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Cox proportional hazards models adjusting for age and sex were used to compare revision rates.
Hazard ratios (HRs) from Cox proportional hazards models, adjusting for age and sex where appropriate, were used to compare revision rates.
The aim was to compare revision rates due to infection in different time periods and different patient and implant groups, and to investigate factors that influence the risk of revision due to infection.
Our main interest was to compare revision rates between resurfaced patellas at primary arthroplasty (the resurfacing group, R) and non-resurfaced patellas at primary arthroplasty (the no-resurfacing group, NR).
In most of the instances where we compared revisions between groups for example, age groups or prosthesis type if the KM estimate was higher in one group than in another, so too (in general) would the CIF be.
Adjustment for age and sex was made, where appropriate, when comparing revisions over the entire period, using either log-rank tests or hazards ratios from proportional hazards models as appropriate.
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We compared revision rates following primary THA between TM and non-TM-coated acetabular components.
Limited data are available comparing revision rates between cemented and cementless glenoid fixation in TSA.
A second study did not seem to adjust for age when comparing revision rates across prostheses types, despite age differences of 4.5 years.
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CEO of Professional Science Editing for Scientists @ prosciediting.com