Patient demographic and surgical characteristics in anterior cruciate ligament reconstruction: a description of registries from six countries.

Objective: Findings from individual anterior cruciate ligament reconstruction (ACLR) registry studies are impactful, but how various registries from different countries compare with different patient populations and surgical techniques has not been described. We sought to describe six ACLR registry cohorts to understand variation across countries.

Methods: Five European registries and one US registry participated.

Patients With Concomitant Intra-articular Lesions at Index Surgery Deteriorate in Their Knee Injury and Osteoarthritis Outcome Score in the Long Term More Than Patients With Isolated Anterior Cruciate Ligament Rupture: A Study From the Swedish National Anterior Cruciate Ligament Register.

Purpose: To analyze and compare clinical outcomes after anterior cruciate ligament (ACL) reconstruction 5 and 10 years postsurgery between patients with concomitant intra-articular injuries and those with isolated ACL injury at reconstruction.

Methods: Registrations were made using a web-based protocol by physicians for baseline and surgical data. Patients registered their Knee Injury and Osteoarthritis Outcome Score (KOOS) preoperatively and at 5 and 10 years postsurgery.

Knee Arthroscopic Surgery in Middle-Aged Patients With Meniscal Symptoms: A 3-Year Follow-up of a Prospective, Randomized Study.

Background: The optimal treatment for middle-aged patients with knee pain and meniscal lesions has been extensively debated. Most previous studies have revealed only short-term beneficial results of knee arthroscopic surgery. The authors have previously shown a positive benefit of knee arthroscopic surgery and an exercise program after 1 year when compared with an exercise program alone.

ACL injuries in men's professional football: a 15-year prospective study on time trends and return-to-play rates reveals only 65% of players still play at the top level 3 years after ACL rupture.

Background: Studies investigating the development of ACL injuries over time in football are scarce and more data on what happens before and after return to play (RTP) are needed.

Aim: To investigate (1) time trends in ACL injury rates, (2) complication rates before return to match play following ACL reconstruction, and (3) the influence of ACL injury on the subsequent playing career in male professional football players.

Methods: 78 clubs were followed between 2001 and 2015.

Predictors for additional anterior cruciate ligament reconstruction: data from the Swedish national ACL register.

Purpose: To identify predictors for additional anterior cruciate ligament (ACL) reconstruction.

Methods: Patients from the Swedish national ACL register who underwent ACL reconstruction between January 2005 and February 2013 (follow-up duration 6-104 months) were included. Cox regression analyses included the following independent variables regarding primary injury: age, sex, time between injury and primary ACL reconstruction, activity at primary injury, concomitant injuries, injury side, graft type, and pre-surgery KOOS and EQ-5D scores.

Fewer ligament injuries but no preventive effect on muscle injuries and severe injuries: an 11-year follow-up of the UEFA Champions League injury study.

Background: Limited information is available on the variation in injury rates over multiple seasons of professional football.

Aim: To analyse time-trends in injury characteristics of male professional football players over 11 consecutive seasons.

Methods: A total of 1743 players comprising 27 teams from 10 countries were followed prospectively between 2001 and 2012.

Recurrence of Achilles tendon injuries in elite male football players is more common after early return to play: an 11-year follow-up of the UEFA Champions League injury study.

Background: There is limited information about Achilles tendon disorders in professional football.

Aims: To investigate the incidence, injury circumstances, lay-off times and reinjury rates of Achilles tendon disorders in male professional football.

Methods: A total of 27 clubs from 10 countries and 1743 players have been followed prospectively during 11 seasons between 2001 and 2012.

Return to play after thigh muscle injury in elite football players: implementation and validation of the Munich muscle injury classification.

Background: Owing to the complexity and heterogeneity of muscle injuries, a generally accepted classification system is still lacking.

Aims: To prospectively implement and validate a novel muscle injury classification and to evaluate its predictive value for return to professional football.

Methods: The recently described Munich muscle injury classification was prospectively evaluated in 31 European professional male football teams during the 2011/2012 season.

Injuries affect team performance negatively in professional football: an 11-year follow-up of the UEFA Champions League injury study.

Background: The influence of injuries on team performance in football has only been scarcely investigated.

Aim: To study the association between injury rates and team performance in the domestic league play, and in European cups, in male professional football.

Methods: 24 football teams from nine European countries were followed prospectively for 11 seasons (2001-2012), including 155 team-seasons.

The UEFA injury study: 11-year data concerning 346 MCL injuries and time to return to play.

Background: Medial collateral ligament (MCL) injury is the most common knee ligament injury in professional football.

Aim: To investigate the rate and circumstances of MCL injuries and development over the past decade.

Methods: Prospective cohort study, in which 27 professional European teams were followed over 11 seasons (2001/2002 to 2011/2012).

Upper extremity injuries in male elite football players.

Purpose: To investigate the epidemiology of upper extremity injuries in male elite football players and to describe their characteristics, incidence and lay-off times.

Methods: Between 2001 and 2011, 57 male European elite football teams (2,914 players and 6,215 player seasons) were followed prospectively. Time-loss injuries and exposure to training and matches were recorded on individual basis.

Prevention of acute knee injuries in adolescent female football players: cluster randomised controlled trial.

Objective: To evaluate the effectiveness of neuromuscular training in reducing the rate of acute knee injury in adolescent female football players.

Design: Stratified cluster randomised controlled trial with clubs as the unit of randomisation.

Setting: 230 Swedish football clubs (121 in the intervention group, 109 in the control group) were followed for one season (2009, seven months).

How does comorbidity influence healthcare costs? A population-based cross-sectional study of depression, back pain and osteoarthritis.

Objectives: To analyse how comorbidity among patients with back pain, depression and osteoarthritis influences healthcare costs per patient. A special focus was made on the distribution of costs for primary healthcare compared with specialist care, hospital care and drugs.

Design: Population-based cross-sectional study.

Co-morbidity and health care utilisation five years prior to diagnosis for depression. A register-based study in a Swedish population.

Background: Depressive disorders have been associated with a number of co-morbidities, and we hypothesized that patients with a depression diagnosis would be heavy users of health care services, not only when first evaluated for depression, but also for preceding years. The aim of this study was to investigate whether increased health care utilisation and co-morbidity could be seen during five years prior to an initial diagnosis of depression.

Methods: We used a longitudinal register-based study design.

Sun protection advice mediated by the general practitioner: an effective way to achieve long-term change of behaviour and attitudes related to sun exposure?

Objective: To investigate, in primary health care, differentiated levels of prevention directed at skin cancer, and how the propensity of the patients to change sun habits/sun protection behaviour and attitudes towards sunbathing were affected, three years after intervention. Additionally, the impact of the performance of a phototest as a complementary tool for prevention was evaluated.

Design: Randomized controlled study.

Anterior cruciate ligament injury in elite football: a prospective three-cohort study.

Anterior cruciate ligament (ACL) injury causes long lay-off time and is often complicated with subsequent new knee injury and osteoarthritis. Female gender is associated with an increased ACL injury risk, but few studies have adjusted for gender-related differences in age although female players are often younger when sustaining their ACL injury. The objective of this three-cohort study was to describe ACL injury characteristics in teams from the Swedish men's and women's first leagues and from several European men's professional first leagues.