“…Concerning the job demands, the following items were chosen: handling objects, awkward posture, using hammer, machine tools, screwdriver, pneumatic tools, other vibrating hand tools, standing about and walking, working in adverse climate (bad weather), working on a production line, vibrating platform, tasks at height, pace of working, mental workload, and exposure to noise, heat, cold, artificial light, or heat radiation. The question for job demands was "Please indicate the high job demands for your work" (response: yes/no) [4][5][6][7] . With regard to perceived income, subjects were asked whether they considered themselves: comfortable or well off, earning just enough, coping but with difficulties, or getting into debt.…”