Table 2.

Cumulative incidence of prosthetic joint infection following primary total hip arthroplasty (THA)

Register	No. of primary THAs	No. of revisions	Cumulative incidence (%) (95% CI)
1 year
DHR	32,896	167	0.51 (0.44–0.59)
NRP	32,896	158	0.48 (0.41–0.56)
Algorithm	32,893	285	0.86 (0.77–0.97)
2 years
DHR	27,906	185	0.61 (0.52–0.70)
NRP	27,906	150	0.54 (0.46–0.63)
Algorithm	27,903	266	0.96 (0.85–1.08)
5 years
DHR	13,175	84	0.64 (0.51–0.79)
NRP	13,175	75	0.57 (0.45–0.71)
Algorithm	13,172	136	1.03 (0.87–1.22)

DHR: the Danish Hip Arthroplasty Register;

NRP: the National Register of Patients.