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Norm Values for the Subjective Shoulder Value
ESSKA Academy. Kappe T. 05/09/18; 209914; P22-1792 Topic: Arthroscopic Surgery
Assoc. Prof. Thomas Kappe
Assoc. Prof. Thomas Kappe
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Abstract
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Objectives: Age- and gender dependent norm values have been proposed for the most popular shoulder scoring system, the Constant-Murley-Score. Previous studies have alluded to abduction force measurements being the main factor influencing sum scores in these subgroups. Further studies have indicated subjective scoring instruments showing age- and gender dependent variations in the absence of force measurement. The subjective shoulder value (SSV) is a single-item scoring tool that has gained widespread usage due to its high interpretation value and simplicity. The purpose of the present study was to analyze, if age and gender had an effect on the SSV and therefore the use of normalized values would be suitable.

Methods: The SSV was obtained from 191 study participants, 99 women and 92 men, with a mean age of 49 ± 15.7 (range, 17 to 80 years). The participants were recruited from the inpatient pool of our hospital. Patients with an ongoing or previous treatment of the shoulder and/ or cervical spine were excluded from the study. The majority of patients were admitted for hip or knee replacement or lumbar spine surgery. Inclusion was continued until at least 10 persons were included for each gender and every age decade starting from the 3rd to the 7th life decade. Age- and gender adjusted mean values were calculated. Differences between genders and sides were evaluated with a Wilcoxon signed-rank test and ANOVA for age decades.

Results: For women, mean right-sided scores were 0.90 ± 0.3 below 30 years, 0.90 ± 0.3 for age 30 to 39, 0.94 ± 0.09 for age 40 to 49, 0.89 ± 0.18 for age 50 to 59, 0.92 ± 0.12 for age 60 to 69, and 0.92 ± 0.16 for age above 70. The respective values for men were 0.98 ± 0.04 below 30 years, 0.92 ± 0.14 between 30 and 39 years, 0.86 ± 0.22 between 40 and 49 years, 0.95 ± 0.09 between 50 and 59 years, 0.71 ± 0.35 between 60 and 69 years, and 0.78 ± 0.32 for men above 70 years of age. Significant age- and gender related as well as left- to right sided differences were observed (p>0.05).

Conclusions: The results of the present study show age- and gender related variations of the SSV. Substantial deviations from zero were observed in several subgroups, emphasizing the need to relate study results based on the SSV to age- and gender-related norm values.

Keywords:
Subjective Shoulder Value; Norm Values
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