Life expectancy of watch standers

May 3, 2005
2,194
170
133
Those "4 on and 4 off" watch standing duties look like killers !
Are there any opinions or statistics of if or how they affected life expectancy while working or later during retirement ?
 
May 3, 2005
2,194
170
133
Pardon for continuing, but haven't received any replies and wondering if anyone had noticed this and had any opinions , comments or information about the question?