Abstract: The workloads of 36 shift nurses at ICU and at GW (medical andsurgical wards) were compared by the quantitative analysis of urinary CAusing high performance liquid chromatography. The results indicated thatthe workloads of ICU nurses were heavier than GW nurses during the day(8:00--16:00) and at the second half of the night (2:00--8:00. ) ICU nurseswere mainly loaded mentally while GW nurses physically. There was nosignificant difference in the workloads of the nurses at ICU and GW atthe first half of the night (18:00--2:00). The subjects' self-assessment ofthe workloads, mood changes and sleep were also analysed.

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