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Abbreviations: Late referral, course in a nephrology department ≤16 weeks; OR, odds ratio; 95 % CI, 95%% confidence interval.
In patients completing a first referral course, median weight loss was 5.4 kg (5.6% initial weight), with more than half losing ≥5%.
Analysis of those who completed all 12 sessions of a first recorded referral course (n = 11,851) showed that median weight change was -5.4 kg (IQR -7.8 - -3.1 kg), or -5.6% (IQR -8.1 - -3.2%) initial weight.
Median weight at the start of the referral course was 94.3 kg (IQR 83.7 - 107.7 kg) and median start BMI was 35.1 kg/m2 (IQR 31.8 - 39.5 kg/m).
Data were analysed for all referrals attending a first meeting and for participants completing all 12 sessions of a first referral course during the audit period (completers only analysis).
Weight change by referral course number for an individual ('referral rank') is illustrated in Figure 2. Weight loss per course decreased with increasing rank, although later courses did result in small additional weight loss.
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In the 1980s, Wooller set up referral courses in the United Kingdom costing £500, which were offered on a "no pass no fee" basis provided the student had completed a 200-hour work programme and a minimum of 10 tests.
Attendance for the 29,326 referral courses is shown in Figure 1.
In the present analysis over 54% of commenced referral courses were completed.
Data from 29,326 referral courses (99%) were included in the final analyses.
The complete dataset contained 29,560 referral courses in which the patient commenced the referral by attending at least one WW meeting.
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