Table 1

First wave intervention delivery approach across providers

National providers
ABCD
Core sessionsSix group closed core sessions (of 90 min), held on alternate weeksSix group sessions, held weeklyFour group core sessions (of 90 min), held weeklyOne (individual session) and seven group sessions (of 60–90 min), held weekly
Follow-up/maintenance sessionsOne individual review session (of 60 min) held at month 3
Four open group maintenance sessions (of 60 min)
Four sessions, held fortnightly Six sessions held monthlyNine maintenance sessions, held monthlySix programmed support contacts over the 12 months of the Diabetes Prevention Programme, held at months 2, 3, 4, 5, 6, 9 and 12
Review sessionsFollow-up
reviews, held at 6 and 9 months
Two review sessions