The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.
Quantitative Assessment of Walking Activity after Total Hip or Knee Replacement*
Abstract
Accumulating data suggest that the amount of use, and not simply the duration in situ, influences the wear and survival of total joint replacements. An electronic, digital pedometer was used to record the number of steps taken by 111 non-randomized volunteers who had had at least one total hip or knee replacement. The patients averaged 4988 steps per day, which extrapolates to approximately 0.9 million cycles per year for each joint of the lower extremity. Average activity ranged widely from 395 to 17,718 steps per day, an approximately forty-five-fold difference. The most active patient walked more than 3.5 times the average number of steps per day. Age was significantly associated with activity (p = 0.048), but there was a high degree of variability (standard deviation, 3040 steps per day). Patients who were less than sixty years old walked 30 per cent more on average than those who were sixty years old or more (p = 0.023). Men walked 28 per cent more on average than women (p = 0.037), and men who were less than sixty years old walked 40 per cent more on average than the rest of the patients (p = 0.011). These data indicate that individual differences in the activity of the patient can be a substantial source of variability in rates of polyethylene wear in vivo. The pedometer is an inexpensive investigational tool with many potential applications, including standardizing wear measurements of joint replacements on the basis of gait cycles rather than time. This quantitative approach may provide prognostic information regarding the survival of joint prostheses. Pedometer data may also be useful for quantitative assessment of walking ability in outcome studies.
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
Effect of femoral head size on wear of the polyethylene acetabular component.
Livermore, J., Ilstrup, D., & Morrey, B. (1990) · The Journal of Bone & Joint Surgery · doi:10.2106/00004623-199072040-00008 · Cited by 1,024
Ten-year follow-up study of total hip replacement.
Stauffer, R. N. (1982) · The Journal of Bone & Joint Surgery · doi:10.2106/00004623-198264070-00003 · Cited by 639
SCHMALZRIED, T. P., KWONG, L. M., JASTY, M., SEDLACEK, R. C., HAIRE, T. C., O'CONNOR, D. O., BRAGDON, C. R., KABO, J. M., MALCOLM, A. J., & HARRIS, W. H. (1992) · Clinical Orthopaedics and Related Research · doi:10.1097/00003086-199201000-00009 · Cited by 443
Self-citationMethods to assess physical activity with special reference to motion sensors and accelerometers
Meijer, G. A. L., Westerterp, K. R., Verhoeven, F. M. H., Koper, H. B. M., & ten Hoor, F. (1991) · IEEE Transactions on Biomedical Engineering · doi:10.1109/10.133202 · Cited by 162
Validation of a simple mechanical accelerometer (pedometer) for the estimation of walking activity
Bassey, E. J., Dallosso, H. M., Fentem, P. H., Irving, J. M., & Patrick, J. M. (1987) · European Journal of Applied Physiology · doi:10.1007/bf00690900 · Cited by 91
Walking activities and wear of prostheses.
Seedhom, B. B., & Wallbridge, N. C. (1985) · Annals of the Rheumatic Diseases · doi:10.1136/ard.44.12.838 · Cited by 90
Saris, W. H. M., & BINKHORST, R. A. (1977) · European Journal of Applied Physiology · doi:10.1007/bf00421777 · Cited by 76
The Walking Activity of Patients with Artificial Hip Joints
Wallbridge, N. C., & Dowson, D. (1982) · Engineering in Medicine · doi:10.1243/emed_jour_1982_011_023_02 · Cited by 76
Saris, W. H. M., & BINKHORST, R. A. (1977) · European Journal of Applied Physiology · doi:10.1007/bf00421778 · Cited by 71
Accuracy of Pedometer in Walking and Running
Washburn, R. A., Chin, M.-K., & Montoye, H. J. (1980) · Research Quarterly for Exercise and Sport · doi:10.1080/02701367.1980.10609330 · Cited by 56
Cited by
Assessing activity in joint replacement patients
Zahiri, C. A., Schmalzried, T. P., Szuszczewicz, E. S., & Amstutz, H. C. (1998) · The Journal of Arthroplasty · doi:10.1016/s0883-5403(98)90195-4 · Cited by 914
Self-citationUtility of Pedometers for Assessing Physical Activity: Convergent Validity
Tudor-Locke, C., Williams, J. E., Reis, J. P., & Pluto, D. (2002) · Sports Medicine · doi:10.2165/00007256-200232120-00004 · Cited by 649
Mercer, K., Giangregorio, L., Schneider, E., Chilana, P., Li, M., & Grindrod, K. (2016) · JMIR mHealth and uHealth · doi:10.2196/mhealth.4225 · Cited by 419
Current Concepts Review - Wear in Total Hip and Knee Replacements*
SCHMALZRIED, T. P., & CALLAGHAN, J. J. (1999) · The Journal of Bone & Joint Surgery · doi:10.2106/00004623-199901000-00016 · Cited by 395
Self-citationDuration and frequency of every day activities in total hip patients
Morlock, M., Schneider, E., Bluhm, A., Vollmer, M., Bergmann, G., Müller, V, & Honl, M. (2001) · Journal of Biomechanics · doi:10.1016/s0021-9290(01)00035-5 · Cited by 360
Metadata
- Authors
- SCHMALZRIED, T. P., SZUSZCZEWICZ, E. S., NORTHFIELD, M. R., AKIZUKI, K. H., FRANKEL, R. E., BELCHER, G., & AMSTUTZ, H. C.
- Venue
- The Journal of Bone & Joint Surgery
- Published
- 1998-01
- Volume
- 80
- Issue
- 1
- Pages
- 54-9
- ISSN
- 0021-9355 (ISSN-L)
- OpenAlex
- W4245480758
- Cited by
- 434
- References
- 11
- FWCI
- 14.43
- Type
- journal article
- Language
- en
- Open access
- closed
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: Quantitative Assessment of Walking Activity after Total Hip or Knee Replacement*. https://app.cochat.ai/papers/10.2106/00004623-199801000-00010
- The paper
- SCHMALZRIED, T. P., SZUSZCZEWICZ, E. S., NORTHFIELD, M. R., AKIZUKI, K. H., FRANKEL, R. E., BELCHER, G., & AMSTUTZ, H. C. (1998). Quantitative Assessment of Walking Activity after Total Hip or Knee Replacement*. The Journal of Bone & Joint Surgery. https://doi.org/10.2106/00004623-199801000-00010
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.
