Behaviour change among people with impaired glucose tolerance: Comparison of telephone-based and face-to-face advice

Objectives To develop, implement and compare two lifestyle services for people at risk of developing type 2 diabetes. Methods Two localities were selected to implement two different service delivery models, telephone-based and face-to-face, supporting people at risk of developing type 2 diabetes. Impact was assessed by comparing weight, fasting plasma glucose and oral glucose tolerance test (OGTT) results at baseline and six months later. Results Both services were associated with an improvement in OGTT 2-h plasma glucose and weight. In the telephone intervention, 47.3% of participants who completed the project achieved both normal fasting plasma glucose (≤6.0 mmol/l) and normal plasma glucose levels (≤7.7 mmol/l). Participants had a mean weight loss of 3.3 kg (SD 4.3), equating to 3.4% of body weight (p