Age, ethnicity, and education level according to sex are displayed in Table 1. The education level of the present sample is comparable with the education level of the NEO-FFI norm group. Table 2 contains NEO-FFI mean raw domain scores, T-scores, and percentiles comparing the offspring with a sex-matched referent cohort aged 21 to 96. Within the offspring of centenarian group, men and women did not differ significantly in their mean raw scores for the five factors, except for agreeableness, which was higher for the women (Student t-test = 4.5, P < .001). According to T-scores, male offspring of centenarians were low in neuroticism; high in extraversion; and average in openness, agreeableness, and conscientiousness. Percentile scores showed that men scored in the bottom third percentile for neuroticism and the top third percentile for extraversion. Female offspring, per T-scores, were also low in neuroticism and high in extraversion but also high in agreeableness. Otherwise, they were average in openness and conscientiousness. Women scored in the bottom third percentile for neuroticism and the top third percentiles for extraversion and agreeableness.
