Men with average working hours longer than @ h/week were found to have significantly increased risks for total CHD ( OR = @ ) as compared to those with weekly working hours in @-@ h , and those with daily hours of sleep fewer than @ h were found to have increased risks for CHD ( OR = @ ) as compared to those with sleeping hours in @-@ h. Restriction to confirmed AMI yielded a greater risk and these associations remained consistent with adjustment of smoking status , body mass index and psychosocial work factors including job demands , job control , workplace justice , job insecurity and shift work .