Baseline enjoyment of life and gait speed 8 years later among groups with low (square), medium (triangle) and high (circle) enjoyment of life. CI = confidence interval. *Demographic factors include wealth, education, ethnicity, marital status and employment. †Health indicators include limiting, longstanding illness; coronary heart disease; cancer; stroke; chronic lung disease; diabetes; and arthritis. ‡Depression includes depressive illness and current symptoms of depression. §Health behaviours include physical activity, smoking and alcohol intake. ¶Physical impairment includes impaired mobility and activities of daily living.