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Department of Psychiatry, St Vincent's University Hospital, Dublin
St Patrick's Hospital, Dublin
Department of Psychiatry, St Vincent's University Hospital, Dublin
Department of Public Health Medicine and Epidemiology, University College, Dublin
Department of Biochemistry, St Vincent's Hospital, Dublin
Department of Psychiatry, St Vincent's University Hospital, Dublin, Ireland
Correspondence: Malcolm Garland, Department of Psychiatry, St Vincent's University Hospital, Elm Park, Dublin 4, Ireland. Tel. : 00 353 1 2094471 ; fax : 00353 1 2837556 ; e-mail : mgarland{at}svherc.ucd.ie
Background Low cholesterol may act as a peripheral marker for parasuicide.
Aims To examine the relationship between total serum cholesterol and psychological parameters in parasuicide.
Method Total serum cholesterol and self-rated scores for impulsivity, depression and suicidal intent were measured in 100 consecutive patients following parasuicide, pair-matched with normal and psychiatric control groups.
Results Backward, stepwise multiple regression analysis revealed a significantly lower mean cholesterol in the parasuicide population (P<0.01). Across all groups there was an independent significant (P<0.01) negative correlation between cholesterol and self-reported scores of impulsivity. No correlation existed between cholesterol and scores for depression or suicidal intent.
Conclusions The data confirm previous reports of low cholesterol in parasuicide. This is the first reported investigation of the construct of impulsivity in relation to cholesterol. We hypothesise that the reported increased mortality in populations with low cholesterol may derive from increased suicide and accident rates consequent on increased tendencies to impulsivity in these populations.
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