Primary andsecondary prevention trials incoronary heart disease

Summary Trials inprimary andsecondary prevention ofcoronary heart disease (CHD)arereviewed. Theresults ofcompleted primary prevention trials suggest thatdietary changes inmiddle-aged menmaylower theincidence ofCHD.Multifactorial trials mayachieve aneven greater reduction inCHD.Secondary prevention trials indicate thatstopping smoking andtheuseofbetablocking agents areeffective inreducing recurrence rates.