Results presented above excluded the 67 participants who reported some awareness of the nature of the study. Additional analyses including these 67 aware physicians demonstrated a two-way interaction between awareness and IAT score on thrombolysis recommendation (P = .001) (Fig. 4). As unaware physicians’ bias on the composite IAT variable increased, their likelihood of recommending thrombolysis to black patients decreased, as described above. In contrast, increase in bias among aware physicians was associated with more thrombolysis for black patients. All P values remained significant after adjusting for covariates and the same general pattern held for all three IATs.
