The Client Service Receipt Inventory (CSRI) is a research instrument developed by Martin Knapp and Jennifer Beecham in the mid 1980s to collect information on service utilisation, income, accommodation and other cost-related variables. Its primary purpose is to allow resource use patterns to be described and support costs to be estimated using an appropriate unit cost.

Typically, the CSRI has five sections:

  • Background client information, such as study identification number, age, gender and other socio-demographic information. It may also include past admissions/discharges from hospital or participation in special programmes depending on the study and information available.
  • Accommodation and living situation which can identify housing tenure or facility type and region (some geographic areas are more costly to live in than others). More about this topic can be found here.
  • Employment history, earnings and benefits which may assist with calculations of cost of lost employment due to poor health.
  • A record of services that may be used usually grouped into subsections such as hospital care, primary care, community-based specialist or generic health care, social care etc. Questions on prescribed medication can be included here.
  • Information about support from unpaid carers.

The CSRI can be used at multiple points within a study, thus tracking changes over time.

One of the CSRI’s greatest strengths is its adaptability. Originally designed to cover about six A4 sheets of paper and taking about 20 minutes to complete, the CSRI undergoes careful scrutiny at the start of each study to ensure it is compatible in format, language, scope and content with the research aims, context, participants’ likely circumstances, and the quantity and precision of information required.

The CSRI is also adaptable in administration. While it was originally designed to be administered to the service user or their carer face to face with a trained interviewer, the CSRI has been successfully administered via post for the service user to complete by themselves, and in a telephone interview. However, an interview is generally the preferred method to ensure as much relevant information as possible is obtained.

Examples of the CSRI may be found here.

The CSRI has been used in over 500 studies. An international version, the CSSRI and a version for studies including children have also been developed, using the original framework.

Using the CSRI allows for a wide range of analyses to be conducted. This can include a valuation of the services recorded, which requires unit cost data. The PSSRU annual compendium of unit costs has proven invaluable for many researchers using the CSRI.