The application of pharmacoinformatics in enhancing pharmaceutical care of patients with cancer

Ph.DDOCTOR OF PHILOSOPH

Evidence Synthesis of Shoulder Pain Among Canadian Firefighters

Injury or degeneration of rotator cuff tendon leads to rotator cuff disease (subacromial impingement syndrome and rotator cuff tears). Shoulder pain – pain in the upper arm close to the deltoid muscle insertion has been reported as the most common symptom for subacromial impingement syndrome and rotator cuff tears. However, the current state of evidence on treatment effectiveness of rotator cuff disease is indeterminate. The shoulder function is essential for many of the physically demanding tasks that firefighters perform on the fire ground. For fire services and firefighters, the preservation of active duty is critical for their continued service to their communities. However, the prevalence of shoulder pain among Canadian firefighters has not been synthesized. Further, high quality randomized clinical trials (RCTs) provide the highest level of evidence and assist in clinical decision making. The International Committee of Medical Journal Editors (ICMJE) recommendation of RCT trial registration in public trials registry has been made to improve the reporting, transparency, rigor and reproducibility in RCTs. However, there is a paucity of evidence on the proportion of RCTs with proper trial registrations in the field of rehabilitation therapy. Therefore, the purposes of this thesis were 1) to assess the effects of arthroscopic versus mini-open rotator cuff repair surgery on function, pain and range of motion at in patients with rotator cuff tears; 2) to quantify the effects of surgical vs conservative interventions on clinical outcomes of pain and function in patients with subacromial impingement syndrome; 3) to assess the prevalence of musculoskeletal disorders (MSDs) among Canadian firefighters, 4) to examine the proportion of RCTs that were reported to have been prospectively, retrospectively registered or not registered in the field of rehabilitation therapy, and 5) to use the synthesized evidence to inform the design of a single center (fire-station), investigator-blinded, randomized, 12-month, parallel-group, superiority trial for the evaluation of the efficacy of a shoulder exercises on clinical outcomes in firefighters with shoulder pain. From the existing literature, we found evidence that both arthroscopic and mini-open techniques to rotator cuff repairs with post-operative rehabilitation exercises were effective in improving clinical outcomes of function, pain and shoulder range of motion in patients with rotator cuff tears. However, the between-group differences in outcomes were too small to be clinically important. The effects of surgery plus physiotherapy (exercises) vs physiotherapy (exercises) alone on pain and function were too small to be clinically important at 3-, 6-months, 1-, 2-, 5- and ≥ 10-years follow up. This further highlighted that rehabilitation exercises be considered as the first treatment approach in patients with shoulder pain. We also identified high point-prevalence estimates (1 in 4 firefighters) of shoulder-, back-, and knee-related MSDs among Canadian firefighters (shoulder pain was 23%). Our review study indicated that fifteen years after the introduction of standards for RCT registration by ICMJE, only one-third of the RCTs in the field of rehabilitation therapy were prospectively registered. Subsequently, the emergence of further evidence (observational studies in firefighters and RCTs in active-duty military personnel) indicating the clinical effectiveness of occupation-specific rehabilitation exercises along with our evidence syntheses provided the rationale for the design and conduct of an RCT to assess the effectiveness of firefighter-specific rehabilitation exercises among Canadian firefighter with shoulder pain

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