• iProductivity Cost Questionnaire (iPCQ)
    (in English, Dutch, Czech, Danish, Finnish, French, German, Hungarian, Italian, Korean, Norwegian, Polish, Portuguese, Romanian, Spanish and Turkish).
  • iMedical Consumption Questionnaire (iMCQ)
    (in English, Dutch, Danish, Finnish and Turkish).
  • Treatment Inventory of Costs in Patients with psychiatric disorders (TIC-P).
    Adults (Dutch, English and Portuguese), TIC-P Kinderen (in Dutch), TIC-P Midi Volwassenen (in Dutch).
    Note: The TIC-P Midi can be used in populations that correspond to the population in the publication by Timman et al. (2015), i.e. institutionalized patients with personality disorders. In other populations, i.e. those receiving more outpatient care, the use of the full-length TIC-P is recommended, as discussed in Kanters et al. (2019).


  • iProductivity Cost Questionnaire (iPCQ) (in Dutch and English).
  • iMedical Consumption Questionnaire (iMCQ) (in Dutch and English).
  • TIC-P Adults (in Dutch and English).
  • TIC-P Kinderen (in Dutch).

Registration form


  • Bouwmans C, De Jong K, Timman R, Zijlstra-Vlasveld M, Van der Feltz-Cornelis C, Tan SS, Hakkaart-van Roijen L. (2013) Feasibility, reliability and validity of a questionnaire on healthcare consumption and productivity loss in patients with a psychiatric disorder (TiC-P). BMC Health Services Resarch. 13:217
  • Bouwmans C, Krol M, Severens H, Koopmanschap M, Brouwer W, Hakkaart-van Roijen L. (2015) The IMTA Productivity Cost Questionnaire: A standardized instrument for measuring and valuing health-related productivity losses. Value in Health. 18:753-758
  • Timman R, Bouwmans C, Busschbach JJV, Hakkaart-van Roijen L (2015) Development of the Treatment Inventory of Costs in Psychiatric Patients: TIC-P Mini and Midi. Value in Health. 18:994-999
  • Kanters TA, Timman R, Zijlstra-Vlasveld M, Muntingh A, Huijbregts KM, Van Steenbergen-Weijenburg KM, Bouwmans CAM, Van der Feltz-Cornelis CM, Hakkaart-van Roijen L (2019) Assessing costs using the Treatment Inventory Cost in Psychiatric Patients (TIC-P), TIC-P Mini and TIC-P Midi. The Journal of Mental Health Policy and Economics. 22:15-24