Abbreviations

CNS

Central nervous system

DF

Degrees of freedom

DSM-III-R

Diagnostic and Statistical Manual of Mental Disorders, Third edition, revised

FHDR

Finnish Hospital Discharge Register

IQ

Intelligence Quotient

ICD

International Classification of Diseases

MPA

Minor physical abnormality

OR

Odds ratio

RH

Relative hazard

95% CI

95% confidence interval