TY - JOUR
T1 - Time interval affects physical activity scores
T2 - a comparison of the Marx Activity Rating Scale and the Hospital for Special Surgery Pediatric Functional Activity Brief Scale
AU - Marom, Niv
AU - Xiang, William
AU - Heath, Madison
AU - Boyle, Caroline
AU - Fabricant, Peter D.
AU - Marx, Robert G.
N1 - Publisher Copyright:
© 2020, European Society of Sports Traumatology, Knee Surgery, Arthroscopy (ESSKA).
PY - 2020/8/1
Y1 - 2020/8/1
N2 - Purpose: The Marx Activity Rating Scale (Marx Scale) is a commonly used activity-related patient-reported outcome which evaluates the highest activity level within the last year, whereas the Hospital for Special Surgery Pediatric Functional Activity Brief Scale (HSS Pedi-FABS) assesses highest activity level within the last month. This study aims to determine whether the different timeframes used for the common items of Marx Scale and HSS Pedi-FABS affect scores, and if so, to determine whether age or injury status affect this difference. Methods: The Marx Scale and four analogous items on the HSS Pedi-FABS were administered in random order to patients being evaluated for knee injuries and in addition to healthy controls to enroll an uninjured comparison group. Responses to each question were scored from 0 to 4 for a maximum overall score of 16. Paired and independent-sample t tests were used to determine mean differences between groups. Results: The final cohort included 88 participants of which 47% were children (ages 10–17) and 51% had a knee injury. All participants except for healthy adults scored significantly lower on the HSS Pedi-FABS than the Marx Scale (p < 0.05). On the HSS Pedi-FABS activity scale, healthy participants scored significantly higher than injured participants (p < 0.01), but there were no significant differences based on age. Conversely, on the Marx Scale, children scored higher than adults (p ≤ 0.001), but there were no significant differences based on injury. Conclusion: Physical activity level differs when evaluated with the Marx Scale or the analogue part of HSS Pedi-FABS with timeframe being the only difference between the two. The lower scores on the HSS Pedi-FABS are likely due to seasonal changes in activity which do not affect the Marx Scale. HSS Pedi-FABS analyzes a shorter window and it is more likely to capture changes in physical activity due to a recent injury than the Marx Scale which is better suited for assessing general physical activity level unaffected by seasonality or recent injury. Understating the differences between these physical activity scales can better guide clinicians when using them and interpreting scores. Level of evidence: II.
AB - Purpose: The Marx Activity Rating Scale (Marx Scale) is a commonly used activity-related patient-reported outcome which evaluates the highest activity level within the last year, whereas the Hospital for Special Surgery Pediatric Functional Activity Brief Scale (HSS Pedi-FABS) assesses highest activity level within the last month. This study aims to determine whether the different timeframes used for the common items of Marx Scale and HSS Pedi-FABS affect scores, and if so, to determine whether age or injury status affect this difference. Methods: The Marx Scale and four analogous items on the HSS Pedi-FABS were administered in random order to patients being evaluated for knee injuries and in addition to healthy controls to enroll an uninjured comparison group. Responses to each question were scored from 0 to 4 for a maximum overall score of 16. Paired and independent-sample t tests were used to determine mean differences between groups. Results: The final cohort included 88 participants of which 47% were children (ages 10–17) and 51% had a knee injury. All participants except for healthy adults scored significantly lower on the HSS Pedi-FABS than the Marx Scale (p < 0.05). On the HSS Pedi-FABS activity scale, healthy participants scored significantly higher than injured participants (p < 0.01), but there were no significant differences based on age. Conversely, on the Marx Scale, children scored higher than adults (p ≤ 0.001), but there were no significant differences based on injury. Conclusion: Physical activity level differs when evaluated with the Marx Scale or the analogue part of HSS Pedi-FABS with timeframe being the only difference between the two. The lower scores on the HSS Pedi-FABS are likely due to seasonal changes in activity which do not affect the Marx Scale. HSS Pedi-FABS analyzes a shorter window and it is more likely to capture changes in physical activity due to a recent injury than the Marx Scale which is better suited for assessing general physical activity level unaffected by seasonality or recent injury. Understating the differences between these physical activity scales can better guide clinicians when using them and interpreting scores. Level of evidence: II.
KW - Aging athlete
KW - Clinical assessment/grading scales
KW - Medical aspects of sports
KW - Patient-reported outcome
KW - Pediatric sports medicine
UR - http://www.scopus.com/inward/record.url?scp=85079740369&partnerID=8YFLogxK
U2 - 10.1007/s00167-020-05895-9
DO - 10.1007/s00167-020-05895-9
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C2 - 32076731
AN - SCOPUS:85079740369
SN - 0942-2056
VL - 28
SP - 2619
EP - 2625
JO - Knee Surgery, Sports Traumatology, Arthroscopy
JF - Knee Surgery, Sports Traumatology, Arthroscopy
IS - 8
ER -