Table 3 Odds ratios and 95% confidence intervals for univariate analysis of HIV serostatus.

Respondent variables

Years of injection drug use (quartiles)

0–6

100 (29.9)

2 (7.7)

1.0

7–13

83 (24.9)

11 (42.3)

6.6 (1.4–30.7)

0.016

14–21

71 (21.3)

7 (26.9)

4.9 (0.9–24.4)

0.051

22–39

80 (24.0)

6 (23.1)

3.75 (0.7–19.0)

0.111

Gender

Male

193 (57.8)

13 (50.0)

1.0

Female

141 (42.2)

13 (50.0)

1.4 (0.6–3.0)

0.442

Education level

< grade 12

234 (70.1)

19 (73.1)

1.0

> grade 12

100 (29.9)

7 (26.9)

0.9 (0.4–2.1)

0.744

Ethnicity

Caucasian

125 (37.4)

3 (11.5)

1.0

Aboriginal

209 (62.6)

23 (88.5)

4.6 (1.4–15.6)

0.004

Mobility

In Winnipeg > 1 year

244 (73.1)

18 (69.2)

1.0

Moved to Winnipeg in past year

90 (27.0)

8 (30.8)

1.2 (0.5–2.9)

0.677

Deals drugs

No

175 (52.4)

15 (57.7)

1.0

Yes

159 (47.6)

11 (42.3)

0.8 (0.4–1.8)

0.601

Cocaine use

No

122 (36.5)

6 (23.1)

1.0

Yes

212 (63.5)

20 (76.9)

1.9 (0.7–4.9)

0.154

Talwin/ritalin use

No

228 (68.3)

16 (61.5)

1.0

Yes

106 (31.7)

10 (38.5)

1.3 (0.6–3.1)

0.486

Morphine use

No

209 (62.6)

21 (80.8)

1.0

Yes

125 (37.4)

5 (19.2)

0.4 (0.1–1.1)

0.051

Heroin use

No

299 (89.5)

26 (100)

Yes

35 (10.5)

0 (0.00)

Not defined

Injects daily

No

52 (15.6)

5 (19.2)

1.0

Yes

282 (84.4)

21 (80.8)

0.8 (0.3–2.1)

0.631

Injected at a hotel

No

198 (59.3)

16 (61.5)

1.0

Yes

136 (40.7)

10 (38.5)

0.9 (0.4–2.1)

0.821

injected at a shooting gallery

No

287 (85.9)

17 (65.4)

1.0

Yes

47 (14.1)

9 (34.6)

3.2 (1.4–7.7)

0.012

Ever used someone else's syringe

No

136 (40.7)

2 (7.7)

1.0

Yes

198 (59.3)

24 (92.3)

8.2 (1.9–35.5)

<0.001

Injected someone else as a service

No

256 (76.7)

13 (50.0)

1.0

Yes

78 (23.3)

13 (50.0)

3.3 (1.5–7.4)

0.005

Obtains syringes from friends

No

106 (31.7)

13 (50.0)

1.0

Yes

228 (68.3)

13 (50.0)

0.5 (0.2–1.0)

0.063

Obtains syringes from questionable sources

No

257 (77.0)

19 (73.1)

1.0

Yes

77 (23.1)

7 (26.9)

1.2 (0.5–3.0)

0.658

Opposite-sex regular partners

No

105 (31.4)

8 (30.8)

1.0

Yes

229 (68.6)

18 (69.2)

1.0 (0.4–2.4)

0.944

Opposite-sex casual partners

No

208 (62.3)

18 (69.2)

1.0

Yes

126 (37.7)

8 (30.8)

0.7 (0.3–1.7)

0.474

Opposite-sex client partners

No

290 (86.8)

19 (73.1)

1.0

Yes

44 (37.7)

7 (26.9)

2.4 (1.0–6.1)

0.076

Regular same-sex partners

No

326 (97.6)

24 (92.3)

1.0

Yes

8 (2.4)

2 (7.7)

3.4 (0.7–16.9)

0.183

Casual same-sex partners

No

320 (95.8)

25 (96.2)

1.0

Yes

14 (4.2)

1 (3.9)

0.9 (0.1–7.2)

0.932

Client same-sex partners

No

329 (98.5)

23 (88.5)

1.0

Yes

5 (1.5)

3 (11.5)

8.6 (1.9–38.2)

0.013

Egocentric network variables (maximum number of network members = 20)

Total number of IDU in network

Median (IQR)

3 (2,5)

2 (0,5)

0.9 (0.8–1.1)

0.241

Total number of IDU family members in network

Median (IQR)

0 (0,1)

0 (0,2)

1.2 (0.9–1.6)

0.260

Spouse IDU in network

No

215 (64.4))

17 (65.4)

1.0

Yes

119 (35.6)

9 (34.6)

1.0 (0.4–2.2)

0.917

IDU risk network variables (maximum number of IDU = 5)

Number of IDU respondent sees daily

None

107 (32.0)

12 (46.2)

1.0

1

112 (33.5)

6 (23.1)

0.5 (0.2–1.3)

0.154

2

58 (17.4)

5 (19.2)

0.8 (0.3–2.3)

0.637

3–5

57 (17.1)

3 (11.5)

0.5 (0.1–1.7)

0.256

Number of IDU in network who inject daily

None

191 (57.2)

17 (65.4)

1.0

1

63 (18.9)

2 (7.7)

0.4 (0.1–1.6)

0.176

2

45 (13.5)

4 (15.4)

1.0 (0.3–3.1)

0.998

3–5

35 (10.5)

3 (11.5)

1.0 (0.3–3.5)

0.954

Number of IDU in network who have been IDU for >5 years

0

159 (47.6)

14 (53.9)

1.0

1

65 (19.5)

3 (11.5)

0.5 (0.1–1.9)

0.323

2

52 (15.6)

4 (15.4)

0.9 (0.3–2.8)

0.819

3–5

58 (17.4)

5 (19.2)

1.0 (0.3–2.8)

0.969

Number of IDU in network who have injected at a hotel

0

207 (62.0)

20 (76.9)

1.0

1

64 (19.2)

2 (7.7)

0.3 (0.1–1.4)

0.135

2–5

63 (18.9)

4 (15.4)

0.7 (0.2–2.0)

0.458

Number of IDU in network who have injected at a shooting gallery

0

254 (76.1)

20 (76.9)

1.0

1

43 (12.9)

2 (7.7)

0.6 (0.1–2.6)

0.488

2–5

37 (11.1)

4 (15.4)

1.4 (0.4–4.2)

0.582

Number of IDU in network with whom respondent has pooled money

0

94 (28.1)

12 (46.2)

1.0

1

91 (27.3)

4 (15.4)

0.3 (0.1–1.1)

0.074

2–3

90 (27.0)

6 (23.1)

0.5 (0.2–1.5)

0.213

4–5

59 (17.7)

4 (15.4)

0.5 (0.2–1.7)

0.292

Number of IDU in network who have used a syringe before the respondent used it

0

255 (76.4)

20 (76.9)

1.0

1

56 (16.8)

4 (15.4)

0.9 (0.3–2.8)

0.869

2–5

23 (6.9)

2 (7.7)

1.1 (0.2–5.0)

0.894

Number of IDU in network who have used other drug paraphernalia before respondent has used it.

0

201 (60.2)

17 (65.4)

1.0

1

59 (17.7)

3 (11.5)

0.6 (0.2–2.1)

0.429

2–5

74 (22.2)

6 (23.1)

1.0 (0.4–2.5)

0.932

Number of IDU in network who have initiated respondent to injection drug use

0

242 (72.5)

21 (80.8)

1.0

1

77 (23.1)

5 (19.2)

0.7 (0.3–2.1)

0.563

2–5

15 (4.5)

0 (0.0)

Not defined

Number of IDU in network who have shown respondent how to inject drugs

0

229 (68.6)

19 (73.1)

1.0

1

75 (22.5)

6 (23.1)

1.0 (0.4–2.5)

0.940

2–5

30 (9.0)

1 (3.9)

0.4 (0.1–3.1)

0.382

Number of IDU in network who have injected respondent with drugs

0

161 (48.2)

12 (46.2)

1.0

1

95 (28.4)

5 (19.2)

0.7 (0.2–2.1)

0.525

2–5

78 (23.4)

9 (34.6)

1.5 (0.6–3.8)

0.344

Number of IDU in network who have used talwin/ritalin

0

239 (71.6)

17 (65.4)

1.0

1–3

54 (16.2)

4 (15.4)

1.0 (0.3–3.2)

0.944

4–5

41 (12.3)

5 (19.2)

1.7 (0.6–4.9)

0.315

Number of IDU in network who have used cocaine

0

210 (62.9)

18 (69.2)

1.0

1

55 (16.5)

3 (11.5)

0.6 (0.2–2.2)

0.481

2–3

44 (13.2)

4 (15.4)

1.1 (0.3–3.3)

0.919

4–5

25 (7.5)

1 (3.9)

0.5 (0.1–3.6)

0.467

Number of IDU in network who have used morphine

0

255 (76.4)

21 (80.8)

1.0

1

46 (13.8)

4 (15.4)

1.1 (0.3–3.2)

0.924

2–5

33 (9.9)

1 (3.9)

0.4 (0.0–2.8)

0.336