Biomedical subjects

Anne-Maree Keenan

Publications and source records attributed to Anne-Maree Keenan.

14 recordsLinked to original sources

PubMed2007

The Foot Posture Index: Rasch analysis of a novel, foot-specific outcome measure.

OBJECTIVE: To investigate the internal construct validity of a clinician-assessed measure of foot position, the Foot Posture Index (FPI), versions FPI-8 and FPI-6. DESIGN: Rasch analysis of baseline FPI scores from studies conducted during the development of the instrument. SETTING: A community-based and a hospital-based study, conducted at 2 institutions. PARTICIPANTS: Measures were obtained from 143 participants (98 men, 45 women; age range, 8-65y). INTERVENTIONS: Not applicable. MAIN OUTCOME MEASURES: Rasch analysis was undertaken using RUMM2020 software in order to evaluate the following properties of the FPI: unidimensionality of each item included in the FPI, the differential item functioning (DIF) of each item, and item and person separation indices. RESULTS: In the developmental draft of the instrument, the 8-item FPI-8 showed some misfit to the Rasch model (chi(16)(2) test=27.63, P=.03), indicating lack of unidimensionality. Two items were identified as problematic in the Rasch modeling: Achilles' tendon insertion (Helbing's sign), which showed illogical response ordering and "congruence of the lateral border of the foot," which showed misfit, indicating that this item may be measuring a different construct (chi(2)(2) test=15.35, P<.01). All FPI-8 items showed an absence of DIF, and the person separation index (PSI) was good (PSI=.88). The revised FPI-6, which does not include the 2 problematic items, showed unidimensionality (chi(12)(2) test=11.49, P=.49), indicating a good overall fit to the model, and improvement over the preliminary version. With the removal of the 2 problematic items, there were no disordered thresholds; all items remained DIF free and all individual items displayed a good fit to the model. The person-separation index for the FPI was similar for both the 8-item (FPI-8=.880) and 6-item (FPI-6=.884) versions. CONCLUSIONS: The original FPI-8 showed significant mismatching to the model. The 2 items in the FPI-8 that were identified as problematic in clinical validation studies were also found to be contributing to the lack of fit to the Rasch model. The finalized 6-item instrument showed good metric properties, including good individual item fit and good overall fit to the model, along with a lack of differential item functioning. This analysis provides further evidence for the validity of the FPI-6 as a clinical instrument for use in screening studies and shows that it has the potential to be analyzed using parametric strategies.

Adolescent↗

PubMed2006

Impact of multiple joint problems on daily living tasks in people in the community over age fifty-five.

OBJECTIVE: To establish the prevalence of multiple joint problems and their impact on everyday tasks. METHODS: A random sample of the UK population was assessed using a postal questionnaire. Data on overall joint pain, swelling and stiffness, and activities of daily living were obtained from 16,222 individuals >55 years of age (86% response rate). Prevalence estimates of joint problems were established and the impact of multiple joint pathologies on common physical tasks was determined. RESULTS: Single joint involvement was unusual (median joint involvement 4). Although the knee was the most frequently involved joint (220.30 per 1,000), isolated knee pathology accounted for only 1 in 11 patients with knee pain. Although single joint disorders increased the risk of experiencing functional difficulty, this risk was substantially increased with multiple joint problems: individuals with knee and feet problems were 14 times more likely to experience difficulty standing and walking than those without knee problems (odds ratio [OR] 14.50); knee and hip problems increased the risk >12 times (OR 12.43) whereas knee, back, feet, and hip involvement increased the risk 60 times (OR 62.41). CONCLUSION: Multiple-site joint problems are much more common than single joint problems. Although individual joint problems have a considerable impact on a person's functional ability, this risk is substantially increased when other joints are involved. With the increasing burden associated with the aging population, it is essential that the management of joint pain be considered in light of the impact of multiple, rather than single, joint problems.

Activities of Daily Living↗

PubMed2006

Effectiveness of foot orthoses to treat plantar fasciitis: a randomized trial.

BACKGROUND: Plantar fasciitis is one of the most common foot complaints. It is often treated with foot orthoses; however, studies of the effects of orthoses are generally of poor quality, and to our knowledge, no trials have investigated long-term effectiveness. The aim of this trial was to evaluate the short- and long-term effectiveness of foot orthoses in the treatment of plantar fasciitis. METHODS: A pragmatic, participant-blinded, randomized trial was conducted from April 1999 to July 2001. The duration of follow-up for each participant was 12 months. One hundred and thirty-five participants with plantar fasciitis from the local community were recruited to a university-based clinic and were randomly allocated to receive a sham orthosis (soft, thin foam), a prefabricated orthosis (firm foam), or a customized orthosis (semirigid plastic). RESULTS: After 3 months of treatment, estimates of effects on pain and function favored the prefabricated and customized orthoses over the sham orthoses, although only the effects on function were statistically significant. Compared with sham orthoses, the mean pain score (scale, 0-100) was 8.7 points better for the prefabricated orthoses (95% confidence interval, -0.1 to 17.6; P = .05) and 7.4 points better for the customized orthoses (95% confidence interval, -1.4 to 16.2; P = .10). Compared with sham orthoses, the mean function score (scale, 0-100) was 8.4 points better for the prefabricated orthoses (95% confidence interval, 1.0-15.8; P = .03) and 7.5 points better for the customized orthoses (95% confidence interval, 0.3-14.7; P = .04). There were no significant effects on primary outcomes at the 12-month review. CONCLUSIONS: Foot orthoses produce small short-term benefits in function and may also produce small reductions in pain for people with plantar fasciitis, but they do not have long-term beneficial effects compared with a sham device. The customized and prefabricated orthoses used in this trial have similar effectiveness in the treatment of plantar fasciitis.

Equipment Design↗

PubMed2006

Quantifying peri-meniscal synovitis and its relationship to meniscal pathology in osteoarthritis of the knee.

The objectives of this study were to validate a semiquantitative scoring system for estimating perimeniscal synovitis in osteoarthritic (OA) knees and to examine the relationship between the extent of synovitis and the degree of meniscal pathology using gadolinium-enhanced magnetic resonance imaging (MRI). Forty-three subjects with clinically diagnosed OA knee were assessed for peri-meniscal synovitis using gadolinium-enhanced MRI. Quantitative measurements of synovitis were made by summing areas in consecutive slices within generated regions of interest, and the synovitis was also scored semi-quantitatively using a 0-3 scale. Meniscal pathology (extrusion, degeneration and tearing) was also scored semiquantitatively. Establishment of a correlative relationship was undertaken using Spearman's rho (rho). A total of 86 sites were assessed. The semi-quantitative synovitis score correlated well with the quantitative synovitis score (rho>0.9). A moderate association between medial meniscal extrusion and synovitis was demonstrated (rho=0.762, P<0.000), although this association was not as strong in the lateral compartment (rho=0.524, P<0..000). The results suggest the semiquantitative scoring system is valid for assessing perimeniscal synovitis. The relationship between meniscal pathology and adjacent synovitis requires further study.

Aged↗

PubMed2006

Clinicians' assessment of the hindfoot: a study of reliability.

BACKGROUND: Static measurements of position of the hindfoot and clinical assessment of motion of the hindfoot often are used in the assessment of foot function and manufacturing of orthoses. However, the reliability and validity of static measurements and dynamic observation and assessment of the hindfoot are controversial. The purpose of this investigation was to examine reliability of static and dynamic assessments of the hindfoot in a setting that reproduced clinical conditions. METHODS: Twenty-four healthy participants were evaluated by four experienced clinicians for four commonly used static measurements and dynamic assessment of hindfoot function. The protocol was repeated 2 weeks later. RESULTS: Results indicated that reliability of results, both intertester and from test to test were poor to fair for static measurements of the hindfoot (r = 0.075 to r = 0.755, p < 0.05). The error estimates associated with these measures were high; subtalar neutral position and resting calcaneal stance position both demonstrated measurement errors of more than 4 degrees (95% confidence intervals-4.1 degrees and 5.1 degrees, respectively). Retest reliability of dynamic assessments were considered reasonable for only one clinician (kappa = 0.55). Intertester agreement was poor among all clinicians. CONCLUSION: Clinicians taking static measurements demonstrated large errors that do not reflect the precision that has been assumed in clinical theory using these measurements. The availability of static assessments did not improve dynamic assessment. This poor reliability calls into question the importance placed on static and dynamic measurements of the hindfoot in clinical decision-making.

Ankle↗

PubMed2004

Effects of experimentally induced plantar insensitivity on forces and pressures under the foot during normal walking.

Pressures under the foot during level walking were measured in 15 healthy young adults (8 females, 7 males, mean age 25.7, S.D. 5.3) before and after immersing the feet in ice-cold water (2 degrees C) for 30 min to evaluate the role of plantar insensitivity on gait patterns. Following ice water immersion, there was a significant decrease in walking speed. Maximum forces and peak pressures under the foot decreased, with the exception of an increase in loading under the third to fifth metatarsal heads. Contact times increased under all regions of the foot, and force-time and pressure-time integrals increased under the second and third to fifth metatarsal head regions. It is concluded that plantar insensitivity significantly alters the distribution, duration, and to a lesser extent, the magnitude of forces and pressures under the foot when walking. These results suggest that in the neuropathic foot, gait changes caused by plantar insensitivity may be partly responsible for the redistribution and altered duration of loading, whereas the increase in the magnitude of forces and pressures are primarily due to other disease-related factors.

Adult↗

PubMed2003

Factors associated with triathlon-related overuse injuries.

STUDY DESIGN: Descriptive correlational investigation. OBJECTIVES: To assess the incidence of, and potential risk factors associated with, overuse injury in triathlon. BACKGROUND: The sport of triathlon is rapidly increasing in popularity with a concomitant rise in the prevalence of injuries sustained by triathletes. METHODS AND MEASURES: The training and injury patterns of 131 triathletes were surveyed over a 10-week prospective period during the triathlon competition season. A complementary retrospective 6-month analysis of training history and prior overuse injuries was conducted. RESULTS: Fifty percent of triathletes sustained an injury in the 6-month preseason at an injury exposure rate of 2.5 per 1000 training hours. Thirty-seven percent were injured during the 10-week competition season at an injury exposure rate of 4.6 per 1000 training hours. Overuse accounted for 68% of preseason and 78% of competition season injuries reported. Increased years of triathlon experience, high running mileage, history of previous injury, and inadequate warming-up and cooling-down regimes appeared to have individual associations with injury incidence. When interactions were included in a multiple logistic regression model, increasing years of triathlon experience was the most significant predictor of preseason injury risk and a previous history of injury and high preseason running mileage increased the risk of injury during the competition season. CONCLUSIONS: The results indicate that in assessing triathletes, a full training and competition history is required by the sports clinician for a comprehensive assessment of the factors that may contribute to overuse injury.

Adult↗

PubMed2002

An evaluation of two foot-specific, health-related quality-of-life measuring instruments.

In the past decade, health-related quality-of-life (HRQoL) assessment has become an important tool to measure change as a result of treatment in clinical trials. The aim of this project was to compare and contrast two foot-specific HRQoL questionnaires: the Foot Function Index (FFI) and the Foot Health Status Questionnaire (FHSQ). To assist in this process, a quasi-experimental trial was performed to evaluate the effectiveness of foot orthoses in improving HRQoL in people suffering from plantar fasciitis. The results from this study found that the FFI is generally less responsive to change, particularly in the domain of Activity Limitation. Nevertheless, significant improvements were found for two out of the three domains (Pain and Disability, but not Activity Limitation) for the FFI, as well as the overall score of FFI. In contrast, all four domains (Pain, Function, Footwear and General Foot Health) of the FHSQ showed significant improvement. Our experience with the questionnaires also revealed that certain questions in the Activity Limitation domain of the FFI can lead to inconsistent scoring, thus casting doubts over the suitability of this domain for use with patients with plantar fasciitis. Therefore, the FHSQ has several advantages when evaluating HRQoL in patients being treated with foot orthoses for plantar fasciitis, and should be viewed as the preferred questionnaire.

Fasciitis↗

PubMed2002

Integrating research into the clinic. What evidence based practice means to the practising podiatrist.

This paper is the first in a series of three aimed at introducing clinicians to current concepts in research, and outlining how they may be able to apply these concepts to their own clinical practice. It has become evident in recent years that while many practitioners may not want to become actively involved in the research process, simply keeping abreast of the burgeoning publication base will create new demands on their time, and will often require the acquisition of new skills. This series introduces the philosophies of integrating what sometimes may appear to be abstract research into the realities of the clinical environment. It will provide practitioners with an accessible summary of the tools required in order to understand the research process. For some, it is hoped this series may provide some impetus for the contemplative practitioner to become a more active participant in the research process. This first paper addresses how the evidence based practice (EBP) revolution can be used to empower the individual practitioner and how good quality evidence can improve the overall clinical decision making process. It also suggests key strategies by which the clinician may try to enhance their clinical decision making process and make research evidence more applicable to their day to day clinical practice.

Clinical Competence↗

PubMed2002

'Horses for Courses': the differences between quantitative and qualitative approaches to research.

Some clinicians may feel dissociated from, and intimidated by the ever-increasing emphasis on research. However, with an understanding of some of the basic principles and key terms, research can feel less daunting. It is the aim of this article, the second in a series of three focusing on understanding research, to introduce clinicians to the different approaches to research, to improve understanding of what the approaches mean, and to highlight when a particular approach may be appropriate. Furthermore, the article will provide an explanation of some of the common terms used within clinical research. This should aid the clinician in applying good, simple, scientific principles to evaluating clinical research evidence.

Evaluation Studies as Topic↗

PubMed2002

Understanding statistics. Putting p-values into perspective.

Understanding statistics can be one of the more difficult and daunting tasks facing the clinician attempting to understand and use the research literature. While the fundamental aim of including statistics in literature is to justify the conclusions and to enhance the information presented, all too often, statistics serve only to intimidate and alienate clinicians. There are two sources for this barrier to understanding: poor comprehension of statistics by clinicians, and inappropriate presentation of statistics by researchers. In the third of our papers on evidence-based practice and the clinician, some basic principles of statistics are introduced. Aspects such as the concepts of clinical and statistical significance are discussed, and an outline of the appropriate use of specific statistics is provided. The hope is that this will enable the clinician to better judge the applicability of statistical techniques as applied in the published literature. Some of the newer, more 'clinician friendly' statistical approaches are also presented. Finally some of the cheats and shortcuts commonly encountered in the presentation of research are discussed, and the methods for dealing with them are outlined.

Humans↗

PubMedDate not supplied

Effectiveness of different types of foot orthoses for the treatment of plantar fasciitis.

Clinicians often use foot orthoses to manage the symptoms of plantar fasciitis. Although there has been considerable research evaluating the effectiveness of orthoses for this condition, there is still a lack of scientific evidence that is of suitable quality to fully inform clinical practice. Randomized controlled trials are recognized as the "gold standard" when evaluating the effectiveness of treatments. We discuss why randomized controlled trials are so important, the features of a well-conducted randomized controlled trial, and some of the problems that arise when trial design is not sound. We then evaluate the available evidence for the use of foot orthoses, with particular focus on published randomized controlled trials. From the evidence to date, it seems that foot orthoses do have a role in the management of plantar fasciitis and that prefabricated orthoses are a worthwhile initial management strategy. At this time, however, it is not possible to recommend either prefabricated or customized orthoses as being better, and it cannot be inferred that customized orthoses are more effective over time and therefore have a cost advantage. Additional good-quality randomized controlled trials are needed to answer these questions.

Evidence-Based Medicine↗

PubMedDate not supplied

Foot type and overuse injury in triathletes.

Abnormal foot morphology has been suggested to contribute to overuse injuries in athletes. This study investigated the relationship between foot type and injury incidence in a large sample of competitive triathletes not wearing foot orthoses during a 6-month retrospective analysis and a 10-week prospective cohort study. Foot alignment was measured using the Foot Posture Index and the Valgus Index, and participants were assigned to supinated, pronated, and normal foot-type groups. Overall, 131 triathletes sustained 155 injuries during the study. Generally, foot type was not a major risk factor for injury; however, there was a fourfold increased risk of overuse injury during the competition season in athletes with a supinated foot type. The results of this study show that triathletes with a supinated foot type are more likely to sustain an overuse injury.

Adolescent↗

PubMedDate not supplied

Effectiveness of low-Dye taping for the short-term management of plantar fasciitis.

Low-Dye taping is often used as a short-term treatment for plantar fasciitis. We evaluated the short-term effectiveness of low-Dye taping in relieving pain associated with plantar fasciitis. In this comparative study conducted at a university-based clinic, 65 participants with plantar fasciitis who received low-Dye taping for 3 to 5 days were compared with 40 participants who did not receive taping. Pain before and after treatment was measured using a visual analog pain scale. Analysis of the data was by the intention-to-treat principle, and a linear regression approach to analysis of covariance was used to compare effects. The visual analog pain scale score improved by a mean of 20 mm (from 44 to 24 mm) in the taping group and worsened by a mean of 6 mm (from 51 to 57 mm) in the control group. The analysis of covariance-adjusted difference in therapeutic effect favored the taping group by 31.7 mm (95% confidence interval, 23.6-39.9 mm) and was statistically significant (t = 7.71). In the short term, low-Dye taping significantly reduces the pain associated with plantar fasciitis. These findings are the first quantitative results to demonstrate the significant therapeutic effect of this treatment modality in relieving the symptoms associated with plantar fasciitis.

Bandages↗