in the combined results but also in ten of the twelve individual centers.
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