Table 3.

Types of anaesthesia as risk factors for early maternal and perinatal mortality after caesarean section, unadjusted and adjusted for possible confounding factors^*

	Maternal death			Perinatal death
	Odds ratio (95% CI)	Adjusted odds ratio (95% CI)	P value	Odds ratio (95% CI)	Adjusted odds ratio (95% CI)	P value
General v spinal anaesthesia:
All patients	13.1 (4.7 to 35)	6.6 (2.3 to 18.7)	<0.001	3.9 (3.2 to 4.7)	1.8 (1.5 to 2.3)	<0.001
Restricted†	5.4 (1.9 to 15.4)	4.4 (1.5 to 12.8)	0.006	2.1 (1.7 to 2.6)	1.7 (1.4 to 2.1)	<0.001
Inhalation general v spinal anaesthesia, restricted‡	5.1 (1.8 to 14.8)	4.2 (1.5 to 12.4)	0.008	2.0 (1.7 to 2.5)	1.7 (1.4 to 2.1)	<0.001
Halothane (n=3124) v ether (n=1629)	1.2 (0.7 to 2.1)	0.75 (0.4 to 1.4)	0.4	1.3 (1.1 to 1.5)	0.93 (0.7 to 1.2)	0.5
Ketamine v other methods of anaesthesia	11.9 (6.8 to 20.9)	2.9 (1.5 to 5.2)	<0.001	13.6 (9.6 to 19.0)	6.2 (4.1 to 9.3)	<0.001

^*Rural setting, previous caesarean section, haemorrhage, other preoperative medical complication, level of training of surgeon and anaesthetist.

^†Restricted to the 7460 without preoperative haemorrhage.

^‡Restricted to the 7408 without preoperative haemorrhage not given ketamine.