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Contains information on how much data hospitals and treatment centres have submitted to the NJR since the 1st April 2003. Data is provided for whole calendar months and updated on a monthly basis. The statistics are based on the operation date. Data at the hospital level is supplied by both operation date and the date the operation record was submitted to the NJR database. NJR collects information on all hip and knee replacement operations and to monitor the performance of replacement hip and knee joints (implants).

Main Topics/Subject Category
Hip and knee replacement surgery

Total number of operations submitted to the NJR, number of hip procedures, number of knee procedures, NJR consent rate (percentage of submitted records that have njr patient consent).

Hip replacement, knee replacement, joint replacement, mobility
Identifier Variables
SHA, NHS trust, country, postcode, NHS number
Economic/Subject Categories
Area of Health System
Secondary care
Data Available
Data collecting organization (s)
National Joint Registry
Data Type
Coverage (date of field work)
2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
Unit of Analysis

All hip and knee replacements across the NHS and the independent healthcare sector. Sample size varies each year. For example, in 2008 total number of completed operations was 107,656 and 67,982 (year to date 2009)

National Joint Registry
Conditions of Access
Free access
Baker PN, et al. The role of pain and function in determining patient satisfaction after total knee replacement. J Bone Joint Surg 2007; 89: 893-900