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Table 1 Schedule of measures for the economic evaluation

From: Economic evaluation of the NET intervention versus guideline dissemination for management of mild head injury in hospital emergency departments

Measures Data collection Timing Source Level
Clinical practice outcomes
 Appropriate PTA screening (PTA)1 Chart audit Retrospectively for 2 months period post-intervention ED medical records of eligible patients Patient
 Provision of written patient information (INFO)
 Safe discharge (SAFED)2
Clinical patient outcomes and health-related quality of life
 Anxiety3 Telephone interview Ave. 210 days post discharge (SD 38.5 days; IQR 181–239; min = 130, max = 321) Patient self-report Patient
 Post-concussive symptoms4
 HRQoL5
Direct cost of the intervention
 Preparation/delivery time and attendance for local training sessions Questionnaire On completion of delivery to all EDs Clinician self-report ED
 Direct cost of all other intervention components Data abstraction and interview On completion of delivery to all EDs Administrative and financial records ED
Health care utilisation and costs
 Medical and surgical services received in the ED/inpatient ward (including CT scan) Chart audit Retrospectively on 2 months period post-intervention ED medical records of eligible patients Patient
 Re-presentation to ED within 1 month of mTBI
 Post-discharge mTBI-related service utilisation Telephone interview Ave. 210 days post discharge (SD 38.5 days; IQR 181–239; min = 130, max = 321) Patient self-report Patient
  1. 1Primary outcome for the economic evaluation
  2. 2Defined as PTA, INFO, and CT where CT denotes whether a CT scan was provided in the presence of a risk factor that justifies the scan (age 65 or older; GCS < 15; amnesia; suspected skull fracture; vomiting and coagulopathy) [26] (assessed in the cohort of patients for whom risk criteria were recorded only). CT therefore indicates whether a scan was appropriately provided but not whether a scan was ‘appropriately denied’. CT and SAFED only assessed in the cohort of patients for whom risk criteria were recorded
  3. 3Anxiety measured using the relevant questions in the Hospital Anxiety and Depression Scale giving a score between 0 and 21, higher scores indicate higher levels of anxiety, and a score > 7 indicative of clinically significant anxiety
  4. 4Post-concussion symptoms measured using the 13-item Rivermead scale giving a score between 0 and 52, higher scores indicate greater severity of post-concussion symptoms
  5. 512-item short form health survey (SF-12 v2) to derive SF-12-based SF6D index scores using the UK weights from Brazier and Roberts [20]. SF12-based SF6D index scores range between 0.350 (the ‘pits’) and 1.000 (full health)