. Author manuscript; available in PMC: 2015 Nov 1.

Published in final edited form as: Anesth Analg. 2014 Nov;119(5):1201–1207. doi: 10.1213/ANE.0000000000000382

Table 8. Simultaneous analysis of Ser9Gly & Val158Met in a negative binomial regression model.

Genotypes		Incidence Rate Ratio of Utilization
Genotypes		Estimates (Std Err)	IRR (95% CI)	p-value
DRD3 Ser9Gly (ref=Gly/Gly)	Gly/Ser	0.03 (0.19)	1.03 (0.71, 1.48)	0.879
DRD3 Ser9Gly (ref=Gly/Gly)	Ser/Ser	-0.02 (0.35)	0.98 (0.50, 1.93)	0.959
COMT Val158Met (ref=Val/Val)	Val/Met	-0.08 (0.19)	0.92 (0.64, 1.33)	0.661
COMT Val158Met (ref=Val/Val)	Met/Met	0.79 (0.30)	2.20 (1.21, 3.99)	0.010
Alleles
DRD3 Ser9Gly (ref=Gly)	Ser	0.00 (0.14)	1.00 (0.76, 1.32)	0.991
COMT Val158Met (ref=Val)	Met	0.28 (0.14)	1.33 (1.01, 1.75)	0.043

Standard Error (Std Err). Reference (ref). Incident rate ratio (IRR). Confidence interval (CI).