61 Endogenous testosterone levels are predictive of symptom reduction with exposure therapy in social anxiety disorder interaction, Estimate = -11.08(7.36), F(1,47) = 2.27, p = .13. In specific, reactive testosterone levels were not associated with reductions in symptom levels pre to post assessment for females only. Social anxiety symptom levels males The mixed model analysis for LSAS as dependent variable, with baseline testosterone and Assessment (pre/post) as predictors, showed a main effect of Assessment, again confirming efficacy of exposure, but now with respect to the social anxiety symptom levels, Estimate = -7.25(3.28), F(1,17) = 4.87, p = .04. In specific, LSAS scores reduced from pre to post-assessment (Mpre = 61.09, SD = 17,58; Mpost = 53.59, SD = 19.86). However, an interaction of baseline testosterone and assessment was not found, Estimate = 0.05(14.44), F(1,17) = 0.00, p = .99. For males, reductions in symptom levels were not related to baseline testosterone levels. We also conducted a mixed model analysis with reactive testosterone levels as predictor for males only. Apart from the typical main effect of Assessment (pre, post), Estimate = -7.35(3.27), F(1,17) = 5.03, p = 0.38, testosterone reactivity did not modulate the effect of Assessment as indicated by a non-significant Time x Assessment interaction, Estimate = -.34(45.85), F(1,17) = 0.01, p = .94. In specific, reactive testosterone levels for males were not associated with reductions in symptom levels pre to post assessment. 3
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