NJR data collection forms
(MDSv8)
Data from surgical procedures should be entered directly into the NJR data entry system. Where this is not feasible, data collection forms can be used by hospital staff to record data, prior to later electronic submission.
The set of data fields collected by the NJR is known as the Minimum Data Set (MDS). The majority of MDS data fields relate to the patient’s operation details and are collected in the operating theatre. We updated our collection forms in 2023, they are now version 8 (MDSv8). You can find out more about the changes we have introduced to develop our data collection and some useful FAQs here.
- MDSv8 forms can be used for capturing procedures performed before and after 12 June 2023
- Our new suite of forms to support the accurate capture of data for megaprosthesis procedures has been launched on the 29 January 2026. These forms are designed to reflect various clinical scenarios and therefore form to use for each should be selected carefully to ensure submission of the correct data.
- Scroll down this page for the new M forms.
- You can find more information about how to use them here.
An important subset of data fields in the MDS are the patient’s personal details (surname, forename, date of birth, home postcode and NHS number or national patient identifier). Patients must give their consent for this data to be recorded on the registry.
The MDS is periodically reviewed to ensure that it takes account of clinical developments and continues to meet the aims of the NJR in monitoring surgical performance. The Data Entry System (the electronic system for collection and transfer of data) and the MDS proformas (paper forms for recording NJR data prior to electronic submission) are reviewed in line with approved modifications to the dataset.
Previous iterations of NJR MDS forms are available on request by contacting the NJR Service Desk.
Data collection forms for megaprosthesis procedures
The ‘M’ forms have been designed to reflect various clinical scenarios and therefore the form to use for each should be selected carefully to ensure submission of the correct data.
You can find more information about how to use them here.
Reoperations other than revision
The ‘RO’ forms should be used for additional procedure to a joint replacement where there is not addition/ replacement/removal of any component(s). These should always be recorded on a revision proforma.
Collection of Q1P Shoulder PROMs
– mandated by the NHS Standard Contract
In order to be able to assess the benefit gained from having surgery, collecting PROMs pre-operatively is very important in providing a clear understanding of where the patient started in terms of their pain and mobility.
The NJR manages the collection of Shoulder PROMs across all geographical areas covered by the registry. The PROMs questionnaire has previously only been a final section within the main MDS S1 and S2 forms. Based on surgeon feedback a new, separate Q1P PROMs questionnaire has recently been developed. This will help hospitals collect this information more easily, as it will separate the collection of the PROMs, from the procedure data captured at the time of surgery. The new shoulder PROMs form is available with all the MDS forms below.
We would encourage hospital staff to ask patients to complete this questionnaire, preferably at the time of preassessment, at the time that they ask patients to provide consent for their data to be entered onto the registry.
More information about PROMs can be found in the Shoulder section of the NJR Annual Report which can be accessed here.
Minimum Data Set collection forms (MDSv8)
Hip
Knee
Ankle
Elbow
Shoulder
Reoperations other than revision
NJR data entry form – joint selection and usage:
| Joint | Form | Procedures |
|---|---|---|
| Hip | H1 |
|
| H2 |
|
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| Knee | K1 |
|
| K2 |
|
|
| Ankle | A1 |
|
| A2 |
|
|
| Elbow | E1 |
|
| E2 |
|
|
| Shoulder | Q1P |
|
| S1 |
|
|
| S2 |
|