Key result
The Instability Severity Index Score (ISIS) did not predict recurrent shoulder dislocation, which occurred in 30.6% of patients after a first conservatively treated episode.
Why the study?
The study was conducted to verify the association between the Instability Severity Index Score and recurrent shoulder dislocation after a first conservatively treated episode, and to identify associated risk factors.
Does the Instability Severity Index Score (ISIS) predict Recurrent Shoulder Dislocation (RSD) in patients with a first traumatic anterior shoulder dislocation treated conservatively?
Cohort (n=85)
No
Does the Instability Severity Index Score (ISIS) predict Recurrent Shoulder Dislocation (RSD) in patients with a first traumatic anterior shoulder dislocation treated conservatively?
The Instability Severity Index Score (ISIS) does not predict recurrent shoulder dislocation after a first conservatively treated episode, though high-risk work and rotator cuff injuries are significant risk factors.
ISIS should not yet inform risk stratification after first anterior shoulder dislocation; leaves open confirmation of high-risk work and rotator cuff injury associations.
The first purpose of this study was to verify the association between Instability Severity Index Score (ISIS) and Recurrent Shoulder Dislocation (RSD) after a first episode treated conservatively. The second aim is to identify the risk factors associated with RSD after a primary acute shoulder anterior dislocation treated conservatively. A total of 111 patients with first traumatic anterior shoulder dislocation treated at a single trauma centre between January 2014 and March 2016 were enrolled. The main predictive variables of risk factors and the ISIS score were calculated. Among the 85 patients included, 26 cases of RSD were observed (30.6%). Considering the whole population, no significant association between ISIS and RSD were reported. Regarding other risk factors, high-risk working activities and rotator cuff injury had a significantly higher RSD risk. Sex, dominant limb, familiar history, hyperlaxity, contact or overhead sports, competitive sport, post-reduction physiokinesitherapy, return to sports activity time, Hill-Sachs lesion, bony Bankart lesion and great tuberosity fracture did not seem to influence the risk of RSD. No correlation between ISIS score and RSD in patients treated conservatively after a first episode of shoulder dislocation were reported. The only risk factors with a significant association to RSD were high-risk working activities and rotator cuff injury.
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Longo et al. (2021) conducted a cohort in First traumatic anterior shoulder dislocation (n=85). Instability Severity Index Score (ISIS) was evaluated on Recurrent Shoulder Dislocation (RSD). The Instability Severity Index Score (ISIS) did not predict recurrent shoulder dislocation, which occurred in 30.6% of patients after a first conservatively treated episode.
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