The DOI matches its Crossref record; 38 of the 38 references it cites were found in a registry or an index.
Hop Testing Provides a Reliable and Valid Outcome Measure During Rehabilitation After Anterior Cruciate Ligament Reconstruction
Open accessAbstract
Background and Purpose: Although various hop tests have been proposed as performance-based outcome measures following anterior cruciate ligament (ACL) reconstruction, limited reports of their measurement properties exist. The purpose of this study was to investigate the reliability and longitudinal validity of data obtained from hop tests during rehabilitation after ACL reconstruction. Subjects: Forty-two patients, 15 to 45 years of age, who had undergone ACL reconstruction participated in the study. Methods and Measures: The study design was prospective and observational with repeated measures. The subjects performed a series of 4 hop tests on 3 separate occasions within the 16th week following surgery and on a fourth occasion 6 weeks later. The tests were a single hop for distance, a 6-m timed hop, a triple hop for distance, and crossover hops for distance. Performance on the ACL-reconstructed limb was expressed as a percentage of the performance on the nonoperative limb, termed the “limb symmetry index.” Subjects also completed the Lower Extremity Functional Scale and a global rating of change questionnaire. Results: Intraclass correlation coefficients for limb symmetry index values ranged from .82 to .93. Standard errors of measurement were 3.04% to 5.59%. Minimal detectable changes, at the 90% confidence level, were 7.05% to 12.96%. Changes in hop test scores on the operative limb were statistically greater than changes on the nonoperative limb. Pearson correlations (r) between change in hop performances and self-reported measures ranged from .26 to .58. Discussion and Conclusion: The results show that the described series of hop tests provide a reliable and valid performance-based outcome measure for patients undergoing rehabilitation following ACL reconstruction. These findings support the use and facilitate the interpretation of hop tests for research and clinical practice.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
Intraclass correlations: Uses in assessing rater reliability.
Shrout, P. E., & Fleiss, J. L. (1979) · Psychological Bulletin · doi:10.1037/0033-2909.86.2.420 · Cited by 24,532
Radiological Assessment of Osteo-Arthrosis
Kellgren, J. H., & Lawrence, J. S. (1957) · Annals of the Rheumatic Diseases · doi:10.1136/ard.16.4.494 · Cited by 12,422
Health Measurement Scales: A Practical Guide to Their Development and Use
Streiner, D. L., Norman, G. R., & Cairney, J. (1989) · Cited by 9,595
Jaeschke, R., Singer, J., & Guyatt, G. H. (1989) · Controlled Clinical Trials · doi:10.1016/0197-2456(89)90005-6 · Cited by 4,982
The Design and Analysis of Clinical Experiments
Fleiss, J. L. (1999) · Wiley eBooks · doi:10.1002/9781118032923 · Cited by 4,819
The Design and Analysis of Clinical Experiments.
Hills, M., & Fleiss, J. L. (1987) · Journal of the Royal Statistical Society. Series A (General) · doi:10.2307/2982050 · Cited by 3,261
Health Measurement Scales--A Practical Guide to Their Development and Use
Waclawski, E. R. (2010) · Occupational Medicine · doi:10.1093/occmed/kqp179 · Cited by 1,874
Binkley, J. M., Stratford, P. W., Lott, S., & Riddle, D. L. (1999) · PubMed · Cited by 1,435
Self-citationNoyes, F. R., Barber, S. D., & Mangine, R. E. (1991) · The American Journal of Sports Medicine · doi:10.1177/036354659101900518 · Cited by 995
Bellamy, N., Kirwan, J., Boers, M., Brooks, P., Strand, V., Tugwell, P., Altman, R. D., Brandt, K. D., Dougados, M., & Lequesne, M. G. (1997) · PubMed · Cited by 745
Cited by
Global Rating of Change Scales: A Review of Strengths and Weaknesses and Considerations for Design
Kamper, S. J., Maher, C. G., & Mackay, G. (2009) · Journal of Manual & Manipulative Therapy · doi:10.1179/jmt.2009.17.3.163 · Cited by 1,458
Martin, R. L., Davenport, T. E., Paulseth, S., Wukich, D. K., & Godges, J. J. (2013) · Journal of Orthopaedic & Sports Physical Therapy · doi:10.2519/jospt.2013.0305 · Cited by 269
Tan, S. H. S., Lau, B. P. H., Khin, L. W., & Lingaraj, K. (2016) · The American Journal of Sports Medicine · doi:10.1177/0363546515573008 · Cited by 190
Nagai, T., Schilaty, N. D., Laskowski, E. R., & Hewett, T. E. (2020) · Knee Surgery, Sports Traumatology, Arthroscopy · doi:10.1007/s00167-019-05513-3 · Cited by 104
Aizawa, J., Hirohata, K., Ohji, S., Ohmi, T., Koga, H., & Yagishita, K. (2020) · Orthopaedic Journal of Sports Medicine · doi:10.1177/2325967120964484 · Cited by 50
Metadata
- Authors
- Reid, A., Birmingham, T. B., Stratford, P. W., Alcock, G. K., & Giffin, J. R.
- Venue
- Physical Therapy
- Publisher
- Oxford University Press (OUP)
- Published
- 2007-03-01
- Volume
- 87
- Issue
- 3
- Pages
- 337-349
- ISSN
- 0031-9023 (ISSN-L)
- 1538-6724
- OpenAlex
- W2157892731
- Cited by
- 718
- References
- 38
- FWCI
- 13.76
- Type
- journal article
- Language
- en
- Open access
- bronze
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Hop Testing Provides a Reliable and Valid Outcome Measure During Rehabilitation After Anterior Cruciate Ligament Reconstruction. https://app.cochat.ai/papers/10.2522/ptj.20060143
- The paper
- Reid, A., Birmingham, T. B., Stratford, P. W., Alcock, G. K., & Giffin, J. R. (2007). Hop Testing Provides a Reliable and Valid Outcome Measure During Rehabilitation After Anterior Cruciate Ligament Reconstruction. Physical Therapy. https://doi.org/10.2522/ptj.20060143
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
