Normalization of the Constant score

The strength of the normal shoulder may differ by gender and deteriorate with age. Thus, the Constant score may also decrease in absolute value while still reflecting a normal score. To account for age- and gender-related differences, normal results for this scale must be determined across a populat...

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Bibliographic Details
Published in:Journal of shoulder and elbow surgery 2005-05, Vol.14 (3), p.279-285
Main Authors: Katolik, Leonid I., Romeo, Anthony A., Cole, Brian J., Verma, Nikhil N., Hayden, Jennifer K., Bach, Bernard R.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Age Factors
Aged
Biological and medical sciences
Diseases of the osteoarticular system
Female
Health Status Indicators
Humans
Male
Medical sciences
Middle Aged
Muscle, Skeletal - physiology
Range of Motion, Articular
Reference Values
Rotation
Selection Bias
Shoulder - physiology
Shoulder Joint - physiology
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Summary:The strength of the normal shoulder may differ by gender and deteriorate with age. Thus, the Constant score may also decrease in absolute value while still reflecting a normal score. To account for age- and gender-related differences, normal results for this scale must be determined across a population of patients without shoulder disease. Patients presenting for evaluation of nonshoulder conditions participated. A subjective questionnaire was completed. Range of motion and strength were measured. This analysis includes the data of 441 patients. The mean Constant score for men was significantly greater than that for women in each age group ( P < .05). Significant age-related differences were noted in each group ( P < .05). Normative values for the Constant score based on age and gender were determined. The adjusted score represents the gender- and age-matched function of the shoulder and is useful in the evaluation of shoulder outcomes.
ISSN:1058-2746
1532-6500
DOI:10.1016/j.jse.2004.10.009