Table 1

Error rate according to the activity ratio

	Activity	%	Errors	%	Ratio^a
^aThe ratio is percent of all errors divided by percent of all activities.
Nervous system	202	2.9	22	5.1	1.76
Breathing	1783	25.9	98	22.8	0.88
Cardiovascular	1291	18.7	23	5.5	0.29
Digestive	1002	14.6	10	2.3	0.16
Urine	700	10.2	10	2.3	0.22
Input	1644	24.1	246	57.3	2.38
Output	244	3.6	20	4.7	1.31
Total	6892	100	429	100	–