Mortality rates in psychiatric patients have been reported as higher than those of the general population in Scandinavia (Odegaard, 1952), the United States (Gorwitz et al., 1966; Babigian and Odoroff, 1968), and Scotland (Innes and Millar, 1970). These findings may be related both to a greater prevalence of physical disease amongst psychiatric patients (Kay and Roth, 1955; Culpan et al., 1960; Shepherd et al., 1964; Kay and Bergman, 1966; Eastwood and Trevelyan, 1972) and to a greater frequency of suicide (Stenstedt, 1952; Stenstedt, 1959; Pokorny, 1964).