Table 3.

Risk factors of VAS

Intercept and variable	Odds ratio	95% CI of OR
Age	1.07	0.94–1.22
Gender
Male	Reference
Female	1.09	0.27–4.31
Weight	1.02	0.95–1.11
Height	0.97	0.88–1.06
Dosage of fentanyl	1.30	0.96–1.76
Operation time	0.76	0.19–3.02
CYP3A4 *1G
*1/*1	Reference
*1/*1G + *1G/*1G	2.09	0.49–8.86
OPRM1 A118G
GG	Reference
GA + AA	14.73	3.21–67.49
COMT Val158Met
GG	Reference
GA + AA	0.87	0.22–3.46
CYP3A5 *3
GG	Reference
GA + AA	0.43	0.08–2.34