NEIAA measures the quality of care delivered to patients in England and Wales with suspected and newly diagnosed early inflammatory arthritis (EIA). Quality of care is measured against the best practice guidelines set out by NICE quality standard 33 (QS33). This is the fifth NEIAA annual report and the first State of the Nation report for the programme, presenting data on five key metrics of care: time to referral, time to assessment, time to treatment, response to treatment and patient-reported outcome measures (PROMs).