Patients Undergoing Shoulder Stabilization Surgery Have Elevated Shoulder Activity Compared With Sex- and Age-Matched Healthy Controls.
BACKGROUND
Shoulder activity level may be a risk factor for shoulder instability, an indication for surgical intervention, and a risk factor for failure of operative stabilization.


OBJECTIVE
Patients undergoing shoulder stabilization surgery have a higher activity level compared with sex- and age-matched healthy controls.


METHODS
Cross-sectional study.


METHODS
Level 2.


METHODS
Patients undergoing shoulder stabilization surgery aged 18 to 50 years were prospectively enrolled. As part of data collection, patients completed a previously validated shoulder activity scale, which generates a score reporting frequency of activity ranging from 0 (least active) to 20 (most active). The activity level of these patients was compared with sex- and age-matched norms for a healthy population with no history of shoulder disorders.


RESULTS
A total of 409 subjects (343 male, 66 female) undergoing shoulder instability surgery completed the activity scale. Seventy-seven percent of patients had higher shoulder activity level than sex- and age-matched controls. Seventy-nine percent aged 18 to 30 years had a higher shoulder activity level than controls, with an identical distribution for men (79%) and women (79%). Among patients aged 31 to 50 years, 70% had higher activity than controls. However, men were more likely to have a higher activity level than controls (72%) versus women (59%). In patients aged 18 to 30 years, median activity level for instability patients was 14 in men compared with 10 in controls, and 13 in women compared with 8 in controls. In patients aged 31 to 50 years, median activity level was 13 in men compared with 10 in controls and 10 in women compared with 8 in controls.


CONCLUSIONS
Patients undergoing shoulder stabilization surgery have a higher activity level than sex- and age-matched healthy controls.


CONCLUSIONS
Shoulder activity is especially elevated in younger, male instability patients.
Washington University School of Medicine, St Louis, Missouri brophyr@wudosis.wustl.edu.
Robert H
RH
Brophy
University of Iowa, Iowa City, Iowa.
Carolyn M
CM
Hettrich
University of Iowa, Iowa City, Iowa.
Shannon
S
Ortiz
University of Iowa, Iowa City, Iowa.
Brian R
BR
Wolf
activity level; instability; labral tear; shoulder; stabilization surgery