At the domain level, Agreeableness was associated with the rate of change of BMI across the adult lifespan: Individuals high in antagonism (low Agreeableness; see Figure 2) increased more in BMI over time. In particular, the BMI of participants who were cynical (low A1: Trust), aggressive (low A4: Compliance), and arrogant (low A5: Modesty) increased more in adiposity. In addition, the emotional aspects of impulsivity (N5: Impulsiveness and E5: Excitement-Seeking) were also associated with greater increases in adiposity. For example, on average, at age 30, those who score one standard deviation above the mean on impulsivity had a BMI that was approximately 2.30 points higher than those who scored one standard deviation below the mean on this trait. By age 90, this gap increased to a 5.22 BMI point difference (see Figure 3).
