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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Sex Transm Dis. 2015 Mar;42(3):123–128. doi: 10.1097/OLQ.0000000000000249

Table 3.

Factors significantly associated with attitude toward use of an HT among 631 HIV-negative partnered gay men in 275 HIV-negative and 58 HIV-discordant male couples: Results from bivariate and final multivariate random-effects multilevel regression models

Bivariate
models
Final
multivariate
model

Couple-level demographic β(SE) β(SE)
Relationship length
   5 years and less (ref) 0.21 (0.12) 0.11 (0.12)
   Greater than 5 years
Age difference between partners 0.01 (0.01) 0.01 (0.01)
HIV status of relationship
   Discordant (ref) 0.16 (0.08)* 0.12 (0.08)
   Negative concordant
Race
   Mixed or nonwhite (ref) 0.32 (0.11)** 0.27 (0.11)*
   White
Education level
   Both men had Bachelor’s or higher degree (ref) −0.31 (0.11)** −0.26 (0.11)*
   One or neither partner had a Bachelor’s degree
Has primary care provider
   One or both men reported yes (ref) −0.27 (0.11)* −0.25 (0.11)*
   Both partners reported no

Couple-level sexual behavior β(SE) β(SE)

Sex outside of relationship
   One or both men reported yes (ref) 0.40 (0.11)*** 0.49 (0.11)***
   Both partners reported no
UAS within and outside of relationship
  One or both men reported yes (ref) 0.36 (0.14)* --
  Both partners reported no

Couple-level substance use with sex – main partner β(SE) β(SE)
Party drugs a
   One or both men reported yes (ref) 0.40 (0.18)* --
   Both partners reported no
Marijuana
   One or both men reported yes (ref) 0.26 (0.12)* --
   Both partners reported no

Couple-level relationship characteristic β(SE) β(SE)

Investment model for relationship commitment
   Investment size – between couples b −0.25 (0.07)*** −0.24 (0.07)***

Notes.

Results from final random-effects multilevel regression model controlled for couples’ relationship duration, HIV serostatus, and age difference between partners. 597 obs., 315 dyads, χ2 (8) = 56.43, P < 0.001, Log likelihood = −916.76

a

Party drugs include ecstasy, ketamine, GHB, cocaine, and methamphetamine.

b

Investment size refers to the existence of concrete or tangible resources in the relationship that would be lost or greatly reduced if the relationship ends.

*

P < 0.05,

**

P < 0.01,

***

P < 0.001