Tools to assess living with a chronic illness: A systematic review

First validation study of the living with long term conditions scale (LwLTCs) among English-speaking population living with Parkinson's disease

INTRODUCTION

Parkinson's disease is the second most prevalent neurodegenerative disease, affecting 10 million people worldwide. Health and social care professionals need to have personalised tools to evaluate the process of living with Parkinson's disease and consequently, plan individualised and targeted interventions. Recently, the English version of the Living with Long term conditions (LwLTCs) scale has been developed filling an important gap related to person-centred tools to evaluate the process of living with long term conditions among English-speaking population. However, no validation studies for testing its psychometric properties have been conducted.

AIM

To analyse the psychometric properties of the LwLTCs scale in a wide English-speaking population living with Parkinson's disease.

METHODS

Validation study, with an observational and cross-sectional design. The sample was composed of individuals living with Parkinson's disease from non-NHS services in the community. Psychometric properties including feasibility and acceptability, internal consistency, reproducibility, and construct, internal and known-groups validity were tested.

RESULTS

A total sample of 241 people living with Parkinson's disease were included. 6 individuals did not complete 1 or 2 items on the scale. Ordinal alpha was 0.89 for the total scale. The intraclass correlation coefficient for the total scale was 0.88. The LwLTCs scale is strongly correlated with scales measuring satisfaction with life (r_s=0.67), quality of life (r_s=0.54), and moderately correlated with social support (r_s=0.45). Statistically significant difference just for therapy and co-morbidity, yet no for gender, employment situation, or lifestyle changes.

CONCLUSIONS

The LwLTCs scale is a valid scale to evaluate how the person is living with Parkinson's disease. Future validation studies to prove the repeatability of the total scale and particularly, domains 3-Self-management, and 4-Integration and internal consistency will be needed. Developing further studies on the English version of the LwLTC in people with other long term conditions is also proposed.

Living with Chronic Illness Scale: International validation through the classic test theory and Rasch analysis among Spanish-speaking populations with long-term conditions

BACKGROUND

The Living with Chronic Illness (LW-CI) Scale is a comprehensive patient-reported outcome measure that evaluates the complex process of living with long-term conditions.

OBJECTIVE

This study aimed to analyse the psychometric properties of the LW-CI scale according to the classic test theory and the Rasch model among individuals living with different long-term conditions.

DESIGN

This was an observational, international and cross-sectional study.

METHODS

A total of 2753 people from six Spanish-speaking countries living with type 2 diabetes mellitus, chronic obstructive pulmonary disease, chronic heart failure, Parkinson's disease, hypertension and osteoarthritis were included. The acceptability, internal consistency and validity of the LW-CI scale were analysed using the classical test theory, and fit to the model, unidimensionality, person separation index, item local independency and differential item functioning were analysed using the Rasch model.

RESULTS

Cronbach's α for the LW-CI scale was .91, and correlation values for all domains of the LW-CI scale ranged from .62 to .68, except for Domain 1, which showed correlation coefficients less than .30. The LW-CI domains showed a good fit to the Rasch model, with unidimensionality, item local independency and moderate reliability providing scores in a true interval scale. Except for two items, the LW-CI scale was free from bias by long-term condition type.

DISCUSSION

After some adjustments, the LW-CI scale is a reliable and valid measure showing a good fit to the Rasch model and is ready for use in research and clinical practice. Future implementation studies are suggested.

PATIENT AND PUBLIC CONTRIBUTION

Patient and public involvement was conducted before this validation study - in the pilot study phase.

[Validation of the living with osteoarthritis in Spanish population]

Objetivo

Presentar los resultados psicométricos de la escala de convivencia con artrosis (EC-Artrosis) en la población española.

Diseño

Estudio observacional, multicéntrico y transversal, con retest en una fracción de la muestra.

Emplazamiento

Centros públicos y privados de atención primaria y secundaria, así como asociaciones de pacientes con artrosis de Navarra, La Rioja, Madrid, Valencia y Málaga.

Participantes

La muestra estuvo compuesta por un total de 291 pacientes con diagnóstico de artrosis por su médico, en cualquier estadio de la enfermedad de atención primaria o especializada, nacionalidad española, y no hospitalizados.

Intervenciones

De manera adicional a la EC-Artrosis, se incluyó un cuestionario sociodemográfico y escalas para evaluar el apoyo social percibido por el paciente (DUFSS), la calidad de vida relacionada con la salud (WHOQOL-BREF) y la escala de satisfacción con la vida del paciente.

Mediciones principales

Se analizaron las propiedades psicométricas de la escala EC-Artrosis, tales como viabilidad y aceptabilidad, fiabilidad (consistencia interna y estabilidad), precisión y validez de constructo (convergente, interna y para grupos conocidos).

Resultados

El 100% de los datos fueron computados. La calidad de los datos y la aceptabilidad fueron excelentes. El alfa de Cronbach para el total de la escala fue de 0,87 y el índice de homogeneidad de 0,22. El ICC para el total de la escala fue de 0,88. En cuanto a la precisión, el valor del EEM fue de 5,18 (<½DE = 7,47).

Conclusiones

La EC-Artrosis ha mostrado ser un instrumento válido y fiable para evaluar la convivencia del paciente con artrosis a nivel nacional.

Validation of living with chronic illness scale in a type 2 diabetes mellitus population

Background

Worldwide, type 2 diabetes mellitus (T2DM) is one of the most prevalent chronic diseases and one of those producing greatest impact on patients’ day-to-day quality of life. Our study aim is to validate the “Living with Chronic Illness Scale” for a Spanish-speaking T2DM population.

Methods

In this observational, international, cross-sectional study, 582 persons with T2DM were recruited in primary care and outpatient hospital consultations, in Spain and Colombia, during the period from May 2018 to June 2019. The properties analysed were feasibility/acceptability, internal consistency, reliability, precision and (structural) content-construct validity including confirmatory factor analysis. The COSMIN checklist was used to assess the methodological/psychometric quality of the instrument.

Results

The scale had an adequate internal consistency and test retest reliability (Cronbach’s alpha = 0.90; intraclass correlation coefficient = 0.96, respectively). In addition, the instrument is precise (standard error of measurement = 3.34, with values < ½SD = 8.52) and correlates positively with social support (DUFSS) (r_s = 0.56), quality of life (WHOQOL-BREF) (r_s = 0.51–0.30) and ssatisfaction with life (SLS-6) (r_s = 0.50–0.38). The original 26-items version of the scale did not support totally the confirmatory factor analysis. The COSMIN checklist is favourable for all the properties analysed, although weaknesses are detected for structural validity.

Conclusions

The LW-CI-T2DM is a valid, reliable and accurate instrument for use in clinical practice to determine how a person’s life is affected by the presence of diabetes. This instrument correlates well with the associated constructs of social support, quality of life and satisfaction. Additional research is needed to determine how well the questionnaire structure performs when robust factor analysis methods are applied.

Supplementary Information

The online version contains supplementary material available at 10.1186/s12955-021-01715-x.

Living with Long term condition Scale: A pilot validation study of a new person centred tool in the UK

AIM

To cross-culturally adapt and determine the preliminary psychometric properties of the English version of the LwLTC Scale in people living with long-term conditions in the UK.

DESIGN

Cross-cultural adaptation and cross-sectional study.

METHODS

Forty-nine patients with five long-term conditions were included in the pilot study. Patients completed the English version of the LwLTC Scale and a bespoke questionnaire related to the scale. Feasibility/acceptability, internal consistency and construct validity were analysed.

RESULTS

59.2% of participants were female, with an average age of 65.9 (SD = 12.30). Cronbach's alpha coefficient ranged between 0.50 and 0.84. Content validity showed that the English version of the LwLTC Scale was useful even negative items were identified.

CONCLUSION

These preliminary psychometric properties are satisfactory and promising. Further psychometric analyses are needed to verify them in a larger and more representative sample size during the main validation study, which is now in process.

Psychometric Validation of the Living with Chronic Illness Scale in Patients with Chronic Heart Failure

It is necessary to develop self-reported instruments that evaluate the process of living with chronic heart failure (HF) holistically. The Living with Chronic Illness Scale—HF (LW-CI-HF) is the only available tool to evaluate how patients are living with HF. The aim is to analyse the psychometric properties of the LW-CI scale in the HF population. An international, cross-sectional validation study was carried out in 603 patients living with HF from Spain and Colombia. The variables measured were living with HF, perceived social support, satisfaction with life, quality of life and global impression of severity. The LW-CI-HF scale presented good data quality and acceptability. All domains showed high internal consistency with Cronbach’s alpha coefficient ≥ 0.7. The intraclass correlation coefficient for the total score was satisfactory (0.9) in test–retest reliability. The LW-CI-HF correlated 0.7 with social support and quality of life measures. Standard error of measurement was 6.5 for total scale. The LW-CI-HF scale is feasible, reliable and valid. However, results should be taken with caution in order to be used in clinical practice to evaluate the complex process of living with HF. Further research is proposed.

Ensuring that the outcome domains proposed for use in burns research are relevant to adult burn patients: a systematic review of qualitative research evidence

Background

There have been several attempts to define core outcome domains for use in research focused on adult burns. Some have been based in expert opinion, whilst others have used primary qualitative research to understand patients' perspectives on outcomes. To date there has not been a systematic review of qualitative research in burns to identify a comprehensive list of patient-centred outcome domains. We therefore conducted a systematic review of qualitative research studies in adult burns.

Methods

We searched multiple databases for English-language, peer-reviewed, qualitative research papers. We used search strategies devised using the SPIDER tool for qualitative synthesis. Our review utilized an iterative three-step approach: (1) outcome-focused coding; (2) development of descriptive accounts of outcome-relevant issues; and (3) revisiting studies and the broader theoretical literature in order to frame the review findings.

Results

Forty-one articles were included. We categorized papers according to their primary focus. The category with the most papers was adaptation to life following burn injury (n = 13). We defined 19 outcome domains across the 41 articles: (1) sense of self; (2) emotional and psychological morbidity; (3) sensory; (4) scarring and scar characteristics; (5) impact on relationships; (6) mobility and range of joint motion; (7) work; (8) activities of daily living and self-care; (9) treatment burden; (10) engagement in activities; (11) wound healing and infection; (12) other physical manifestations; (13) financial impact; (14) impact on spouses and family members; (15) analgesia and side effects; (16) cognitive skills; (17) length of hospital stay; (18) access to healthcare; and (19) speech and communication. We suggest that sense of self is a core concern for patients that, to date, has not been clearly conceptualized in the burns outcome domain literature.

Conclusions

This outcome domain framework identifies domains that are not covered in previous attempts to outline core outcome domains for adult burn research. It does so with reference to existing theoretical perspectives from the sociology and psychology of medicine. We propose that this framework can be used as a basis to ensure that outcome assessment is patient-centred. Sense of self requires further consideration as a core outcome domain.

Outcomes important to patients with non-infectious posterior segment-involving uveitis: a qualitative study

OBJECTIVE

Uveitis, a group of disorders characterised by intraocular inflammation, causes 10%-15% of total blindness in the developed world. The most sight-threatening forms of non-infectious uveitis are those affecting the posterior segment of the eye, collectively known as posterior segment-involving uveitis (PSIU). Numerous different clinical outcomes have been used in trials evaluating treatments for PSIU, but these may not represent patients' and carers' concerns. Therefore, the aims of this study were to understand the impact of PSIU on adult patients' and carers' lives and to explore what outcomes of treatment are important to them.

METHODS AND ANALYSIS

Four focus group discussions were undertaken to understand the perspectives of adult patients (=18) and carers (10) with PSIU. Participants were grouped according to whether or not their uveitis was complicated by the sight-threatening condition uveitic macular oedema. Discussions were audio-recorded, transcribed and analysed using the framework analytical approach. Outcomes were identified and grouped into outcome domains.

RESULTS

Eleven core domains were identified as important to patients and carers undergoing treatment for PSIU, comprising (1) visual function, (2) symptoms, (3) functional ability, (4) impact on relationships, (5) financial impact, (6) psychological morbidity and emotional well-being, (7) psychosocial adjustment to uveitis, (8) doctor/patient/interprofessional relationships and access to healthcare, (9) treatment burden, (10) treatment side effects, and (11) disease control.

CONCLUSION

The domains identified represent patients' and carers' experience and perspectives and can be used to reflect on outcomes assessed in PSIU. They will directly inform the development of a core outcome set for PSIU clinical trials.

[Living with Chronic Illness Scale: Pilot study in patients with several chronic diseases]

OBJECTIVE

To present the pilot study of the Living with Chronic Illness Scale (EC-PC) in patients with diabetes mellitus type 2, chronic heart failure, chronic obstructive pulmonary disease and osteoarthritis.

DESIGN

Observational, cross-sectional and multicenter study.

LOCATION

Two specialized hospitals in Navarre and Madrid.

PARTICIPANTS

64 patients with several chronic diseases, older than 18 years old, that go to primary health centre and/or outpatients. Patients with cognitive deterioration and/or psychiatric disorders were excluded.

INTERVENTIONS

Evaluations had an average duration of 15 minutes per patient.

MAIN MEASUREMENTS

Patients completed the EC-PC and a questionnaire related to the scale. Feasibility/acceptability, internal consistency and construct validity was analyzed.

RESULTS

For the total sample, the EC-PC showed a good viability and acceptability, without missing data and with almost 100% of the computable data. Cronbach's alpha coefficient reached values between 0.64 and 0.76, and the homogeneity index was higher than 0.30 in all domains of the scale. The values of internal validity ranged between 0.04 and 0.30. No significant differences were found (p> 0.05) in the total score of the scale according to gender or the different pathologies. The patients described the scale as simple and useful.

CONCLUSIONS

The pilot study of the EC-PC in patients with different chronic illnesses showed that it is a brief, easy to use, reliable and valid measure. The EC-PC will serve to know in an individualized way, how the patient is living with his/her chronic process and to prevent possible negative aspects of the daily living with the disease.