AbstractObjectiveTo evaluate a primary prevention care model using telephone support delivered through an existing health call centre to general practitioner-referred patients at risk of developing CVD, using objective measures of CVD risk reduction and weight loss.DesignParticipants were randomised into two groups: (i) those receiving a telephone-supported comprehensive lifestyle intervention programme (CLIP: written structured diet and exercise advice, plus seven telephone sessions with the Heart Foundation Health Information Service); and (ii) those receiving usual care from their general practitioner (control: written general lifestyle advice). Fasting plasma lipids, blood pressure, weight, waist circumference and height were assessed on general practice premises by a practice nurse at Weeks 0 and 12.SettingTwo general practices in Adelaide, South Australia.SubjectsForty-nine men and women aged 48·0 (sd5·88) years identified by their general practitioner as being at future risk of CVD (BMI = 33·13 (sd5·39) kg/m2; LDL cholesterol (LDL-C) = 2·66 (sd0·92) mmol/l).ResultsCLIP participants demonstrated significantly greater reductions in LDL-C (estimated mean (EM)= 1·98 (se0·17) mmol/l) and total cholesterol (EM = 3·61 (se0·21) mmol/l) at Week 12 when compared with the control group (EM = 3·23 (se0·18) mmol/l and EM = 4·77 (se0·22) mmol/l, respectively). There were no significant treatment effects for systolic blood pressure (F(1,45) = 0·28,P= 0·60), diastolic blood pressure (F(1,43) = 0·52,P= 0·47), weight (F(1,42) = 3·63,P= 0·063) or waist circumference (F(1,43) = 0·32,P= 0·577).ConclusionsIn general practice patients, delivering CLIP through an existing telephone health service is effective in achieving reductions in LDL-C and total cholesterol. While CLIP may have potential for wider implementation to support primary prevention of CVD, longer-term cost-effectiveness data are warranted.