Block 1 (a-priori predictors) Age, sex, study centre, and time

Block 2 (psychological predictors at 1 month) HADS-A, HADS-D, IES-A, IES-I, AUDIT and DAST

Block 3 (potential predictors at baseline) Number of past psychiatric diagnoses, HADS-A, HADS-D, AUDIT, DAST, longstanding illness, work status, ethnicity, deprivation, marital status, length of hospital stay, injury characteristics (severity, number, body part, mechanism, and location)

Block 4 (potential predictors at 1 month) Social functioning, social support, changes in outlook (positive and negative), threatening life events since injury, pain visual analogue scale, compensation, and litigation

AUDIT = Alcohol Use Disorders Identification Test. DAST = Drug Abuse Screening Test. HADS-A = Hospital Anxiety and Depression Scale — anxiety. HADS-D = Hospital Anxiety and Depression Scale — depression. IES-A = Impact of Events Scale avoidance. Impact of Events Scale-I = IES intrusion.