Sex risk variable

Marijuana and Alcohol
Class 1
N=249
n (%) of Class

High AOD Risk
Class 2
N=188
n (%) of Class

Polydrug Use
Class 3
N=283
n (%) of Class

Chi-Square (df)

p-value

Past month unprotected sex with main sex partner (N=688)

28.97 (2)

<0.0001

Yes

155 (62.5%)

142 (80.7%)

215 (81.4%)

No

93 (37.5%)

34 (19.3%)

49 (18.6%)

Past month unprotected sex with other partners (N=159)

4.67 (2)

0.1

Yes

9 (25.0%)

16 (25.4%)

25 (41.7%)

No

27 (75.0%)

47 (74.6%)

35 (58.3%)

Unprotected last sex

32.45 (2)

<0.0001

Yes

140 (56.2%)

147 (78.2%)

214 (75.6%)

No

109 (43.8%)

41 (21.8%)

69 (24.4%)

Experience at last sex

5.50 (2)

0.06

Not willing

2 (0.8%)

8 (4.3%)

9 (3.2%)

Willing

247 (99.2%)

180 (95.7%)

274 (96.8%)

AOD-impaired last sex

53.87 (2)

<0.0001

Yes

87 (34.9%)

130 (69.2%)

161 (56.9%)

No

162 (65.1%)

58 (30.9%)

122 (43.1%)

Own AOD use leads to unprotected sex

19.05 (2)

<0.0001

Yes

40 (16.1%)

64 (34.0%)

68 (24.0%)

No

209 (83.9%)

124 (66.0%)

215 (76.0%)

Main sex partner’s AOD use leads to unprotected sex (N=688)

24.59 (2)

<0.0001

Yes

31 (12.5%)

57 (32.4%)

62 (23.5%)

No

217 (87.5%)

119 (67.6%)

202 (76.5%)