Psychometric evaluation of the Swedish version of the 30-item endometriosis health profile (EHP-30)

Asthma and Asthma Symptoms Associated with Endometriosis and Dysmenorrhea in a Nordic-Baltic Population

Background: Endometriosis, dysmenorrhea, and respiratory symptoms affect large numbers of women. A possible association between asthma and endometriosis has been suggested; however, this relationship is unclear. Dysmenorrhea is very common, and potential associations with asthma symptoms are not known. Aim: To study asthma symptoms associated with endometriosis and dysmenorrhea in women. Methods: We used data from the main and women's questionnaires of the Respiratory Health in Northern Europe study, which included data from women (aged 39-65 years) from Aarhus, Gothenburg, Umeå, Uppsala, Reykjavik, Tartu, and Bergen. Current asthma status was defined by asthma medication usage or asthma attacks in the past 12 months. Asthma symptoms were defined as having ≥3 asthma symptoms in the last 12 months. The data were analyzed using logistic regressions adjusted for age, body mass index, and smoking status. Results: Among 4778 study participants, 201 had endometriosis, and 2154 had dysmenorrhea. Current asthma and asthma symptoms were reported by 14.9% and 12.9%, respectively, of women with endometriosis compared with 9.1% and 9.2%, respectively, of women without endometriosis. The associations of current asthma and asthma symptoms with endometriosis were statistically significant (odds ratio [OR]: 1.87, 95% confidence interval [CI]: 1.25-2.81; and OR: 1.56, 95% CI: 1.01-2.39, respectively). Similar associations were found for dysmenorrhea (current asthma: OR: 1.48, 95% CI: 1.21-1.81; ≥3 asthma symptoms: OR: 1.61, 95% CI: 1.31-1.97). Conclusion: Our study revealed that asthma symptoms were associated with both endometriosis and dysmenorrhea. The associations with dysmenorrhea, which affects a large proportion of women, were almost as strong as the associations with diagnosed endometriosis.

Evaluating quality of life improvements in endometriosis patients following laparoscopic surgery using EHP-30 scale

This study aims to evaluate whether laparoscopic surgery enhances health-related quality of life (HRQoL) in endometriosis patients, utilizing the Endometriosis Health Profile-30 (EHP-30) questionnaire. The study also explores the correlations between disease severity, preoperative scores, and the subsequent changes following surgical intervention. This is a prospective observational study. Seventy women undergoing laparoscopic surgery for endometriosis at Fujian Maternity and Child Health Hospital were prospectively recruited. Each participant was assessed using the EHP-30 questionnaire both 4 weeks prior to and 3 months post-surgery to obtain preoperative and postoperative subscale scores. The Wilcoxon signed-rank test was applied to determine the statistical significance of changes in these scores. Spearman's rank correlation coefficient was employed to explore the relationships between preoperative EHP-30 scores, serum CA125 levels, and intraoperative revised American Society for Reproductive Medicine (rASRM) scores. Statistically significant correlations were further examined using multivariate linear regression analysis to adjust for potential confounders. Laparoscopic surgery resulted in a significant reduction in EHP-30 subscale scores (P ≤ 0.002), indicating a marked improvement in HRQoL among endometriosis patients. Spearman correlation analysis revealed positive correlations between preoperative serum CA125 levels (P = 0.005) and intraoperative rASRM scores with preoperative pain (P = 0.035) and sexual intercourse scores (P = 0.046). Additionally, multivariate linear regression analyses demonstrated that changes in pain scores (ΔPain), control and powerlessness (ΔControl and Powerlessness), and work life (ΔWork Life) were significantly interrelated (P < 0.01). Emotional well-being (ΔEmotional Well-being), control and powerlessness (ΔControl and Powerlessness), and work life (ΔWork Life) also exhibited significant mutual influences (P < 0.01). Furthermore, changes in social support (ΔSocial Support), self-image (ΔSelf-image), and treatment perception (ΔTreatment) were positively correlated (P < 0.01), as were changes in sexual intercourse (ΔSexual Intercourse) and concern about infertility (ΔConcern on Infertility) (P < 0.01). Laparoscopic surgery for endometriosis significantly improves HRQoL by alleviating pain and positively influencing daily functioning and emotional well-being. These findings highlight the critical role of laparoscopic surgery as an effective intervention for enhancing the quality of life in endometriosis patients.

Measurement of changes to the menstrual cycle: A transdisciplinary systematic review evaluating measure quality and utility for clinical trials

Despite the importance of menstruation and the menstrual cycle to health, human rights, and sociocultural and economic wellbeing, the study of menstrual health suffers from a lack of funding, and research remains fractured across many disciplines. We sought to systematically review validated approaches to measure four aspects of changes to the menstrual cycle-bleeding, blood, pain, and perceptions-caused by any source and used within any field. We then evaluated the measure quality and utility for clinical trials of the identified instruments. We searched MEDLINE, Embase, and four instrument databases and included peer-reviewed articles published between 2006 and 2023 that reported on the development or validation of instruments assessing menstrual changes using quantitative or mixed-methods methodology. From a total of 8,490 articles, 8,316 were excluded, yielding 174 articles reporting on 94 instruments. Almost half of articles were from the United States or United Kingdom and over half of instruments were only in English, Spanish, French, or Portuguese. Most instruments measured bleeding parameters, uterine pain, or perceptions, but few assessed characteristics of blood. Nearly 60% of instruments were developed for populations with menstrual or gynecologic disorders or symptoms. Most instruments had fair or good measure quality or clinical trial utility; however, most instruments lacked evidence on responsiveness, question sensitivity and/or transferability, and only three instruments had good scores of both quality and utility. Although we took a novel, transdisciplinary approach, our systematic review found important gaps in the literature and instrument landscape, pointing towards a need to examine the menstrual cycle in a more comprehensive, inclusive, and standardized way. Our findings can inform the development of new or modified instruments, which-if used across the many fields that study menstrual health and within clinical trials-can contribute to a more systemic and holistic understanding of menstruation and the menstrual cycle.

A systematic review to determine use of the Endometriosis Health Profiles to measure quality of life outcomes in women with endometriosis

BACKGROUND

The Endometriosis Health Profiles (EHPs), the EHP-30 and EHP-5, are patient-reported outcome measures that were developed to measure the health-related quality of life (HRQoL) of women living with endometriosis. Prior to their development, a systematic review was undertaken which identified that the HRQoL of women living with endometriosis was poorly understood, with only three medical and one surgical study identified.

OBJECTIVE AND RATIONALE

The 20-year anniversary of the EHP-30 provided a timely opportunity to assess how the tools have been used and explore what the findings tell us about the impact of endometriosis and its associated treatments upon women's QoL. Applying robust systematic review methodology, following PRISMA guidelines, we sought to answer: How many studies have used the EHP and for what purpose?; What are the demographic characteristics and international context of the studies?; What is the methodological nature and quality of the studies?; Which interventions have been assessed and what are the reported EHP outcomes?; and Can the EHP outcomes of these interventions be analysed using a meta-analysis and, if so, what do the results show?

SEARCH METHODS

The electronic databases MEDLINE, CINAHL, PsycINFO, PubMed, and Google Scholar were searched from the year the EHP was first published, in 2001 to 26 February 2020 using the search terms 'EHP30', 'EHP5', 'EHP-30', 'EHP-5', 'endometriosis health profile 30', and 'endometriosis health profile 5'. We updated the searches on 9 April 2021. All included studies were quality assessed using the Mixed Methods Appraisal Tool (MMAT).

OUTCOMES

The review included 139 papers. In clinical intervention studies, the EHPs were deployed most frequently to measure the outcomes of medical (n = 35) and surgical (n = 21) treatment. The EHPs were also used in 13 other intervention studies, 29 non-interventional studies, 32 psychometric/cross cultural validation studies; six diagnostic studies, and in three other studies to measure outcomes in related conditions. They were mainly deployed in studies undertaken in Europe and North America. Overall, regardless of the nature of the intervention, most women reported improvements in HRQoL after treatment. Surgical interventions generally resulted in significant improvements for the longest amount of time. There was also evidence that when participants stopped taking medication their EHP scores worsened, perhaps reinforcing the temporary impact of medical treatment. Younger patients reported more negative impact upon their HRQoL. Further evidence using classical test theory to support the EHPs' robust psychometric properties, including acceptability, dimensionality, reliability, validity (including cross-cultural), and responsiveness, was demonstrated, particularly for the EHP-30. Strikingly, using anchor-based methods, EHP-30 responsiveness studies demonstrate the largest mean changes in the 'control and powerlessness' domain post-intervention, followed by 'pain'. MMAT outcomes indicated the quality of the papers was good, with the exception of five studies. A meta-analysis was not undertaken owing to the heterogeneity of the interventions and papers included in this review.

WIDER IMPLICATIONS

Women with endometriosis face a lifetime of surgical and/or medical interventions to keep the condition under control. Less invasive treatments that can lead to improved longer term physical and psycho-social outcomes are needed. The EHPs are reliable, valid, acceptable, and responsive tools, but more assessment of EHP outcomes using modern psychometric methods and in the context of women from ethnically diverse backgrounds and in routine clinical care would be beneficial. Given the brevity of the EHP-5, it may be the most appropriate version to use in routine clinical practice, whereas the longer EHP-30, which provides more granularity, is more appropriate for research.

Experiences of communication in women with endometriosis: perceived validation and invalidation in different contexts, and associations with health-related quality of life

Endometriosis, a chronic gynecological disease affecting approximately 10% of women of reproductive age, has a significant impact on physical and mental health. This cross-sectional study aimed to explore experiences of validating and invalidating communication in three contexts (with healthcare providers, employers, and family/friends), and whether this may predict health-related quality of life (HRQoL) in women with endometriosis. Data was collected through a digital survey distributed to women with self-reported endometriosis in Sweden. The survey included measures of validating and invalidating communication, depressive symptoms, anxiety, and HRQoL. A total of 427 women participated. The results indicated that women experienced varying levels of validating and invalidating communication in different contexts, with close family/friends providing the highest level of validation, and healthcare providers the lowest. Furthermore, a combined construct of high levels of validation and low levels of invalidation from healthcare providers and from close family and friends were significant predictors of HRQoL. These findings highlight the importance of supportive communication and understanding from healthcare providers and close social networks in promoting the well-being of women with endometriosis. Future research should further explore the impact of validating communication within healthcare settings and develop interventions to improve communication and support for women with endometriosis.

Clinical factors associated with quality of life among women with endometriosis: a cross-sectional study

BACKGROUND

Endometriosis often leads to a decrease in Quality of Life (QoL), due to its impact on various aspects of women's lives, such as social life, mental health, sex life, and working capacity. Although previous studies have assessed QoL in women with endometriosis, few studies have explored the impact of different clinical variables on QoL. The aim of this study was to investigate how women with endometriosis perceive their QoL, and to analyze which clinical factors are associated with QoL.

METHODS

The Endometriosis Health Profile-30 and the ENDOCARE Questionnaire were distributed to 1000 women diagnosed with endometriosis from 10 different clinics across Sweden. The responses from 476 women were included in univariate and multivariable regression analyses, where the clinical factors were correlated with overall QoL and QoL dimensions.

RESULTS

The women participating in this study reported a low QoL. The clinical factors that showed a significant correlation with overall QoL were age at first onset of endometriosis symptoms (β= -0.64, p < 0.001), having more than 10 visits to general practitioners before referral to a gynecologist (β = 5.58, p = 0.036), current or previous mental health issues (β = 7.98, p < 0.001) patient-centeredness (β= -2.59, p < 0.001) and use of opioids (β = 7.14, p = 0.002).

CONCLUSIONS

This study shows that opioid use and mental health issues were associated with a worse QoL, whereas a higher degree of patient-centeredness was associated with a better QoL. The association between opioid use and a worse QoL might not entirely be caused by the opioid use itself but also by symptom severity and mental health issues. An improved patient-centeredness and more focus on taking care of mental health issues would reasonably result in a better QoL for women with endometriosis.

Alexithymia and Loneliness in Women with Endometriosis. Testing the Factorial Structure of the Italian Endometriosis Health Profile (EHP-30) and a Mediation Model

Objective

Endometriosis is a pathological condition characterized by endometrial-like tissue outside the uterus, chronic inflammatory reaction, and pelvic pain that dramatically decrease women's health-related quality of life (HRQoL). Furthermore, this invisible and difficultly diagnosable disease might lead women to experience alexithymia, loneliness, and consequent impairment of perceived quality of life. Firstly, the present study aimed at validating the Italian EHP-30 version which is the most used specific questionnaire for HRQoL measurement. Secondly, the present study aimed at exploring the still understudied relationship between alexithymia and HRQoL in endometriosis conditions, evaluating the mediating role of perceived loneliness.

Method

A total of 435 women with endometriosis (mean age=35.75 years) have been involved. All items were loaded on their own factors.

Results

The measure showed good internal consistency (Cronbach's α ranged between 0.60-0.95 for core and 0.74-0.94 for modular parts). The Italian EHP-30 is a psychometrically valid measure of HRQoL with endometriosis. The tested mediation model provided adequate goodness-of-fit indices (χ2 (51) = 206.071; p < 0.001; RMSEA = 0.084; 90%CI: 0.072, 0.096, CFI = .933, SRMR= 0.058), showing that alexithymia only indirectly affected women's perceived HRQoL, via the mediating effect of feelings of loneliness.

Conclusions

The current study highlighted the pivotal role of perceived loneliness in directly affecting women's quality of life and mediating the effect of the alexithymic experiences.

The psychometric properties test of the Malay version of the endometriosis health profile-30

OBJECTIVES

To validate and determine the psychometric properties of the Malay version of the endometriosis health profile-30 (EHP-30) by confirmatory factor analysis.

METHODS

A cross-sectional study was carried out in the main city of Malaysia at a tertiary teaching hospital between January to April 2021. A total of 218 women diagnosed with endometriosis symptoms were recruited using the universal sampling method to answer the questionnaire.

RESULTS

The revised Malay version of the EHP-30 with 28 items demonstrated that the factor loading of the 28 items had an acceptable value range between 0.60-0.90. The model fit was acceptable after the inclusion of 28 items correlated errors of the root mean square of error approximation: 0.072, 90% confidence interval: [0.065-0.080], comparative fit index (0.939), Tucker-Lewis index (0.932), and Chi-square/degrees of Freedom (2.135). The Cronbach's alpha ranged from 0.89-0.97. Concurrent validity for the composite reliability was between 0.88-0.96, while the average variance extracted was between 0.65-0.74.

CONCLUSION

This revised Malay version of the EHP-30 is a reliable and valid tool that can be used for the next study.

Validation of the Turkish version of Endometriosis Health Profile questionnaire (EHP-30) to evaluate the quality of life in women with endometriosis

BACKGROUND

The Endometriosis Health Profile-30 (EHP-30) is a commonly used tool for assessing the impact of endometriosis on a person's quality of life. The EHP-30 is a 30-item questionnaire that measures various aspects of endometriosis-related health, including physical symptoms, emotional well-being, and functional impairment.

OBJECTIVES

EHP-30 has not yet been evaluated with Turkish patients. Therefore, we aim to develop and validate the Turkish version of EHP-30 in this study.

MATERIALS AND METHODS

This cross-sectional study was conducted with 281 randomly selected patients from Turkish Endometriosis Patient-Support Groups. The items of the EHP-30 distributed across 5 subscales of the core questionnaire are generally applicable to all women with endometriosis. There are 11 items on the pain scale, 6 on the control and powerlessness scale, 4 on the social support scale, 6 on the emotional well-being scale, and 3 on the self-image scale. The patients were asked to complete the form with brief demographic information and psychometric evaluation included factor analysis, convergent validity, internal consistency, test-retest reliability, data completeness and the determination of floor and ceiling effects.

MAIN OUTCOME MEASURE

The main outcomes measures were the test-retest reliability, internal consistency, and the assessment of construct validity.

RESULTS

In this study, 281 completed questionnaires were included with a return rate of 91%. Data completeness was accepted as excellent on all subscales. Floor effects were found in medical profession (37%), children (32%) and work (31%) modules. No ceiling effects were found. Division of the core questionnaire into five subscales identical to the original EHP-30 was confirmed by factor analysis performed. The intraclass correlation coefficient for agreement varied from 0.822 to 0.914. There was agreement between the EHP-30 and EQ-5D-3L on both of the hypotheses that were tested. There was a statistically significant difference in scores between endometriosis patients and healthy women across in all subscales (p<.01).

CONCLUSION

The results of this validation study for the EHP-30 indicated a high level of data completeness, with no significant floor or ceiling effects. The questionnaire demonstrated good internal consistency and excellent test-retest reliability. These findings confirm that the Turkish version of the EHP-30 is a valid and reliable toolfor measuring the health-related quality of life in individuals with endometriosis.

WHAT'S NEW?

EHP-30 had not yet been evaluated with Turkish patients and the results of this study demonstrate the validity and reliability of the Turkish translation of the EHP-30 in assessing endometriosis patients' health-related quality of life.

Health-related quality of life in women with endometriosis: psychometric validation of the Endometriosis Health Profile 30 questionnaire using confirmatory factor analysis

STUDY QUESTION

Which of the competing models of the Endometriosis Health Profile 30 Questionnaire (EHP-30) factor structure is best supported by confirmatory factor analysis (CFA)?

SUMMARY ANSWER

Findings support a five-factor first-order model of the EHP-30, thereby lending support to the model originally suggested by the questionnaire developers.

WHAT IS KNOWN ALREADY

Endometriosis has a negative impact on quality of life, and measures specifically developed to address this impact, such as the EHP-30, are vital in research and disease management. Previous studies have found different models of the EHP-30 factor structure, and generated uncertainty regarding how to use the questionnaire. CFA can be applied to compare competing factor models and determine the underlying structure of a questionnaire.

STUDY DESIGN SIZE DURATION

This cross-sectional multicenter study included 304 women with endometriosis recruited from three different public health service endometriosis clinics (referral centers for treatment of severe endometriosis) and the Danish Endometriosis Patients Association from 2014 to 2015.

PARTICIPANTS/MATERIALS SETTING METHODS

Diagnosis of endometriosis was confirmed in medical records for 84.2% and by histology for 66.8% of participants. Questionnaires (the licensed Danish version of the EHP-30) were sent by post two times with a 6- to 12-week interval. CFA was used to examine construct validity and Bland-Altman plots to examine test-retest reliability and the convergent validity with the Short Form 36 version 2.

MAIN RESULTS AND THE ROLE OF CHANCE

Response rate was high (87.6%). CFA supported the original first-order five-factor structure of the EHP-30, and thereby, the use of five separate scale-scores in clinical and research practice. Visual inspection of Bland-Altman plots suggested excellent test-retest reliability of the EHP-30 and supported the use of a disease specific quality of life instrument for women with endometriosis.

LIMITATIONS REASONS FOR CAUTION

Diagnosis could not be confirmed through histology data in 33.2% of participants. However, subgroup analyses based on women with confirmed histology only, yielded similar results. Data related to menstrual cycle stage and the use of hormonal and pain medication during questionnaire completion were not collected. A larger study, including data from different countries on different continents, would be better designed to exclude potential population bias.

WIDER IMPLICATIONS OF THE FINDINGS

EHP-30, with its original five-factor structure, appears to be a valid, stable, and specific quality of life measure for women with endometriosis. It seems easy to understand, quick to administer, and importantly, scoring might be unaffected by cyclical/menstrual pain symptoms related to endometriosis. The finding of a five-factor model from different studies across several countries supports the crosscultural validity of the EHP-30.

STUDY FUNDING/COMPETING INTERESTS

This work was supported by the Danish Endometriosis Association, which is a nongovernmental organization run by women with endometriosis and by a scholarship from the Health Research Fund of Central Denmark Region. The authors have no conflicts of interest.

TRIAL REGISTRATION NUMBER

The Danish Data Protection Agency (J.nr: 2013-41-2264).