Table 1.

Demography of knee arthroplasty procedures reported to the Norwegian Arthroplasty Registry (NAR) and compensation claims filed with the Norwegian System of Patient Injury Compensation (NPE) during 2008–2018

Factor	Knee procedures reported to NAR n = 64,241	Compensation claims filed to NPE n = 572	Accepted claims n = 312 (54.5%)	Rejected claims n = 260 (45.5%)	p-value a
Mean age (SD)	68 (9.7)	62 (10)	63 (9.9)	61 (11)
range	12–101	24–86	38–86	24–85
Females, n (%)	38,352 (60)	324 (57)	169 (54)	155 (60)	< 0.001

SD, standard deviation.

^a Chi-square test comparing proportion of women reported to NAR with proportion of women filing a complaint to NPE.