Foot problems in a group of patients with rheumatoid arthritis: an unmet need for foot care

Assessment of rheumatoid arthritis patients' knowledge about foot problems related to their illness and foot care practice

INTRODUCTION

Foot problems are very common in rheumatoid arthritis (RA). Podiatric intervention through therapeutic education of RA patients on the different potential foot problems could improve patients' knowledge and management of their foot problems. This study aimed to evaluate the knowledge of RA patients on podiatric problems related to their illness and foot care practices.

METHODS

This was a cross-sectional study including patients diagnosed with RA and aged older than 18 years. Sociodemographic data, disease characteristics, and therapeutic data were collected. RA foot problems knowledge and foot care practice were assessed using a questionnaire combining questions developed from the literature search and a pretested validated questionnaire.

RESULTS

Overall, 103 patients were included of whom 94 were female. The mean age was 56 years (±10 years) and the mean disease duration was 15 years (±10 years). Over 77% of patients reported never having received foot-health-related education. With regard to their knowledge about RA foot involvement, patients were aware that RA can affect the feet similarly to the hands (83%), lead to deformation of the foot (86%), lead to walking difficulties and falling (68%), and produce skin lesions of the foot (31%). Regarding participant's knowledge of appropriate footwear, 65% agreed that it would be beneficial to wear quality standard sports shoes. However, less than one-third of patients know the podiatrist's skills.

CONCLUSION

Our study showed an awareness of the repercussions of RA on feet but a lack of knowledge on proper foot care, thus identifying a need for foot health therapeutic education.

Differences and Similarities in the Feet of Metatarsalgia Patients with and without Rheumatoid Arthritis in Remission

Objectives: Metatarsalgia continues to be a problem in patients with rheumatoid arthritis (RA) in remission (remRA), as well as in the non-rheumatic population, with a mechanical origin. Identify and compare clinical, morphological, disability, synovitis (ultrasound), and radiological osteoarticular damage characteristics in two groups of patients with lesser-ray metar-tarsalgia, with remRA, and without RA. Methods: Cross-sectional study with 84 patients with remRA (mRA) and 60 patients without RA (nmRA). The study evaluated five clinical variables (pain, Foot Function Index (FFI), joint mobility, digital deformities, and foot type), a radiological variable (osteoarticular damage), and an ultrasound variable (metatarsal synovitis). The data were analysed using descriptive and correlational techniques. Results: There were no significant differences in sex, age, body mass index (BMI), or degree of pain. Both groups showed a high prevalence of limited joint mobility for the ankle and first metatarsal phalanx (DF1st MTPJ) and digital deformities, with no statistically significant differences. Similarly, there were no differences in lesser-ray synovitis. On the other hand, there were differences in mRA with greater disability and activity limitation (FFI), LDD (lesser-ray digital deformities) stiffness, first-ray deformities, radiological damage, synovitis in 1st MTPJ, and positive Doppler (five patients). Conclusions: Metatarsalgia presents similarities in both populations. Biomechanical factors may influence the symptoms and presence of synovitis in patients with RA in remission. Other characteristics are more frequent in mRA, which could be related to the disease; thus, future research should include both biomechanical and ultrasound exploration of the foot in the valuation of patients in remission.

Impact of ankylosing spondylitis on foot health and quality of life: an observational case-control study

Background

Ankylosing spondylitis (AS) is a chronic, inflammatory, and autoimmune disease. This condition primarily affects the axial skeleton and presents direct foot involvement, such as Achilles enthesitis or plantar fascia involvement.

Objective

This study aimed to investigate the impact of foot health on the quality of life of individuals with AS compared to a control group without AS.

Materials and methods

A sample of 112 subjects was recruited, with a mean age of 46.80 ± 10.49 years, divided into two groups: 56 individuals with AS (cases) and 56 individuals without AS (controls). Demographic data were collected, and the scores obtained in the Foot Health Status Questionnaire domains were recorded.

Results

Of the participants, 27.79% (N = 30) were men and 73.21% (N = 82) were women. The mean age in the group was 46.80 ± 10.49. Significant differences (p < 0.05) were found in the domains of foot function, foot pain, footwear, overall foot health, general health-related physical activity, and social capacity between the AS group and the control group.

Conclusion

Individuals with AS exhibited a decreased quality of life, as indicated by their Foot Health Status Questionnaire scores.

Ultrasound imaging of the dorsalis pedis artery as an early indicator of the precursory changes for rheumatoid vasculitis: A case series

Introduction

Clinical verification of rheumatoid vasculitis (RV) persists as a mid-to-late diagnosis with medical imaging or biopsy. Early and subclinical presentations of RV, in particular, can remain underdiagnosed in the absence of adequate diagnostic testing. In this study, the research demonstrated the precursory changes for RV in patients with rheumatoid arthritis (RA) using non-invasive ultrasound imaging of a peripheral vessel.

Method

Six participants were recruited: three participants with (RA) and three age- and gender-matched healthy controls. All participants completed a Foot Health Survey Questionnaire (FHSQ), and participants with RA completed a Rheumatoid Arthritis Disease Activity Index-5 (RADAI-5). Bilateral B-mode and Doppler ultrasound of the dorsalis pedis artery (DPA) was performed. The degree of inflammation, lumen and artery diameters, lumen diameter-to-artery diameter ratio and peak systolic velocity in the proximal DPA were compared between the two groups.

Results

The mean RADAI-5 score (5.4 ± 0.8 out of 10) indicated moderate disease activity amongst participants with RA. Inflammation was observed in the DPA wall in all participants with RA, compared to no inflammation observed in the control group (Friedmans two-way analysis: χ2 = 15.733, P = 0.003). Differences between groups for inflammation, lumen diameter and lumen diameter-to-artery diameter ratio were found (P < 0.034), without differences for artery diameter and peak systolic velocity (P > 0.605). DPA wall inflammation did not correlate with FHSQ scores (r = -0.770, P = 0.073).

Conclusion

Despite moderate RA disease activity, this is the first study to demonstrate the use of ultrasound to observe inflammation in small vessel disease. Our findings suggest ultrasound imaging may be a viable screening tool to demonstrate arterial wall inflammation, indicating the precursory changes of RV.

Preoperative patient's expectations and clinical outcomes after rheumatoid forefoot deformity reconstruction by joint sacrificing surgery

Objective

To study the clinical and radiologic factors related with overall patient satisfaction of joint scarifying reconstruction on severe rheumatoid forefoot deformity (RFD).

Methods

Forty cases of RFD were retrospectively enrolled. A questionnaire on the factors for patient's expectations and satisfactions of the greater and lesser toes was administered, including repression of relapse in deformity (D), pain reduction (P), improvement in shoe wearing (S), barefoot activity (B), and appearance (A). Overall satisfaction were assessed using the 5-digit-scale. Hallux valgus angle, 1, 2 intermetatarsal angle, and other radiologic parameters were measured. Pearson's correlation and multiple linear regression analyses were used to evaluate the relationships between these factors and overall satisfaction.

Results

Overall satisfaction was 4.0±0.82. Postoperative radiologic parameters were corrected in adequate range. Visual analog scale (VAS) was reduced from 7.2±2.1 to 2.2±1.8. For the greater toe, patient's expectations (D, P, S, B, and A) were 4.2, 4.1, 3.0, 2.5, 2.7 and satisfactions were 4.2, 4.0, 3.4, 3.5, 3.3, respectively. For the lesser toes, patient's expectations (D, P, S, B, and A) were 3.9, 4.1, 3.4, 3.0, 2.8, and satisfactions were 3.4, 4.0, 3.4, 3.6, 2.9, respectively. Satisfactions with P and B, and reduction amounts of VAS were significantly correlated with overall satisfaction.

Conclusion

Although forefoot reconstruction with a joint sacrificing procedure is non-physiological, it could be a good surgical option for severe RFD. Each patient's expectations and satisfactions with this procedure could vary. Thus, it seems important to inform patients preoperatively that expectation could be fulfilled well or less.

Radiographic factors associated with painful callosities after forefoot surgery in patients with rheumatoid arthritis

OBJECTIVES

Operative procedures for rheumatoid forefoot deformities have gradually changed from arthrodesis or resection arthroplasty to joint-preserving surgery. Although joint-preserving arthroplasty has yielded good outcomes, painful plantar callosities may occur post-operatively. This study aimed to reveal the radiographic factors associated with painful callosities after joint-preserving surgery for forefoot deformities in patients with rheumatoid arthritis (RA).

METHODS

We retrospectively evaluated 166 feet in 133 patients with RA who underwent forefoot joint-preserving arthroplasty, including proximal rotational closing-wedge osteotomies of the first metatarsal, between January 2012 and December 2015. Logistic regression analysis was performed with the objective variable set as the presence/absence of painful plantar callosities at the final observation and the explanatory variables set as several radiographic factors, including post-operative relative first metatarsal length (RML), amount of dorsal dislocation of the fifth metatarsal (5DD), and arc failure of the lesser toes.

RESULTS

At the final follow-up, 42 of the 166 feet (25.3%) had painful callosities under the metatarsal heads post-operatively. Logistic regression analysis showed that the RML, 5DD, and lesser toes' arc failure were significantly associated with painful callosities.

CONCLUSIONS

We identified that RML, 5DD, and arc failure of the lesser toes were associated with painful plantar callosities after the surgery.

Static Foot Disturbances and the Quality of Life of Older Person with Rheumatoid Arthritis

Disturbed static foot function is one of the main causes of impaired quality of life, which may be related to the frailty syndrome of older adult patients with Rheumatoid Arthitis (RA). The aim of the study was to evaluate the relationship between parameters of static foot function disturbances and quality of life of older adult patients with RA. The study was performed among 102 patients with RA diagnosed according to the American College of Rheumatology (ACR) and EULAR 2010 criteria. Patients were divided into four subgroups depending on radiological evaluation according to the Steinbrocker classification. Plantoconturography examination was conducted using a podoscope with a 3D scanner and software for computer foot examination CQ ST2K. Quality of life of patients with RA was evaluated using the Arthritis Impact Measurement Scales-2 (AIMS-2). A statistically significant relationship between AIMS-2 and parameters of static foot function disturbances was observed. The study revealed correlations between parameters of disturbed static foot function and RA severity in comparison to disease duration. Our results indicate a relationship between static foot function disturbances and quality of life of patients with RA, not only in the area of physical activity, but also in the social an emotional domain. Study results indicate that plantoconturography and assessment of quality of life using AIMS-2 could be useful as a diagnostic and prognostic tool in RA.

Pedobarographic Measurements of Rheumatoid Feet Compared with Clinical Parameters

Objective:

This study aimed to investigate the relationship between plantar pressure pedobarographic measurements and disease activity, radiological abnormalities, and foot indexes in patients with rheumatoid arthritis (RA).

Methods:

Sociodemographics, foot symptoms, anatomical distribution, pain intensity and duration, and podiatry services access data were collected. Disease activity scale of 28 joints (DAS28) was used for the disease activity, and Health Assessment Questionnaire (HAQ) was used for the functional status. Foot function index (FFI) was used to measure the impact of foot pathology on its function. The Modified Larsen scoring was used to assess radiological abnormalities. Pedobarographic measurements were used to analyze foot loading characteristics.

Results:

A total of 104 feet of 52 patients with RA was evaluated. DAS28 scores did not correlate with the plantar pressure values (p>0.05). A significant correlation was found between HAQ scores and right medial midfoot loading pressure (r=0.355; p<0.01). FFI scores were positively correlated with right lateral midfoot loading pressure (r=0.302; p<0.05). No relationship was found between Manchester Foot Pain and Disability Index and plantar loading characteristics. The radiological scores were correlated with left lateral hindfoot plantar pressure (r=0.286; p<0.05).

Conclusions:

Pedobarographic measurements can be considered as a follow-up evaluation tool for the evaluation of all foot parts (forefoot, midfoot, and hindfoot). Rheumatoid feet investigation showed that foot involvement is independent of the disease duration, whereas midfoot plantar pressures are associated with the body mass index. Additionally, DAS28 may fall short as a marker of disease activity because it neglects foot problems.

The effect of pre-fabricated insole on plantar pressure distribution in patients with rheumatoid arthritis

BACKGROUND

Foot deformities result in pain and changes in plantar pressure distribution in rheumatoid arthritis (RA) patients. Medical insoles are commonly prescribed for declining pain and modifying foot pressure distribution in these patients. The purpose of this study was to evaluate the effect of a pre-fabricated insole with metatarsal pad and medial longitudinal arch support on plantar pressure distribution in rheumatoid arthritis patients.

METHODS

Fifteen females with RA participated in this study. All patients received a pair of pre-fabricated insoles that were individually modified using metatarsal pads and medial longitudinal arch supports. Mean peak pressure (kPa), maximum force (N), and contact area (cm²) were calculated for the heel, midfoot, metatarsophalangeal joint, and toe regions using the Pedar-X system immediately and after a month follow-up.

FINDINGS

In the heel and metatarsophalangeal joint regions, maximum pressure and force showed a significant reduction in the follow-up assessment (p < 0.05). The comparison showed a significant increase in maximum pressure and force in the midfoot when participants walked with insole compared to without insole condition (p < 0.001).

INTERPRETATION

Using a pre-fabricated insole with an individually modified metatarsal pad and medial longitudinal arch support could alter rheumatoid arthritis patients' plantar pressures after one month of follow-up. This type of insole is simple and inexpensive and showed a significant effect on decreasing pressures under the metatarsal heads.

Reporting of Research Ethics in Studies Focusing on Foot Health in Patients with Rheumatoid Arthritis - A Systematic Review

Research ethics is a fundamental part of the entire research. Patients with rheumatoid arthritis are sensitive group of research participants because their long-term health problems cause significant changes in their foot health. In foot health research, data are usually collected through a clinical assessment of the foot or questionnaires. However, there is limited evidence of the reported research ethics of empirical studies on foot health in patients with rheumatoid arthritis. Therefore this review aimed to analyze the reported research ethics of peer-reviewed empirical studies focusing on foot health in patients with rheumatoid arthritis as research participants. This systematic review used the Medline/PubMed, CINAHL, and Embase databases. A total of 1,653 records were identified, and 32 articles were included in the final analysis. Reporting research ethics in studies of patients with rheumatoid arthritis is fragmented, focusing predominantly on ethical approval and informed consent and lacking a broader discussion about research ethics.

Foot and Ankle Problems in Patients With Rheumatoid Arthritis in 2019: Still an Important Issue

Objective

To study the prevalence of foot pain in patients with rheumatoid arthritis (RA) and whether including a 12‐joint foot count in addition to the 28‐joint count (from the Disease Activity Score 28 [DAS28]) improved detection of foot or ankle pain. In addition, the association between the self‐reported foot and ankle score (SEFAS), patient‐reported function, and disease‐specific factors was studied.

Methods

Physician‐reported data (swollen/tender 12‐joint foot count, DAS28, and medication) and patient‐reported data (foot/ankle pain, physical function, global health, and SEFAS) were assessed during a clinical visit. Data were analyzed with t test, χ² tests, and regression analysis.

Results

A total of 320 patients with RA were included (mean age 63 years, SD 13 years; 73% women), of whom 69% reported foot or ankle pain. Patients who reported foot or ankle pain had a lower mean age and worse disease activity, general pain, function, and global health (P ≤ 0.016), and fewer were in remission (50% versus 75%; P < 0.001) compared with patients without foot pain. The 12‐joint foot count identified 3.2% and 9.5% additional patients with swollen and tender joints, respectively, compared with the 28‐joint count. The SEFAS was associated with walking problems (β = −2.733; 95% confidence interval [CI] = −3.963 to −1.503) and worse function (β = −3.634; 95% CI = −5.681 to −1.587) but not with joint inflammation severity.

Conclusion

The prevalence of foot or ankle pain in patients with RA is high. The 12‐joint foot count had minor effects on detecting patients with foot pain. However, the SEFAS contributed additional information on foot problems that was not identified by joint examinations alone.

Falls in Rheumatoid Patients: Does Ankle and Foot Ultrasonography have a Predictive Role? A Single-blind Study

Background Rheumatoid arthritis (RA) patients have a higher prevalence of falls compared with the healthy population. Several risk factors of falls in RA have been postulated, including high disease activity, low balance, muscle weakness and non-treatment with biologics.

Aim of the work We investigated our hypothesis that the sonographically detected ankle and foot changes in RA patients can predict falls in this population. To our knowledge, no previous study had investigated this before.

Methods In a total of 101 RA patients, we performed assessments of disease activity, disability level, gait speed, balance status, clinical examination of ankle and foot and an MSUS assessment of the ankle and foot joints and tendons as possible risk factors of falls.

Results The Berg balance test had the highest fall-predicting power (71.3%), followed by a gait speed test and restricted range of motion (ROM) of the Rt. subtalar joint, each with a predictive power of 70.3%. Of the sonographic findings, erosion of the first metatarsophalangeal (MTP) joint was the most accurate fall predictor, followed by erosion of the talonavicular joint and tenosynovitis of the ankle dorsal flexors with an area under the curve of 0.656, 0.642 and 0.614, respectively.

Conclusion The use of the MSUS as an adjunct objective method for predicting falls in RA patients has not been studied before. It was found that clinical foot and balance testing was a superior and easier way of predicting falls in RA patients than using ultrasonography.

Relationship Between Pain and Sedentary Behavior in Rheumatoid Arthritis Patients: A Cross-Sectional Study

OBJECTIVE

Despite the known benefits of physical activity, high numbers of individuals with rheumatoid arthritis (RA) remain physically inactive and sedentary. Little is known about the determinants of sedentary behavior (SB) in RA. This cross-sectional study was undertaken to examine a range of pain characteristics and RA-related symptoms and their relationship with objectively measured SB.

METHODS

In total, 76 adults with RA wore an activPAL4 accelerometer (PAL Technologies) over a 7-day period. Pain characteristics (pain intensity, painful joint count, nonarticular pain), fatigue, sleep, depression, anxiety, and disease activity were assessed. Analyses were first conducted to evaluate correlations with sedentary time. The independent contribution of pain characteristics to variation in SB was analyzed with multivariable linear regression (adjusted for demographic data and disease activity).

RESULTS

Participants with valid accelerometer data (n = 72) spent a mean ± SD of 533.7 ± 100.1 minutes/day in SB. Positive associations with daily SB were found for pain intensity (r = 0.31, P < 0.01) and number of painful joints (r = 0.24, P < 0.05) but not nonarticular pain. In multivariable analyses, pain characteristics were not independently associated with SB. Analyses indicated that disease activity had an indirect association with SB mediated by pain intensity. Other correlates of daily SB included anxiety and depression but not fatigue or sleep.

CONCLUSION

Results suggest that while pain and other RA-related factors do play a role in SB, they do not appear to have a significant influence after accounting for other variables. Future research should investigate SB and the role of factors unrelated to the symptoms of RA.

Rheumatoid Arthritis and Tenosynovitis at the Metatarsophalangeal Joints: An Anatomic and MRI Study of the Forefoot Tendon Sheaths

Background Although tenosynovitis in the hands is associated with rheumatoid arthritis (RA), it is unknown whether tenosynovitis of the forefoot is associated with RA. Purpose To determine the anatomy of tendon sheaths of the forefoot and the relationship between MRI-detected tenosynovitis at metatarsophalangeal (MTP) joints and RA. Materials and Methods Fourteen forefeet of donated bodies were examined at flexor tendons and extensor tendons for the presence and course of tendon sheaths. In the prospective study between June 2013 and March 2016, newly presenting patients with RA, patients with other early arthritides, and healthy control participants all underwent MRI of unilateral MTP joints 1-5. MRI studies were scored by two independent readers for tenosynovitis, synovitis, and bone marrow edema. The association between the presence of these features and RA was examined by using logistic regression. Results Macroscopically, all extensor and flexor tendons crossing MTP joints demonstrated sheaths surrounding tendons. Microscopically, a synovial sheath was present. MRI evaluation was performed in 634 participants: 157 newly presenting patients with RA (109 women; mean age, 59 years ± 11 [standard deviation]), 284 patients with other early arthritides (158 women; mean age, 56 years ± 17), and 193 healthy control participants (136 women; mean age, 50 years ± 16). MRI-detected tenosynovitis was associated with RA, both when compared with patients with other arthritides (odds ratio [OR], 2.5; 95% confidence interval [CI]: 1.7, 3.9; P < .001) and healthy control participants (OR, 46; 95% CI: 14, 151; P < .001). The association was OR of 2.4 (95% CI: 1.5, 3.8; P < .001) for flexor tendons and OR of 3.1 (95% CI: 1.9, 5.2; P < .001) for extensor tendons. The sensitivity of tenosynovitis in RA was 65 of 157 (41%; 95% CI: 35%, 50%). The specificity for RA was 63 of 284 (78%; 95% CI: 72%, 82%) compared with other arthritides, and three of 193 (98%; 95% CI: 96%, 99%) compared with healthy control participants. Conclusion Tendons at metatarsophalangeal joints are surrounded by tenosynovium. MRI-detected tenosynovitis at metatarsophalangeal joints was specific for rheumatoid arthritis when compared with findings in patients with other arthritides and findings in healthy control participants. © RSNA, 2020 Online supplemental material is available for this article.

Accurately Determining Proper Shoe Size in Patients With Rheumatoid Arthritis

PURPOSE

The aim of this descriptive study was to determine whether people with rheumatoid arthritis (RA) wear adequately fitting footwear.

DESIGN

This observational study was carried out in a health center between January and December 2014 in the state of A Coruña, Spain.

METHOD

A total of 166 patients (47 men, 119 women) completed all stages of the research process. A validated Brannock Device was used to record foot and shoe length and width.

FINDINGS

Only 64 (38.55%) participants wore shoes that met the needs and requirements of their feet, and 98 (59.03%) participants wore the incorrect shoe size, at least in one foot.

CONCLUSIONS

Many patients with RA often wear shoes that are too narrow for their foot. Assessing the proper footwear fit is an important part of the clinical foot examination.

CLINICAL RELEVANCE

Early detection of inappropriate shoe size in patients with RA allows rehabilitation nurses to optimize foot health.

Features of patients with rheumatoid arthritis whose debut joint is a foot or ankle joint: A 5,479-case study from the IORRA cohort

Background

Foot and ankle joint disorders are serious issues for patients with rheumatoid arthritis (RA). We compared the differences between patients with RA whose first symptom involved a foot or ankle joint (FOOT group) versus other joints (non-FOOT group) within the Institute of Rheumatology, Rheumatoid Arthritis (IORRA) cohort in our institute.

Patients and methods

In the IORRA survey conducted in April 2016, patients were invited to complete six questionnaires about their first symptom at RA onset, current foot or ankle symptoms, daily living activities, and mental health. Disease activity, clinical laboratory variables, functional disability, quality of life, use and ratio of anti-inflammatory and antirheumatic drugs, daily living activities and mental health were compared between the two groups.

Results

Among 5,637 Japanese patients with RA who participated in the IORRA survey on April 2016, 5,479 (97.2%) responded to the questionnaire regarding their debut joint. Of these patients, 2,402 (43.8%) reported that their first symptom of RA involved a foot or ankle joint. The FOOT group (n = 2,164) had higher disease activity, higher disabilities, lower quality of life, lower activities of daily living, and poorer mental health and used anti-inflammatory drugs at a higher rate and at higher doses compared with the non-FOOT group (n = 2,164). On the other hand, the use of medications to suppress the disease activity of RA was similar between the groups.

Conclusion

Clinicians should pay more attention to foot and ankle joints in daily practice so as not to underestimate the disease activity of RA.

Foot function in rheumatoid arthritis patients: a cross-sectional study

Rheumatoid arthritis (RA) is a chronic disease that affects mainly small joints from hands and feet. The aims of this study were to analyze the prevalence of foot involvement in a sample of Brazilian RA patients and to explore the influence of disease variables such as inflammatory activity, serological, and epidemiological profile in this type of involvement. One hundred RA patients and 100 healthy controls paired for gender, age, and body mass index answered the FFI-BR (Foot Functional Index-Brazilian version) that evaluates foot function. RA patients had epidemiological and clinical data collection upon direct questioning and chart review. C-reactive protein (CRP), ESR (erythrocyte sedimentation rate), and DAS28-ESR were used to measure disease activity. In the RA sample, 98% had foot pain versus 76% in the controls (p < 0.0001; OR = 15.4; 95% CI = 3.4-67.5); 96% had some difficulty in function versus 66% of controls (p < 0.0001; OR = 12.3; 95% CI = 4.1-36.5); and 73% had some incapacity versus 20% of controls (p < 0.0001; OR = 10.8; 95% CI = 5.5-20.9). Values of FFI-BR showed correlation with ESR (p = 0.006), CRP (p = 0.01), and DAS28-ESR (p < 0.0001). No association between FFI-BR total score and gender, ethnic background, positive rheumatoid factor, tobacco exposure, and any of used medications was found (all p = ns). The majority of RA patients suffers from foot problems and was associated with inflammatory biomarkers. The control of inflammatory activity may help in the treatment of this problem.

Effect of a thin customized insole on pain and walking ability in rheumatoid arthritis: A randomized study

OBJECTIVE

The aim of the study was to investigate the immediate effects of a thin, easily customizable insole on pain and walking ability in patients with rheumatoid arthritis (RA) who have forefoot pain, and to determine whether the insoles were in use 1 year afterwards.

DESIGN

An experimental, assessor-blinded design was applied to compare the immediate effects when walking with or without insoles in random order. After 1 year, a structured telephone interview was conducted.

PARTICIPANTS

Twenty-one subjects with RA and foot pain in at least one forefoot when walking and in response to the Gänslen test were recruited consecutively from the outpatient clinic and the inpatient ward at a hospital for people with rheumatic disease.

INTERVENTION

Each subject was given a 4-mm thin individually customized insole of a malleable plastic material (CI-Core®) with synthetic textile material on the upper side.

MAIN OUTCOME MEASURES

The 6-min walk test (6MWT) was used to assess the ability to walk, and a 10-cm visual analogue scale to measure the intensity of foot pain induced by walking with and without the insole. A standardized questionnaire with five items was used to determine the use of, and degree of satisfaction with, insoles after 1 year.

RESULTS

The median (interquartile range) foot pain intensity was 19 (15) with and 36 (27) without insoles (p < 0.001; effect size = 0.6). No statistically significant differences in 6MWT were found between the presence or absence of insoles (p = 0.07). After 1 year, 90% of the participants were still using the insoles.

CONCLUSIONS

The use of thin, easily customizable insoles resulted in immediate clinically relevant relief in walking-induced forefoot pain. Most of the patients were still using the insoles after 1 year.

Foot health-related quality of life among elderly with and without lesser toe deformities: a case-control study

PURPOSE

The aim of this study was to compare the health-related quality of life impact related to foot health and health in general in older adults with lesser toe deformities (LTD) and without any foot conditions.

METHODS

A case-control observational study was carried out following the Strengthening the Reporting of Observational Studies in Epidemiology criteria. A total of 100 older adults with a mean age of 74.39±6.02 years were recruited at an outpatient clinic; 50 of these subjects had LTD (case group) and 50 subjects were without any foot conditions (control group). Presence of LTD was determined in both feet using the Kelikian push-up test, and the Foot Health Status Questionnaire scores were self-reported.

RESULTS

The case group showed lower scores in quality of life in relation to health in general and to foot health specifically. Statistically significant differences (p<0.05) between case and control groups were shown by means of the Wicoxon test.

CONCLUSION

A negative impact in quality of life in relation to foot health should be considered in older adults with LTD, regardless of gender.

Identifying the primary outcome for a randomised controlled trial in rheumatoid arthritis: the role of a discrete choice experiment

Background

This study sought to establish the preferences of people with Rheumatoid Arthritis (RA) about the best outcome measure for a health and fitness intervention randomised controlled trial (RCT). The results of this study were used to inform the choice of the trial primary and secondary outcome measure.

Methods

A discrete choice experiment (DCE) was used to assess people’s preferences regarding a number of outcomes (foot and ankle pain, fatigue, mobility, ability to perform daily activities, choice of footwear) as well as different schedules and frequency of delivery for the health and fitness intervention. The outcomes were chosen based on literature review, clinician recommendation and patients’ focus groups. The DCE was constructed in SAS software using the D-efficiency criteria. It compared hypothetical scenarios with varying levels of outcomes severity and intervention schedule. Preference weights were estimated using appropriate econometric models. The partial log-likelihood method was used to assess the attribute importance.

Results

One hundred people with RA completed 18 choice sets. Overall, people selected foot and ankle pain as the most important outcome, with mobility being nearly as important. There was no evidence of differential preference between intervention schedules or frequency of delivery.

Conclusions

Foot and ankle pain can be considered the patient choice for primary outcome of an RCT relating to a health and fitness intervention. This study demonstrated that, by using the DCE method, it is possible to incorporate patients’ preferences at the design stage of a RCT. This approach ensures patient involvement at early stages of health care design.

Electronic supplementary material

The online version of this article (10.1186/s13047-017-0240-3) contains supplementary material, which is available to authorized users.

Rheumatoid arthritis in review: Clinical, anatomical, cellular and molecular points of view

Rheumatoid arthritis (RA) is the most common chronic autoimmune disease of the joints affecting close to 0.5-1.0% of the general population. Although the etiopathogenesis of RA remains elusive, the involvement of dendritic cells and type 17 T-helper cells appears to be pivotal in maintaining a state of chronic inflammation. RA is generally characterized by small joint involvement. A chronic inflammatory process leads to joint destruction and to tendon and ligament laxity and disintegration. These processes result in an imbalance of forces acting on the joints causing joint deformities including swan neck deformity, boutonniere deformity of the hands, flexion deformity of the wrist, lesser toe deformities, and others. In some instances, bony erosions subsequent to the RA disease process can result in life-threatening events including, for example, atlanto-axial subluxation, which can cause myelopathy and paralysis; and basilar invagination, which can cause brain stem injury and imminent death. Although less commonly involved, larger joints are not spared, as evidenced by the involvement of the elbow, hip, and shoulder joints in a sizable proportion of RA patients. The progression and prognosis of this disease entity are variable, guarded and dependent on the efficacy and response to treatment modalities employed. Inadequate management results in disease progression, which ultimately leads to joint erosion, destruction, deformities and substantial decrease in the functional quality of life. Clin. Anat. 31:216-223, 2018. © 2017 Wiley Periodicals, Inc.

Impact of midfoot and Hindfoot involvement on functional disability in Korean patients with rheumatoid arthritis

Background

Foot involvement in rheumatoid arthritis (RA) patients has been reported to severely affect functional capacity and quality of life. We aimed to determine the impact of midfoot and hindfoot involvement on functional disability in Korean patients with RA.

Methods

We evaluated the RA involvement and deformity of three regions of the foot (forefoot, midfoot and hindfoot) and ankle using conventional radiography in Korean patients with RA. We compared the clinical features between RA patients with and without foot or ankle involvement. Using multivariable logistic regression analyses, the impact of midfoot or hindfoot involvement on functional disability in RA patients was evaluated.

Results

Overall, 120 patients with a median age of 48.0 [interquartile range (IQR), 37–56] years and median disease duration of 58.0 (IQR, 10–89) months were included. The prevalence of foot or ankle RA involvement was 74 (61.7%). The number of patients with forefoot, midfoot, hindfoot and ankle involvement was 32 (43.2%), 24 (32.4%), 46 (62.2%) and 4 (5.4%), respectively. Compared to patients without foot or ankle involvement those with such involvement had greater disease activity and functional disability, more of them were treated with biologic agents, and they had a lower health-related quality of life. After adjusting for potential confounders, hindfoot involvement was associated with a higher degree of functional disability. However, walking difficulty was more associated with midfoot involvement rather than with involvement in other regions.

Conclusions

In Korean patients with RA, hindfoot involvement is associated with functional disability and midfoot involvement affects walking.

Electronic supplementary material

The online version of this article (doi:10.1186/s12891-017-1726-7) contains supplementary material, which is available to authorized users.

Discordance between clinical and imaging criteria: assessment by magnetic resonance imaging of the foot of patients with rheumatoid arthritis

Evaluation of the correlation between disease activity and joint involvement was assessed by MRI in the clinically dominant foot of patients with RA. We conducted a cross-sectional descriptive study of 55 patients with RA, who were subjected to clinical evaluation and MRI assessment. Imaging of the clinically dominant foot was performed, and both the Disease Activity Score 28 (DAS28-CRP) and the Health Assessment Questionnaire-Disability Index (HAQ-DI) were measured. The majority of patients classified as in clinical remission presented some degree of inflammatory activity upon MRI evaluation. Statistical analysis demonstrated no correlation between MRI findings and clinical scores. There is evidence of disease activity on MRI of the clinically dominant foot even in patients classified as in clinical remission according to the DAS28-CRP criteria.

Prevalence of foot problems in people with inflammatory arthritis in Singapore

Background

Foot problems are highly prevalent in people with inflammatory arthritis reported from studies in the UK, Europe and New Zealand, but there is limited evidence from Southeast Asia. The study aim was to evaluate the prevalence of foot problems in people with inflammatory arthritis in Singapore.

Methods

People with inflammatory arthritis were recruited from the rheumatology outpatient clinic of a tertiary hospital in Singapore. Disease and clinical characteristics included age, sex, disease duration, current blood tests and medications. The Leeds Foot Impact Scale was used to evaluate foot impairment/disability and the Modified Health Assessment Questionnaire was used to assess global function.

Results

We recruited 101 people with inflammatory arthritis, of which 50 % were female. The majority of participants were Chinese (70 %). The mean (SD) age was 52 (15) years, and the mean (SD) disease duration was 9.3 (0.3) years. The most commonly reported inflammatory arthritic conditions were rheumatoid arthritis (46), gout (31) and spondyloarthritis (15 %). The mean (SD) of the total Leeds Foot Impact Scale was 17 (13) indicating moderate to severe levels of foot impairment and activity limitation. Over 80 of participants reported foot pain during the course of their condition, and 48 % reported current foot pain. Despite the high prevalence of foot pain, only 21 participants (21 %) had been referred to a podiatrist.

Conclusion

This is the first study to investigate the prevalence of foot problems in people with inflammatory arthritis from Singapore. The majority of the participants reported foot problems, but had not been referred to a podiatry service.

Electronic supplementary material

The online version of this article (doi:10.1186/s13047-016-0169-y) contains supplementary material, which is available to authorized users.

Changes in foot function, disease activity, and disability after forefoot resection arthroplasty in patients with rheumatoid arthritis

The purpose of this study was to investigate the changes in foot function, disease activity, and disability in patients with RA after resection arthroplasty of the forefoot (arthroplasty). Arthroplasty was performed on 11 patients with RA. All study patients underwent clinical assessment to measure disease activity (Disease Activity Score in 28 Joints-C-reactive protein, DAS28-CRP), disability (Health Assessment Questionnaire-Disability Index, HAQ-DI) and foot function (Foot Function Index, FFI) at the following stages: preoperatively and 1, 3, and 12 months after surgery. Following arthroplasty, foot function improved significantly, as assessed by FFI total and subscales (pain, disability, and limitation of activity) (P<0.001, P<0.001, P<0.001, and P=0.002, respectively). Disease activity was significantly improved in relation to DAS28-CRP and its subscales of number of swollen joints and patient global assessment (PtGA) (P=0.033, P=0.008, and P=0.038, respectively). There was no significant difference in disability, as assessed by the HAQ-DI and its subscale, HAQ-walking (P=0.150 and P=0.597, respectively). Foot function improved significantly after arthroplasty, and was maintained at 12 months postoperatively. Additionally, our study showed that disease activity and its subscale PtGA improved after arthroplasty.

Foot Health Education for People with Rheumatoid Arthritis: '…. A Game of Chance…' - A Survey of Patients' Experiences

OBJECTIVE

Up to 90% of people with rheumatoid arthritis (RA) experience foot problems leading to reduced function, mobility, quality of life and social participation, and impacts on body image, but these can be improved with general foot care, orthoses, footwear and patient education. Foot health patient education is lacking, so the aim of the present study was to identify the foot health educational needs of people with RA in relation to its content, timing, mode of delivery and the perceived barriers to its provision.

METHODS

People with RA completed an online survey and provided free-text comments for thematic analysis.

RESULTS

A total of 249 people completed the free-text section of the survey. Five main themes emerged: 'Forgotten feet'; 'Too little, too late'; 'Lacks and gaps'; 'I am my feet' and 'Game of chance'.

CONCLUSION

Foot pathology in people with RA has a bio-psychosocial impact on their lives. Foot health and related information appears to be considered rarely within the medical consultation. Access to foot health information and services is limited owing to a lack of patient and/or health professional awareness, with a detrimental impact on the prognosis of their foot health. The importance of foot health in people with RA should be reinforced for patients and health professionals alike. Opportunities to discuss foot health within the medical consultation should be provided regularly. Copyright © 2015 John Wiley & Sons, Ltd.

Quality of Life Impact Related to Foot Health in a Sample of Older People with Hallux Valgus

Hallux Valgus (HV) is a highly prevalent forefoot deformity in older people associated with progressive subluxation and osteoarthritis of the first metatarsophalangeal (MTP) joint and it is believed to be associated with varying degrees of HV effect on the quality of life related to foot health. The aim of this study is to compare the impact of varying degrees of HV on foot health in a sample of older people. The sample consisted of 115 participants, mean age 76.7 ± 9.1, who attended an outpatient center where self-report data were recorded. The degree of HV deformity was determined in both feet using the Manchester Scale (MS) from stage 1 (mild) to 4 (very severe). Scores obtained on the Foot Health Status Questionnaire (FHSQ) were compared. This has 13 questions that assess 4 health domains of the feet, namely pain, function, general health and footwear. The stage 4 of HV shown lower scores for the footwear domain (11.23 ± 15.6); general foot health (27.62 ± 19.1); foot pain (44.65 ± 24.5); foot function (53.04 ± 27.2); vigour (42.19 ± 16.8); social capacity (44.46 ± 28.1); and general health (41.15 ± 25.5) compared with stage 1 of HV (P<0.05) and there were no differences of physical activity (62.81 ± 24.6). Often, quality of life decreases in the elderly population based in large part on their foot health. There is a progressive reduction in health in general and foot health with increasing severity of hallux valgus deformity which appears to be associated with the presence of greater degree of HV, regardless of gender.

Application of plantography examination to the assessment of foot deformity in patients with rheumatoid arthritis

INTRODUCTION

Rheumatoid arthritis (RA) is a chronic, inflammatory and multiple-system disorder of connective tissue. It frequently affects joints and periarticular structures of feet that constitute a significant supporting element underlying normal gait and motion of the body centre of gravity. The aim of the study was to evaluate foot deformities on the basis of plantography examination in RA patients according to the severity of the disease.

MATERIAL AND METHODS

The study was performed on 54 RA patients. The control group consisted of 34 volunteers free of any disorders. Plantography examination was carried out by means of a CQ ST2K podoscope. The following parameters were applied to the assessment of the disturbances of foot statics: hallux valgus angle (α), Sztriter-Godunow index (KY), Wejsflog's index (Wwp) and Clarke's angle (CL).

RESULTS

Markedly higher values of the α angle were noted in RA patients, reflecting the presence of hallux valgus. Moreover, values of the α angle were higher in patients in the third stage of radiological changes than those in the second one. On the other hand, values of Clarke's angle for the right foot were significantly higher in men in the second and third stage of RA compared to the control group. The most common deformities in RA patients include HV and transverse flat foot, more explicit in women in the third stage of RA.

CONCLUSIONS

Plantography examination has been shown to constitute a useful diagnostic tool for assessment and monitoring of foot deformities in RA patients.

Perceived barriers to the management of foot health in patients with rheumatic conditions

BACKGROUND

Rheumatic conditions can have a significant impact on the feet and requires effective management. Podiatric involvement in the management of rheumatic conditions has previously been found to be inadequate in a hospital-setting and no study has examined current trends across New Zealand. The aim was to evaluate the perceived barriers of New Zealand podiatrists in the management of rheumatic conditions.

METHODS

A cross-sectional observational design using a web-based survey. The self-administered survey, comprising of thirteen questions, was made available to podiatrists currently practicing in New Zealand.

RESULTS

Fifty-six podiatrists responded and the results demonstrated poor integration of podiatrists into multidisciplinary teams caring for patients with arthritic conditions in New Zealand. Dedicated clinical sessions were seldom offered (16%) and few podiatrists reported being part of an established multidisciplinary team (16%). A poor uptake of clinical guidelines was reported (27%) with limited use of patient reported outcome measures (39%). The majority of podiatrists expressed an interest in professional development for the podiatric management of arthritic conditions (95%). All surveyed podiatrists (100%) agreed that there should be nationally developed clinical guidelines for foot care relating to arthritis.

CONCLUSIONS

The results suggest that there are barriers in the involvement of podiatrists in the management of people with rheumatic conditions in New Zealand. Future studies may provide an in-depth exploration into these findings to identify and provide solutions to overcome potential barriers.

An evaluation of seasonal variations in footwear worn by adults with inflammatory arthritis: a cross-sectional observational study using a web-based survey

Background

Foot problems are common in adults with inflammatory arthritis and therapeutic footwear can be effective in managing arthritic foot problems. Accessing appropriate footwear has been identified as a major barrier, resulting in poor adherence to treatment plans involving footwear. Indeed, previous New Zealand based studies found that many people with rheumatoid arthritis and gout wore inappropriate footwear. However, these studies were conducted in a single teaching hospital during the New Zealand summer therefore the findings may not be representative of footwear styles worn elsewhere in New Zealand, or reflect the potential influence of seasonal climate changes. The aim of the study was to evaluate seasonal variations in footwear habits of people with inflammatory arthritic conditions in New Zealand.

Methods

A cross-sectional study design using a web-based survey. The survey questions were designed to elicit demographic and clinical information, features of importance when choosing footwear and seasonal footwear habits, including questions related to the provision of therapeutic footwear/orthoses and footwear experiences.

Results

One-hundred and ninety-seven participants responded who were predominantly women of European descent, aged between 46–65 years old, from the North Island of New Zealand. The majority of participants identified with having either rheumatoid arthritis (35%) and/or osteoarthritis (57%) and 68% reported established disease (>5 years duration). 18% of participants had been issued with therapeutic footwear. Walking and athletic shoes were the most frequently reported footwear type worn regardless of the time of year. In the summer, 42% reported wearing sandals most often. Comfort, fit and support were reported most frequently as the footwear features of greatest importance. Many participants reported difficulties with footwear (63%), getting hot feet in the summer (63%) and the need for a sandal which could accommodate a supportive insole (73%).

Conclusions

Athletic and walking shoes were the most popular style of footwear reported regardless of seasonal variation. During the summer season people with inflammatory arthritis may wear sandals more frequently in order to accommodate disease-related foot deformity. Healthcare professionals and researchers should consider seasonal variation when recommending appropriate footwear, or conducting footwear studies in people with inflammatory arthritis, to reduce non-adherence to prescribed footwear.

The rheumatoid forefoot

Rheumatoid arthritis (RA) manifests itself in a variety of ways, with its effect being seen in around 90 % of sufferers' feet. The foot has been found to be the most common reason for incapacity in patients with RA, with the forefoot the most common area. The foot is second, behind only the hand, as the most common place for manifestation of RA. Pain in the foot is commonly the most debilitating condition, which causes the patient to seek specialist help. As well as pain, foot deformities such as hallux valgus and claw toes are common complaints. These symptoms often arise as a result of continued walking on an unstable foot, leading to painful callosities and dislocation of the metatarsophalangeal joints. Other conditions, such as pannus formation and Morton's neuroma, can be related to RA. This review sets out what we believe to be a successful approach to the rheumatoid forefoot, which aims at the relief of pain and the preservation of ambulation. Key to a successful outcome is appropriate medical control with a multidisciplinary approach that enables close liaison between orthopaedic surgeons, orthotists, and rheumatologists. Combined clinics provide this multidisciplinary care. Those treating RA need to be aware of the high incidence of foot involvement and how early intervention may benefit the patient. The aim of this article is to present current evidence to enable people to develop a treatment algorithm for this condition.

Rheumatoid forefoot deformity: pathophysiology, evaluation and operative treatment options

Despite recent advances in pharmacological management of rheumatoid arthritis, forefoot deformity, with its symptoms, remains a common problem, often requiring operative treatment. Typical deformities in these patients comprise hallux valgus and deformity of the lesser metatarsophalangeal (MTP) joints and toes. With regard to the lesser rays the standard operative procedure, advocated for the disabling forefoot pain in these patients, remains metatarsal head resection. It should be considered that with increasing success of pharmacological treatment the degree of forefoot deformity in these patients is becoming less and that resection of the lesser MTP joints is becoming more and more superfluous. This supports a trend towards metatarsal head-preserving surgery. The optimal treatment of the hallux deformity remains unclear. Fusion of the first MTP joint is, generally, recommended. This article will discuss the current surgical options in rheumatoid forefoot pathology.

Additive hindfoot arthrodesis for rheumatoid hindfoot disease: a clinical study of patient outcomes and satisfaction

Advanced rheumatoid hindfoot disease causes significant pain and disability. Hindfoot arthrodesis is a useful procedure but is often overlooked as a treatment option. The objective of this study was to report the improvements in patients' health, pain, functional ability and satisfaction following this procedure. Thirty-seven patients with rheumatoid arthritis (RA) were recruited from the outpatient clinic and underwent 42 hindfoot arthrodesis procedures by a single surgeon. Outcome measures were SF12 score, Manchester-Oxford Foot Questionnaire index score, visual analogue pain score and satisfaction scores, as well as radiographic assessment. Assessment was undertaken at the pre-admission clinic and at 6 and 12 months post-operatively. Statistically significant improvements were seen at 6 and 12 months in all measured outcomes. The union rate was 97.6%. The satisfaction rate was 92.5%. The complication rate was 7.1%. The functional benefit and outcome scores are comparable to those reported following hip and knee replacement in patients with RA. The findings of this study provide evidence that hindfoot arthrodesis should be considered a worthwhile surgical treatment in the rheumatoid patient with advanced hindfoot disease. Healthcare professionals involved in the management of these patients should be aware of the potential benefits of this procedure and refer early to a foot and ankle surgeon specialist when conservative treatment modalities have failed.