Hospital staff nurses work in these, & a recent study shows that nearly half of them exceed 12 hours
In this study we investigated the relationship between hospital 
nurses' shift .... of 1213 hours, although the impact of shift length was smaller for 
them than for... [DOC] [TLE] Work Hour Regulation in Safety-Sensitive Industries - Keeping - NCBI [PAR] Although one study notes that nurses working a permanent night shift or ... 
Workers are more likely to report greater fatigue at the end of 12-hour work .... For 
example, nurses at the University of Pennsylvania Hospitals are paid time and a 
half ....