Three analyses were conducted. First, patient characteristics collected at baseline, including illness characteristics and the patient‚ reported relationship with their clinical key worker, were tested as potential predictors of the employment outcomes. Second, early process factors, collected at patient level at the first follow-up interview (T1), when the patient had been in the service for up to 6 months, were tested as potential predictors. Service allocation (IPS v. vocational service) was included as a possible explanatory variable in the early process models, despite the fact that the greater effectiveness of the IPS service had already been demonstrated.7 This was to ensure that it was not confounding any significant associations between other potential predictor variables and employment outcomes. It was not included in the patient characteristics models, as these variables were measured before randomisation. The impact of service as such is not the focus of the current paper. Finally, key characteristics of the services themselves were tested. As the latter were service-level factors, they were tested against the effectiveness of the IPS service at each international centre.