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Comparative Study
. 2009 Dec;80(6):639-45.
doi: 10.3109/17453670903506658.

Increasing risk of revision due to deep infection after hip arthroplasty

Håvard Dale  1 , Geir Hallan, Geir Hallan, Birgitte Espehaug, Leif I Havelin, Lars B Engesaeter
Affiliations
Comparative Study

Increasing risk of revision due to deep infection after hip arthroplasty

Håvard Dale et al. Acta Orthop. 2009 Dec.

Abstract

Background and purpose: Over the decades, improvements in surgery and perioperative routines have reduced the incidence of deep infections after total hip arthroplasty (THA). There is, however, some evidence to suggest that the incidence of infection is increasing again. We assessed the risk of revision due to deep infection for primary THAs reported to the Norwegian Arthroplasty Register (NAR) over the period 1987-2007.

Method: We included all primary cemented and uncemented THAs reported to the NAR from September 15, 1987 to January 1, 2008 and performed adjusted Cox regression analyses with the first revision due to deep infection as endpoint. Changes in revision rate as a function of the year of operation were investigated.

Results: Of the 97,344 primary THAs that met the inclusion criteria, 614 THAs had been revised due to deep infection (5-year survival 99.46%). Risk of revision due to deep infection increased throughout the period studied. Compared to the THAs implanted in 1987-1992, the risk of revision due to infection was 1.3 times higher (95%CI: 1.0-1.7) for those implanted in 1993-1997, 1.5 times (95% CI: 1.2-2.0) for those implanted in 1998-2002, and 3.0 times (95% CI: 2.2-4.0) for those implanted in 2003-2007. The most pronounced increase in risk of being revised due to deep infection was for the subgroup of uncemented THAs from 2003-2007, which had an increase of 5 times (95% CI: 2.6-11) compared to uncemented THAs from 1987-1992.

Interpretation: The incidence of deep infection after THA increased during the period 1987-2007. Concomitant changes in confounding factors, however, complicate the interpretation of the results.

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Figures

Figure 1.
Figure 1.
Percentage revision due to deep infection, for all THAs, for cemented THAs, and for uncemented THAs, for 4 periods of primary surgery, adjusted for sex, age, diagnosis, prosthesis, operation room ventilation, duration of operation, and antibiotic prophylaxis.
Figure 2.
Figure 2.
Graphical display of the relationship between year of primary surgery and risk of revision due to deep infection (with 95% CI) for all THAs, cemented THAs, uncemented THAs, and Charnley THAs with uniform antibiotic prophylaxis, adjusted for sex, age, diagnosis, prosthesis, operation room ventilation, duration of operation, type of fixation, and antibiotic prophylaxis.
Figure 3.
Figure 3.
Percentage revision due to aseptic loosening, for all THAs, for 4 periods of primary surgery, adjusted for sex, age, diagnosis, prosthesis, operation room ventilation, duration of operation, type of fixation, and antibiotic prophylaxis.
See this image and copyright information in PMC

Comment in

References

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