Table 4. The duration of administration in each surgical department.

	Paper-based guidelines (day, mean±(d))	DRUGS (day, mean±(d))
General surgery	2.57±1.45	0.46±0.21**
Stomach intestine surgery	3.01±2.16	0.59±0.23**
Orthopedics	3.27±2.31	0.88±0.41**
Gynaecology and obstetrics	4.87±1.86	2.24±1.02*
Liver and gall surgery	2.73±0.84	0.82±0.45*

t-test (or t'-test),

* P<0.05,

** P<0.01 vs. paper-based guidelines.