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Longitudinal findings from the Normative Aging Study: II. Do emotionality and extraversion predict symptom change?

We investigated the relationship between the personality traits of emotionality and extraversion and symptom-reporting, both cross-sectionally and longitudinally. The sample consisted of 1,034 men, initially screened for good health, who completed both the 16PF and at least two CMIs, (M = 5, range = 2-8) over an average period of 17 years (range = 2-25). Using a two-stage growth model, we obtained a predicted baseline and slope for each man for self-reported physical and psychological symptoms. Correlations revealed that emotionality was positively related to the numbers of both physical and psychological symptoms reported at baseline, while extraversion was negatively related. However, regression analyses including age and both personality variables indicated that only emotionality was associated with level of symptom-reporting. Longitudinal analyses revealed that emotionality was unrelated to physical symptom slopes and only weakly related to psychological slopes. We interpret these results as showing that, while personality and symptom-reporting are related cross-sectionally, personality does not predict changes in symptom reporting.