Patient characteristics differently affect early cup and stem loosening in THA: a case-control study on 7,535 patients

Röder, C; Eggli, S; Münger, P; Melloh, M; Busato, A (2008). Patient characteristics differently affect early cup and stem loosening in THA: a case-control study on 7,535 patients. International orthopaedics, 32(1), pp. 33-8. Heidelberg: Springer-Verlag 10.1007/s00264-006-0291-8

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We postulated that certain patient characteristics have different effects on early THA component loosening. With two matched case-control studies we assessed 3,028 cups and 5,224 stems. Loosening was defined using signs of mechanical component failure on routine follow-up radiographs or revision for aseptic loosening. Women and men had similar cup-loosening odds, but women had lower odds for stem loosening (p < 0.0001). Odds for cup loosening decreased by 2.1% per additional year of age (p = 0.0004), those for stem loosening by 2.4% (p < 0.0001). Each additional kilogram of weight decreased cup loosening odds by 1.3% (p = 0.0051). Each additional unit of BMI increased stem loosening odds (p = 0.0109). Charnley classes B and C were protective factors against loosening of both components. There were no risk differences for the various main diagnoses. Certain patient characteristics differently affected early cup and stem loosening, although some characteristics had the same protective or harmful effect on component survival.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute for Evaluative Research into Orthopaedic Surgery

UniBE Contributor:

Röder, Christoph; Eggli, Stefan; Melloh, Markus and Busato, André

ISSN:

0341-2695

ISBN:

18214478

Publisher:

Springer-Verlag

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 14:57

Last Modified:

24 Oct 2019 17:00

Publisher DOI:

10.1007/s00264-006-0291-8

PubMed ID:

18214478

Web of Science ID:

000252626300006

BORIS DOI:

10.7892/boris.24460

URI:

https://boris.unibe.ch/id/eprint/24460 (FactScience: 50764)

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