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Table 2: Multivariate linear regression coefficients for main, interaction, and stratified effects of executive functioning and COMT in seven sexual risk behavior models.

Standardized Bet Main Effect Interaction Straitfie EF measure EF COMT EF COMT Val/Val Val/Met Met/Met  Sexual Risk Behavior Model ( 192) ( 192) (n  192) (n  54) (n  103) (n  35) Domain Deficit Score  (1) Partners (# past 12 mo) 0.21** 0.10 0.50** 0.03 0.20** 0.52***  (2) Condom use ( past 12 mo) 0.03 0.13 0.24 — — —  (3) Insertive anal ( past 12 mo) 0.06 0.07 0.50** 0.18 0.11 0.18  (4) Receptive anal ( past 12 mo) 0.05 0.05 0.44* 0.17 0.11 0.13  (5) Oral sex ( past 12 mo) 0.10 0.07 0.40 — — —  (6) Intoxicated sex ( past 12 mo) 0.07 0.06 0.08 — — —  (7) Vaginal sex ( past 12 mo) 0.03 0.04 0.28 — — — Wisconsin Card Sort Test (T-score)  (1) Partners (# past 12 mo) 0.09 0.08 0.18 — — —  (2) Condom use ( past 12 mo) 0.10 0.12 0.25 — — —  (3) Insertive anal ( past 12 mo) 0.01 0.07 0.31 — — —  (4) Receptive anal ( past 12 mo) 0.02 0.04 0.38 — — —  (5) Oral sex ( past 12 mo) 0.20** 0.09 0.13 — — —  (6) Intoxicated sex ( past 12 mo) 0.04 0.07 0.32 — — —  (7) Vaginal sex ( past 12 mo) 0.04 0.04 0.04 — — — Trails B (T-score)  (1) Partners (# past 12 mo) 0.01 0.08 0.54 — — —  (2) Condom use ( past 12 mo) 0.07 0.11 0.03 — — —  (3) Insertive anal ( past 12 mo) 0.06 0.06 0.99** 0.18 0.03 –0.38**  (4) Receptive anal ( past 12 mo) 0.04 0.03 0.75* 0.17 0.06 0.22  (5) Oral sex ( past 12 mo) 0.10 0.06 0.68* 0.35** 0.01 0.01  (6) Intoxicated sex ( past 12 mo) 0.11 0.07 0.13 — — —  (7) Vaginal sex ( past 12 mo) 0.07 0.04 0.37 — — — Halstead Category Test (T-score)  (1) Partners (# past 12 mo) 0.11 0.08 0.16 — — —  (2) Condom use ( past 12 mo) 0.16** 0.11 1.13** 0.08 –0.19* –0.49***  (3) Insertive anal ( past 12 mo) 0.01 0.05 0.22 — — —  (4) Receptive anal ( past 12 mo) 0.01 0.03 0.59 — — —  (5) Oral sex ( past 12 mo) 0.06 0.06 0.50 — — —  (6) Intoxicated sex ( past 12 mo) 0.04 0.06 0.44 — — —  (7) Vaginal sex ( past 12 mo) 0.05 0.04 0.25 — — —

ll regression models adjusted for METH status, HIV status, age at first intercourse. tratified analysis of EF effects by genotype was conducted if a significant () interaction was observed. EF: executive functioning; COMT: catechol-O-methyltransferease (0 Val/Val; 1 Val/Met; 2 Met/Met) * ; **, ***.