Results indicated participants ' perceptions of their own body weight ( but not objective BMI ) moderated the effect of weight stigma on cortisol reactivity : F ( 1,102 ) = 13.48 , P < 0.001 , ( 2 ) p = 0.12 ( interaction 95 % CI range [ -2.06 to -1.44 , -1.31 to -0.99 ] ) .