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. 2007 Jul 18;2007(3):CD003494. doi: 10.1002/14651858.CD003494.pub2

Blankenstein 2001.

Methods RCT to compare two conditions. Randomisation performed on practice level. Assessments on three occasions: baseline, 1 and 2 years.
Participants 162 patients (aged 20‐45) who were true or part somatisers (frequent GP attenders, 15 visits or more in 3 years and 5 or more somatisation symptoms) recruited from 20 GPs in 17 practices. Therapists: 10 GPs.
Interventions T (n:75) = tailored and modified reattribution intervention (dealing with illness worry, feeling understood, broadening the agenda, making the link) and care as usual, 2‐3 10‐30‐min sessions. 
 C (n:87)= care as usual. 
 Therapists received 20‐hr training programme (application intervention, feedback on audiotaped consultations) and booster sessions in first year. Supervision of therapists unknown.
Outcomes Two year follow‐up: complete attribution achieved in 33 of 51 patients. T superior to C on all primary outcomes: medical consumption, subjective health (VAS), sick leave. No complete recovery in either groups (not supported by data).
Notes non‐compliance: T=24/75. 
 withdrawal: 
 T=7/75, C=6/87. 
 no integrity check.
Risk of bias
Bias Authors' judgement Support for judgement
Allocation concealment? Low risk A ‐ Adequate