Study objective - To explore the link between serum cholesterol and su
icide by investigating the relation between serum lipids and depressiv
e symptoms. Design - This was a cross sectional study of the relation
between serum cholesterol, low density lipoprotein (LDL) cholesterol,
high density lipoprotein (HDL) cholesterol, and triglycerides on the o
ne hand and depressive symptoms as expressed in a questionnaire on the
other. Setting - An organisational development programme in industry
with assistance from occupational health care. Participants - A total
of 644 male and 261 female employees (mainly white-collar workers) par
ticipated. Main results - Total cholesterol and LDL cholesterol values
were lower in those men who, sometimes, often, or very often, had exp
erienced low mood or glumness during the past month compared with thos
e who had not. Serum triglyceride concentrations did not differ betwee
n the groups. In women, however, the serum triglyceride value, but not
the total cholesterol or LDL cholesterol, was lower in those who repo
rted low mood, depression, or anxiety during the past six months. Conc
lusions - Decreasing appetite as a consequence of depression in men wo
uld probably lead to both decreasing cholesterol and triglyceride conc
entrations. Thus, these data indicate the presence of some other expla
nation for the relation between the level of LDL cholesterol and depre
ssive symptoms in men.