| Summary: | 碩士 === 中國醫藥學院 === 環境醫學研究所 === 85 === The cross-sectional study investigates the occupational and
personal risk factor related to the prevalence of Carpal Tunnel
Sydrome(CTS)in postal workers. A comparsion was done between a
case study group consisting of 75 people with symptoms of CTS
and a non case study group of 264 people without signs of CTS.
Results showed a significant relationship between the repetitive
motions associated with postal workers daily work routine and
CTS. Also evidence was the use of hand tools(such as a stamp,
chop,etc.)over an exttended period of time led to incidences of
CTS. Although not statistically significant, mail sorters were
1.57 times more likely to acquire CTS compared to administrative
workers. A case group of 31 and a control group of 94without CTS
was selected and ratio of wrist volume was measured and finger
vibration threshold was determined by vibrameter. Results showed
mail soerters had a higher finger vibration threshold than
administrative workers and the former also had a greater number
of people withmedian nerve damage across the wrist. Also
analyzed was the relationship between finger vibration threshold
and the ratio of wrist volume. Results showed ration of wrist
volume increased one unit would lead to 0.57g increase of finger
vibration threashold on left hand and an increase of 0.38g on
the right hand. Also found, but not statistically significant,
was the higher the ratio of wrist volume, the greater the finger
vibration threahold. Postal workers with CTS symptoms were found
to have a greaterratio of wrist volume than the control group.
Of special note, a personal risk factor for developing CTS was
having square-shaped wrists.
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