Being an optimist or a pessimist and its relationship with morning cortisol release and past life review in healthy older people.

Objective: Investigate the relationship between optimism and pessimism and the cortisol awakening response (CAR) and past life review in healthy older people.

Design: 76 older volunteers summarised their lives, highlighting the most important events, impressions and experiences. Cortisol saliva samples were collected on two consecutive weekdays. High and low optimism and pessimism groups were computed by mean split.

Main Outcome Measures: Percentages of positive (PE) and negative events (NE) and positive (PCE) and negative cognitions and emotions (NCE) were obtained. Optimism and pessimism were measured with the Life Orientation Test Revised. The areas under the curve with respect to the ground and with respect to the increase were computed, with the latter understood as the CAR.

Results: The high pessimism group reported more NE and NCE and less PE and PCE (p's < 0.041). No significant differences in CAR were found between high and low optimism and pessimism groups after removing suspected non-adherent participants (p's > 0.116). Higher CAR was related to lower PCE, but higher NCE (both p < 0.008).

Conclusion: Pessimism seems to increase the focus on negative aspects of the past, which may lead to a worse perception of life in ageing, whereas optimism contributes to a healthier CAR.