This study (n=126, mean age=68.8 years, males=62) evaluated pre-operative WOMAC pain and physical function, age, gender, general health status, revision severity classification, number of revisions, comorbidity and unilateral vs. bilateral surgery as predictors of WOMAC pain and physical function at twenty-four months post revision hip arthroplasty. Pain improved from 9.3 to 3.6 and physical function improved from 35.4 to 17.1. No factors were predictive of patient function. Decreased pain was predicted by less pain pre surgery (p=0.01) and being male (p=0.04).

To determine if pre-operative WOMAC pain and physical function, age, gender, general health status (SF-36), revision severity classification, number of revisions, comorbidity and unilateral vs. bilateral surgery are predictive of WOMAC pain and physical function at twenty-four months post revision hip arthroplasty.

Physical function at twenty-four months is not independently predicted by the pre-treatment factors evaluated in this study. Male patients with less pain pre surgery and little comorbidity have less pain post surgery.

With the exception of pre-treatment pain, the pre-treatment factors tested in this study provide minimal guidance in identifying factors that might be modified to enhance patient outcome.

This prospective cohort study included one hundred and twenty-six patients (mean age=68.8 years, males: females=62:64) who had revision for other than infection or peri-prosthetic fracture. On average from pre-surgery to twenty-four months post-surgery, WOMAC pain improved 9.3 to 3.6 and physical function improved from 35.4 to 17.1. In univariate analysis (t-test, p< 0.05), males tended to have better function (19.6 vs. 14.7) and reported less pain (4.4 vs. 2.8). No other factors were significant in univariate analysis. None of the a priori factors noted above were independently predictive of patient function at twenty-four months in the multivariate model (F=2.06, p=0.04, R²=0.16). Decreased pain with activity at twenty-four months independently was predicted by having less pain pre surgery (p=0.01), being male (p=0.04) and having fewer comorbidities (p=0.07) in the multi-variate model (F=2.9. p=0.004, R²=0.21).

Funding: This work was supported by a grant from The Arthritis Society

Introduction: Closed and open grade I (low energy) tibial shaft fractures are a common and costly event and optimal management for such injuries remains uncertain.

Methods: We explored costs associated with treatment of low energy tibial fractures with either casting, casting with therapeutic ultrasound, or intramedullary nailing (with and without reaming) by use of a decision tree.

Results: From a governmental perspective the mean associated costs were USD $3 365 (standard deviation [SD] ± 1 425) for operative management by reamed intramedullary nailing, $5 041 (SD ± 1 363) for operative management by non-reamed intramedullary nailing, $5 017 (SD±1 370) for casting, and $5 312 (SD±1 474) for casting with therapeutic ultrasound. From a societal perspective the mean associated costs were ($12 449; SD±4 894) for reamed intramedullary nailing, ($13 266; SD±3 692) for casting with therapeutic ultrasound, ($15 571; SD±4 293) for operative management by non-reamed intramedullary nailing, and ($17 343; SD±4 784) for casting alone.

Interpretation: Our analysis suggests that, from an economical standpoint, reamed intramedullary nailing is the treatment of choice for closed and open grade I tibial shaft fractures. There is preliminary evidence, from a societal perspective, that treatment of low energy tibial fractures with therapeutic ultrasound and casting may also be an economically-sound intervention.