. Author manuscript; available in PMC: 2016 May 1.

Published in final edited form as: Eur J Gastroenterol Hepatol. 2015 May;27(5):550–556. doi: 10.1097/MEG.0000000000000321

Table 2.

Multinomial Logistic Regression Models of HCV Monoinfection, HIV/HCV Coinfection among 1434 PWID in Vietnam, 2005-2007

	Adjusted Odds Ratio (95% Confidence Interval)
	Model 1		Model 2		Model 3		Model 4		Model 5		Model 6		Model 7		Model 8
	HCV Mono^a	HIV/HCV Co^b	HCV Mono^a	HIV/HCV Co^b	HCV Mono^a	HIV/HCV Co^b	HCV Mono^a	HIV/HCV Co^b	HCV Mono^a	HIV/HCV Co^b	HCV Mono^a	HIV/HCV Co^b	HCV Mono^a	HIV/HCV Co^b	HCV Mono^a	HIV/HCV Co^b
Age	1.04 (1.01-1.08)	0.99 (0.96-1.03)	1.02 (0.99-1.06)	0.98 (0.94-1.02)	1.04 (1.01-1.07)	0.99 (0.96-1.03)	1.04 (1.01-1.08)	1.00 (0.96-1.03)	1.04 (1.01-1.08)	1.00 (0.96-1.03)	1.04 (1.01-1.08)	1.00 (0.96-1.04)	1.03 (1.00-1.07)	0.99 (0.95-1.02)	1.03 (1.00-1.07)	0.99 (0.95-1.02)
In a stable relationship	0.46 (0.30-0.72)	0.36 (0.23-0.57)	0.47 (0.31-0.74)	0.37 (0.23-0.59)	0.48 (0.31-0.74)	0.38 (0.24-0.60)	0.44 (0.28-0.69)	0.34 (0.21-0.55)	0.45 (0.29-0.70)	0.34 (0.22-0.55)	0.45 (0.29-0.69)	0.35 (0.22-0.55)	0.46 (0.29-0.71)	0.35 (0.22-0.57)	0.46 (0.29-0.71)	0.36 (0.22-0.57)
Ever had a tattoo	1.72 (1.15-2.58)	2.46 (1.61-3.75)	1.65 (1.10-2.49)	2.37 (1.54-3.64)	1.70 (1.14-2.55)	2.44 (1.59-3.73)	1.60 (1.06-2.40)	2.29 (1.49-3.52)	1.61 (1.07-2.42)	2.30 (1.50-3.53)	1.61 (1.07-2.43)	2.28 (1.49-3.51)	1.58 (1.04-2.38)	2.24 (1.45-3.45)	1.58 (1.04-2.38)	2.22 (1.44-3.43)
Injecting >= 2 years	3.62 (1.99-6.58)	14.30 (5.78-35.39)	3.05 (1.64-5.66)	12.32 (4.90-30.97)	3.56 (1.95-6.48)	14.30 (5.77-35.45)	3.44 (1.88-6.31)	14.01 (5.64-34.82)	3.35 (1.83-6.15)	13.36 (5.37-33.24)	3.40 (1.85-6.24)	13.14 (5.28-32.71)	2.90 (1.55-5.41)	11.34 (4.49-28.63)	2.96 (1.58-5.34)	11.41 (4.52-28.78)
Sexual partners in lifetime (reference: <=1)
2-5	0.96 (0.53-1.74)	0.76 (0.41-1.41)	0.81 (0.44-1.49)	0.65 (0.35-1.22)	0.98 (0.54-1.77)	0.79 (0.43-1.47)	0.92 (0.51-1.67)	0.74 (0.40-1.38)	0.93 (0.51-1.68)	0.74 (0.40-1.39)	0.93 (0.51-1.70)	0.73 (0.39-1.36)	0.80 (0.43-1.47)	0.63 (0.34-1.20)	0.80 (0.44-1.48)	0.63 (0.33-1.19)
>=5	0.62 (0.34-1.12)	0.41 (0.22-0.78)	0.53 (0.29-0.97)	0.38 (0.20-0.72)	0.61 (0.34-1.11)	0.43 (0.23-0.80)	0.55 (0.30-1.00)	0.40 (0.21-0.75)	0.56 (0.30-1.02)	0.39 (0.21-0.74)	0.57 (0.31-1.05)	0.38 (0.20-0.71)	0.49 (0.26-0.90)	0.34 (0.18-0.65)	0.51 (0.28-0.96)	0.34 (0.18-0.65)
Unknown	0.43 (0.18-1.03)	0.20 (0.08-0.52)	0.46 (0.19-1.41)	0.22 (0.08-0.59)	0.44 (0.18-1.04)	0.22 (0.08-0.56)	0.39 (0.16-0.94)	0.19 (0.07-0.49)	0.40 (0.17-0.95)	0.19 (0.07-0.49)	0.40 (0.17-0.96)	0.19 (0.07-0.49)	0.44 (0.18-1.08)	0.21 (0.08-0.56)	0.45 (0.18-1.11)	0.21 (0.08-0.56)
Lifetime Injection Behaviors
Ever shared a needle^c	1.03 (0.65-1.61)	1.59 (1.00-2.52)	…	…	…	…	…	…	…	…	0.84 (0.53-1.34)	1.26 (0.78-2.03)	…	…	0.65 (0.40-1.05)	0.96 (0.58-1.58)
Ever reused a syringe and a needle	…	…	3.23 (2.10-4.98)	3.94 (2.45-6.34)	…	…	…	…	…	…	…	…	2.84 (1.83-4.41)	3.31 (2.04-5.38)	3.13 (1.99-4.94)	3.34 (2.02-5.51)
Ever shared diazepam^d	…	…	…	…	2.20 (0.92-5.23)	3.83 (1.60-9.19)	…	…	…	…	…	…	…	…	…	…
Ever shared novocaine^e	…	…	…	…	…	…	2.40 (1.57-3.69)	2.69 (1.72-4.19)	…	…	…	…	…	…	…	…
Ever shared diazepam or novocaine	…	…	…	…	…	…	…	…	2.32 (1.52-3.52)	2.90 (1.88-5.50)	2.40 (1.56-3.67)	2.78 (1.78-4.34)	1.99 (1.30-3.05)	2.46 (1.57-3.84)	2.14 (1.38-3.32)	2.47 (1.57-3.90)

HCV monoinfection;

HIV/HCV coinfection;

ever shared a needle refers to “ever used a needle that others had used”;

ever shared diazepam means “ever drawn Xen/Seduxen (diazepam) from the same ampoule with other people”;

ever shared novocaine means “ever drawn novocaine from the same ampoule with other people.