Obesity is a common in individuals undergoing arthroplasty, and the potential for weight loss with improved mobility may be expected by some. The aim of this study was 1. determine the proportion that achieved weight loss after hip or knee arthroplasty, and 2. examine the effect of obesity on patient reported outcomes (PROMS) and satisfaction with surgery.

Participants underwent primary TKA or THA between July 2015 and December 2020 and consented to participation in a research database with baseline PROMS, including weight, BMI, Oxford Knee, or Hip Score, and EQ5D. Participants repeated PROMS at 12 months after surgery with additional questions regarding satisfaction with surgery.

3449 patients completed PROMS 1 year after arthroplasty with weight and BMI. There were 1810 THA and 1639 TKA procedures. The mean baseline BMI was higher in TKA (29.8, SD 5.2) compared to THA (27.7, SD 5.0), p=0.001. A higher proportion of TKA were classified as obese class 1 (29% TKA, 19% THA), obese class 2 (11% TKA and 6% THA), and obese class 3 (5% TKA and 2% THA), p=0.001. The mean weight loss after 1 year was 0.4kg and 0.9kg in obese THA subjects and TKA subjects respectively. In the obese >5kg weight loss was achieved in 13% of TKA and 7% of THA (p=0.001). Obese experienced equivalent improvement in Oxford scores, compared to non-obese subjects. Satisfaction with surgery was reported by 95% of THA and 91% of TKA subjects with no significant differences between BMI group grades (p=0.491 THA and p=0.473 TKA).

Preoperative obesity was observed in 44% of TKA and 27% of THA subjects. In the obese only 1 in 10 subjects lost 5kg or more over 12 months. Obese patients experienced equivalent improvements in outcome after arthroplasty and rates of satisfaction with surgery to the non-obese.

Introduction The aim of this study was to assess trends in the circumstances of spinal cord injury in all codes of football played in Australia in 1997 to 2002, and to combine and contrast these findings with those of identical studies done covering earlier years (1960 to 1996).

Methods A retrospective review of all spinal cord injuries occurring in all codes of football 1997 to 2002, combining and contrasting the results with identical studies done covering the years 1960 to 1985 and 1986 to 1996. Every football player with a documented spinal cord injury admitted to one of the spinal cord injury units across Australia was included. Data was recorded by way of record and radiograph review, and patient interview.

Results Fifty-four footballers were admitted to the spinal injury units over the period. The average yearly frequency of injuries over the study period was higher than the period 1986 to 1996, and similar to the period 1977 to 1985. The annual incidence of injury was lower in every sport except soccer, although data still remains to be collected from Victoria which may affect the incidence pertaining to Australian Rules. Rugby League had the biggest decrease in incidence. Most notable was the absence of any scrum injuries in league, down from nine (24% of all league injuries) in the prior study. Scrums sustained at engagement remained a prevalent cause of injury in Union. They by far predominated over those in collapsed scrums, reversing the trend towards the latter noted in the prior study. One-third of scrum injuries were in adult front-rowers who had played between one and four games in the front-row in their careers. The incidence of schoolboy injuries overall decreased substantially. The tackle accounted for all League and 40% of Union injuries. Over 75% of known tackle injuries on the ball carrier involved two or more tacklers at once. A much smaller percentage of patients remain wheelchair dependent (30%) than in the last study, and nearly 15% returned to near normality.

Conclusions Spinal cord injuries remain a significant concern in football, particularly the rugby codes. While the incidence overall may have slightly decreased, attention is needed to enforcing scrummaging laws, particularly in adult rugby, and focusing on the gang tackle as a cause of increased injuries in League and Union. An adequate compensation scheme and a national registry also need realisation.