Table 10. Association between type of anesthesia and intrathecal administration of bupivacaine, fentanyl and morphine.

Type of Anesthesia		Morphine		Total
		(-)	(+)
	n	37	188
Spinal only	No.	12	186	198
Spinal and epidural	No.	18	0	18
Spinal and general	No.	2	2	4
Spinal, general and epidural	No.	1	0	1
General only	No.	3	0	3
General and epidural	No.	1	0	1

SD, standard deviation.