sentence: The increased sensitivity of the digits of women office workers < 30 years may have occurred by chance , but as this finding is biologically plausible it is likely to be a true finding.The overlap in sensory perception thresholds of the heavy manual workers not exposed to HTV and workers with HAVS could be expected as some of the workers with HAVS had an early stage of HAVS with only neurological symptoms and some of the heavy manual workers would have had thick or hard skin or sub-clinically damaged hands .