During WWII, when women worked in the factories, they were on par, for errors and injuries, with the men when the workday was 8 hours/day. However, when those days were increased to 12 hours/day, the women’s rates increased many times over, whereas the men were not affected.
This makes sense. I am way less cranky than my husband when I wake up (but I do need quiet in my early morning work hours). However, I don’t like working more than about a 10 hour work day, and I get cranky at the end of a really long day (i.e. bedtime).