Table 2.

Risk factors associated with intraoperative bradycardia.

	Univariate (n = 267)					Multivariate (n = 261)
	Yes		No		P value	OR (95%CI)	P value
	Total	Value	Total	Value
Atropine	195	8 (4.1%)	72	21 (29.2%)	0.000	0.125 (0.016-0.983)	0.048
Steroid	183	8 (4.4%)	84	21 (25.0%)	0.000
Muscle relaxant	144	4 (2.8%)	123	25 (20.3%)	0.000
Intubation	193	8 (4.1%)	74	21 (28.4%)	0.000	0.032 (0.003-0.333)	0.004
Post conceptual age (weeks)	39 (37, 43)		48 (41, 55)		0.000
Body weight (kg)	2.0 (2.0, 3.0)		5.0 (3.0, 7.0)		0.000	0.352 (0.174-0.711)	0.004
Hemoglobin concentration (g/L)	100.6 ± 16.6		107.3 ± 17.8		0.053
Duration of surgery (min)	70.7 ± 26.2		64.6 ± 28.2		0.274
Duration of anesthesia (min)	115.0 ± 42.3		114.6 ± 44.2		0.962	1.029 (1.012-1.046)	0.001