Long-term effects on swallowing and laryngeal function after treatment for severe COVID-19 disease in intensive care.

PURPOSE: This study aimed to assess swallowing and laryngeal function at long-term follow-up in patients treated for severe COVID-19 in the ICU. METHODS: Thirty-six patients with severe COVID-19 were prospectively examined with fiberendoscopic evaluation of swallowing (FEES) about 6 and 12 months after ICU discharge. Comparison with initial FEES examinations during the time in hospital was performed in 17 patients. Analysis of swallowing function and laryngeal features was performed from video recordings. Twenty-five participants responded to Eating Assessment Tool, Voice Handicap Index, and the Hospital Anxiety and Depression Scale at follow-up. RESULTS: Penetration to the laryngeal vestibule (PAS ≥ 3) was seen in 22% and silent aspiration (PAS = 8) in 11% of patients on at least one swallow at follow-up. Fourteen percent had obvious residue in the vallecula and/or pyriform sinuses after swallowing thick liquid or biscuits. Self-reported eating and swallowing difficulties were found in 40% of patients. Abnormal findings in the larynx were present in 53% at follow-up. Thirty-three percent had reduced or impaired vocal fold movement, of whom 22% had bilateral impaired abduction of the vocal folds. Possible anxiety and depression were found in 36% and 24% of responders, respectively. CONCLUSION: Although a majority of patients appear to regain normal swallowing function by 1 year after treatment for severe COVID-19, our results indicate that dysphagia, abnormal laryngeal function, and anxiety/depression may remain in a substantial proportion of patients. This suggests that swallowing and laryngeal function, and emotional symptoms, should be followed up systematically over time in this patient group.

Postradiation trismus in head and neck cancer survivors: a qualitative study of effects on life, rehabilitation, used coping strategies and support from the healthcare system.

PURPOSE: This study aimed to explore the experiences of head and neck cancer (HNC) survivors with postradiation trismus, specifically how oncological treatment affected their lives, rehabilitation, use of coping strategies, and healthcare experiences. METHODS: A qualitative descriptive approach was used and semi-structured interviews of 10 HNC survivors with postradiation trismus were conducted 6-30 months after completing oncological treatment. The interviews were transcribed verbatim and analyzed by qualitative content analysis. RESULTS: The analysis of interviews yielded four main categories: Bodily symptoms, Effects on life, Support from the healthcare system, and Strategies to handle life and symptoms. Participants reported ongoing problems with xerostomia, dysgeusia, eating, and limited physical fitness. Pain related to trismus was not a major issue in this cohort. Participants expressed limitations in their social lives due to their eating difficulties, yet a sense of thankfulness for life and overall satisfaction with the healthcare they received. Psychological and practical coping strategies developed by the participants were also revealed. CONCLUSION: The results highlight areas of unmet need among HNC survivors that healthcare providers can target by establishing multi-professional teams dedicated to individualizing post-cancer rehabilitation care.

Do Effects of Voice Rehabilitation in Patients Irradiated for Laryngeal Cancer Remain 5 Years Postradiotherapy?

PURPOSE: Laryngeal cancer treated by radiotherapy results in many patients being left with an abnormal voice long-term. This prospective study aims to report efficacy of voice rehabilitation 5years postradiotherapy completion. METHODS: Seventy-seven patients were randomized into an intervention group (n = 37) or a control group (n = 40). Voice rehabilitation was administered postradiotherapy. Patients were followed at baseline, 12- and 60-month postradiotherapy with voice recordings assessed using GRBAS protocol (Grade, Roughness, Breathiness, Asthenia, Strain). Patients filled in the European Organization for Research and Treatment of Cancer Quality-of-Life Questionnaire Head and Neck 35 (EORTC QLQ-HN35) and the Swedish Self-Evaluation of Communication Experiences after Laryngeal Cancer (S-SECEL). RESULTS: There were no statistically significant differences between the intervention and control group in scores reported on EORTC QLQ-HN35, S-SECEL or in perceptual evaluation at study end-point. The intervention group reported an improvement in EORTC QLQ-HN35 Speech between baseline-60months postradiotherapy. No significant changes between 12-60months were observed. The control group demonstrated significant improvement in domains Pain, Senses, Speech, Social eating and Sexuality from baseline-60months postradiotherapy, of which only Speech showed a statistically significant change between 12-60months postradiotherapy (P = 0.02). Both groups reported improved S-SECEL scores from baseline-60months, with no significant dynamic between the 12- and 60-month follow-up. CONCLUSION: Previously observed positive effects of voice rehabilitation on patient communicative skills and perceptual evaluation are no longer noticeable at 5-year post voice therapy completion. Nevertheless, patients receiving voice rehabilitation experience a greater improvement within the first year, which in the control group takes a corresponding 5years.

A translation and validation of the French version of the Gothenburg Trismus Questionnaire 2 (F-GTQ-2).

BACKGROUND: Limitation of mouth opening, widely known as trismus, is a major symptom altering quality of life in individuals presenting from temporomandibular joint disorder or head and neck cancer. A French-language instrument addressing jaw opening limitation following treatment for head and neck cancer (HNC) or temporomandibular joint disorder (TMD) is lacking. OBJECTIVE: The aim of this study was to translate and validate the Gothenburg Trismus Questionnaire-2 (GTQ-2) into French. METHODS: A French translation of the GTQ-2 was performed according to established international guidelines, leading to the French-GTQ-2 (F-GTQ-2). The validation study included 154 participants with trismus (minimum interincisal opening of ≤35 mm) following treatment for TMD or HNC and 149 age-matched participants without trismus. All participants completed the F-GTQ-2 and participants with trismus completed additional health-related quality of life questionnaires to allow for analysis of convergent validity. RESULTS: The F-GTQ-2 demonstrated retained psychometric properties with Cronbach's alpha values above 0.70 for the domains, jaw-related problems, eating limitations, facial pain and somewhat lower for muscular tension (0.60). Mainly moderate correlations were found when comparing the F-GTQ-2 to other instruments, which was in line with the pre-specified hypotheses, indicating satisfactory convergent validity. Discriminant validity was found with statistically significant differences in all domains of the F-GTQ-2 between trismus and non-trismus participants. CONCLUSION: The F-GTQ-2 can be considered a reliable and valid instrument to assess jaw-related difficulties in individuals with trismus due to HNC or TMD.

Prevalence of Dysphagia and Risk of Malnutrition in Elderly Living in Nursing Homes.

Swallowing difficulties commonly co-occur with malnutrition in the elderly. However, there is no consensus on which assessment tools to use, and thus reported prevalence varies. The aim of this study was to survey the prevalence of dysphagia and risk of malnutrition in elderly people in nursing homes, evaluate the possible associations between swallowing function and malnutrition and survey whether there were associations between self-perceived function and the results of a screening of dysphagia. A total of 35 residents (aged 67-100 years old) without serious cognitive impairment in the general wards of two nursing homes in Gothenburg were investigated. Swallowing ability was assessed with the Gugging Swallowing Screen (GUSS) test, self-rated swallowing ability with the 4QT and the Swedish Eating Assessment Tool-10 (S-EAT-10) and risk of malnutrition with the Minimal Eating Observation and Nutrition Form-Version 2 (MEONF-II). Eleven participants (31.4%) exhibited dysphagia according to the GUSS and 10 participants (29.4%) showed moderate or high risk of malnutrition. In total 16 (46%) participants reported abnormal swallowing on 4QT and 14 (40%) participants reported abnormal swallowing on S-EAT-10. However, less than half of these had dysphagia according to the GUSS. No association was found between swallowing ability measured by the GUSS and risk of malnutrition, although a tendency towards a weak association was noted, or self-rated swallowing ability measured by the 4QT and S-EAT-10. The study found that approximately one-third of the tested participants presented with signs of dysphagia as measured with the screening instrument GUSS, even though only a few were known to have any difficulties prior to testing. This highlights that dysphagia is probably more prevalent than patients themselves and caregivers are aware of, thus, screening is of importance, to enable safer nutritional intake.

Trismus in head and neck cancer: translation and validation of the Chinese version of the Gothenburg Trismus Questionnaire-2 (C-GTQ-2).

OBJECTIVES: Trismus, marked by restricted mouth opening, significantly affects patients with temporomandibular disorder (TMD) and head and neck cancer (HNC). Despite its prevalence, specialized questionnaires for trismus assessment are scarce. This study aims to fill this gap by translating and validating the Gothenburg Trismus Questionnaire version 2 (GTQ-2) into Chinese (C-GTQ-2), enhancing the evaluation of trismus in HNC and TMD patients. MATERIALS AND METHODS: The study involved 78 HNC patients, 75 TMD patients, and a control group of 150 individuals without trismus symptoms. Participants were asked to complete the C-GTQ-2 and other health-related quality of life (HRQL) instruments. A subset of 30 individuals retook the questionnaire within two weeks to assess test-retest reliability. RESULTS: The C-GTQ-2 demonstrated remarkable reliability, with Cronbach's alpha values exceeding 0.70 in three of the four domains, indicating high internal consistency. The instrument also showcased high intra-class correlations in the test-retest, affirming its reliability. Furthermore, it exhibited strong convergent validity, aligning well with other HRQL instruments, and effectively discriminated between patients with and without trismus, establishing its discriminant validity. CONCLUSIONS: The C-GTQ-2 emerges as a valid and reliable tool for assessing trismus in HNC and TMD patients, promising to significantly enhance both clinical and research approaches to managing trismus-related complications in the Chinese-speaking demographic. CLINICAL RELEVANCE: C-GTQ-2 proves effective for trismus assessment in head and neck cancer and temporomandibular disorder patients, offering enhanced clinical and research utility.

Living with dizziness impacts health-related quality of life among older adults.

Objective: This study aimed to compare older adults reporting dizziness to those not reporting dizziness regarding health-related quality of life (HRQL), distress due to dizziness, and balance confidence. A secondary aim was to investigate potential association between HRQL, number of falls, balance confidence, and distress due to dizziness. Methods: Patients coming for bone density measurements answered questions regarding occurrence of dizziness. Patients reporting dizziness on a daily or weekly basis were considered eligible and invited for investigation at the Ear, Nose and Throat clinic at Södra Älvsborg Hospital, Sweden. Patients not reporting dizziness were considered eligible as controls. All patients answered the Dizziness Handicap Inventory (DHI), Activity Balance Confidence Scale (ABC-scale), and Euro-QoL-5D-3L questionnaires. Results: A total of 55 dizzy patients came for physical investigation and answered the questionnaires and 47 non-dizzy participants only answered the questionnaires. The dizzy participants reported lower levels of balance confidence, lower HRQL, more prior falls, and higher levels of distress due to dizziness than the non-dizzy controls. Lower levels of balance confidence and higher level of distress due to dizziness were each associated with lower HRQL. Conclusion: Dizziness, unsteadiness, and low balance confidence are associated with HRQL in a negative way. This is important to consider when measuring HRQL in a senior population, since a sensation of unsteadiness may indirectly contribute to low HRQL together with other symptoms. Level of evidence: 2b.

Facial pain, health-related quality of life and trismus-related symptoms up to 5 years post-radiotherapy for head and neck cancer.

PURPOSE: Pain is a frequent symptom of head and neck cancer (HNC) but longitudinal studies investigating facial pain are scarce. We aimed to investigate prevalence of facial pain, its effect on health-related quality of life (HRQL) and trismus-related symptoms in a HNC cohort. METHODS: Patients (n = 194) were prospectively followed post completion of radiotherapy (RT). Outcome measures included facial pain, HRQL, trismus-specific symptoms, and maximal interincisal opening (MIO). RESULTS: Facial pain was reported by 50% at baseline. Corresponding figures for 3-, 12-, and 60 months post-RT were 70%, 54% and 41%. Moderate to severe pain was reported in 29-44% of patients reporting pain during the study period. Patients reporting pain scored significantly worse on more HRQL variables and trismus symptoms, as well as had significantly smaller MIO at all follow-up time points. CONCLUSIONS: Facial pain was common in HNC patients pre- and post-RT and remained prevalent up to 5 years after completion of RT. Reductions in MIO were associated with more facial pain. Pain was also associated with worse HRQL.

A randomized controlled study evaluating the head-lift exercise in head and neck cancer patients with radiation-induced dysphagia: effect on swallowing function and health-related quality of life over 12 months.

PURPOSE: Dysphagia is common after radiotherapy for head and neck cancer (HNC) and can affect health-related quality of life (HRQL). This randomized controlled trial aimed to evaluate the effect of the head-lift exercise (HLE) over 12 months in HNC patients with radiation-induced dysphagia. METHODS: Sixty-one patients with dysphagia were randomized to intervention group (n = 30) and control group (n = 31) at 6-36 months after completion of radiotherapy for HNC. Dysphagia-specific HRQL was measured with the MD Anderson Dysphagia Inventory (MDADI); general and HNC-specific HRQL was measured with the European Organization for Research and Treatment of Cancer Quality of Life questionnaire Core 30 (EORTC QLQ-C30) and QLQ-H&N35. Measurements were made at baseline, and at 8 weeks and 12 months after start of intervention. RESULTS: Adherence to the intervention was good throughout the year. When comparing change from baseline reports to each follow-up no statistically significant differences between the groups were found in any of the HRQL instruments. There were some statistically significant changes within groups compared to baseline. The intervention group improved self-rated swallowing function on the MDADI at 8 weeks (emotional domain, p = 0.03; functional domain, p = 0.007; total score, p = 0.01) and the control at twelve months (emotional domain, p = 0.03; functional domain, p = 0.02; physical domain, p = 0.004; total score, p = 0.002). CONCLUSION: In this randomized control study, no effect was observed short term or at 12 months on HRQL after use of the HLE as rehabilitation for radiation-induced dysphagia.

A pilot study using pre-treatment physical activity level to predict long-term health-related quality of life in patients with head and neck cancer.

BACKGROUND: Pre-treatment levels of physical activity (PA) in head and neck cancer (HNC) are rarely evaluated using accelerometry. This study aimed to investigate whether pre-treatment PA level in HNC predicts aspects of long-term health-related quality of life (HRQL) at 12 months after end of treatment. METHODS: This pilot study included 48 patients diagnosed with HNC, 41 participants remaining at 12 months post-treatment. Pre-treatment PA was objectively assessed by an accelerometer. Self-perceived PA and HRQL were assessed pre-treatment and at 6- and 12-months post-treatment. RESULTS: Patients with a higher pre-treatment PA level scored higher on physical function and role function and less fatigue and pain at the 12 months follow-up compared to patients with a lower pre-treatment PA. At 6 months the groups differed only on physical functioning. When comparing changes over time, there were statistically significant differences comparing high and low pre-treatment PA in the fatigue and pain domains between 6 and 12 months. Exploratory multiple regression analyses also indicated that higher pre-treatment PA levels were associated with greater favorable change in the four HRQL measures. CONCLUSIONS: Higher levels of PA assessed with accelerometer before oncologic treatment associated favorably with aspects of self-perceived HRQL and PA over time in patients with HNC.

Trismus, health-related quality of life, and trismus-related symptoms up to 5 years post-radiotherapy for head and neck cancer treated between 2007 and 2012.

PURPOSE: Radiotherapy-induced trismus is present in up to 40% of patients treated radiotherapeutically for head and neck cancer (HNC) and impacts health-related quality of life (HRQL) negatively. This prospective study aimed to investigate the development of trismus and its influence on HRQL and trismus-related symptoms in HNC patients for up to 5 years post-radiotherapy completion as no such follow-up studies exist. METHODS: Patients (n = 211) were followed prospectively from pre-radiotherapy to 12 and 60 months post-radiotherapy. At each follow-up, maximum interincisal opening (MIO) was measured, and patients filled in the European Organization for Treatment of Cancer Quality-of-Life Questionnaire Core-30 (EORTC QLQ-C30), Head and Neck-35 (EORTC QLQ-HN35), and Gothenburg Trismus Questionnaire (GTQ). Trismus was defined as an MIO ≤ 35 mm. RESULTS: At 1 year post-radiotherapy, a total of 27% met the trismus criterion, and at 5 years post-radiotherapy, the corresponding figure was 28%. Patients in the trismus group scored significantly worse compared to the patients without trismus on 8/15 domains at 1 year post-radiotherapy on EORTC QLQ-C30, further worsening in 11/15 domains at 5 years post-radiotherapy. Similar results were found for EORTC QLQ-HN35. Patients with trismus reported more trismus-related symptoms according to the GTQ at both timepoints compared to those without trismus. CONCLUSION: This study highlights that HNC patients suffering from radiotherapy-induced trismus report poorer HRQL and more trismus-specific symptoms compared to patients without trismus. These differences persist and increase up to at least 5 years following treatment completion. Hence, our results highlight that radiotherapy-induced trismus affects long-term HRQL, jaw symptoms, and pain, further stressing the need for early and structured intervention.

A 5-year prospective study of health-related quality of life in irradiated head and neck cancer patients: three trends of HRQL over time.

PURPOSE: Head and neck cancer (HNC) is one of the fastest increasing cancer-types, where both disease and oncologic treatment have severe impact on health-related quality of life (HRQL). This study aimed to report HRQL prospectively up to 5-years following radiotherapy-treatment in HNC and to, if possible, identify trends in HRQL over time. METHODS: This prospective study followed 211 patients receiving curatively intended radiotherapy pre-diagnosis, 3-, 6-, 12- and 60-months post-radiotherapy completion. HRQL was measured using EORTC QLQ-C30 and EORTC QLQ-HN35. RESULTS: A deterioration three months post-radiotherapy was reported in 14/15 domains of EORTC QLQ-C30. Eight out of 12 domains had recovered to baseline-values at 12 months post-radiotherapy and remained unchanged up to study endpoint. Corresponding figures for EORTC QLQ-HN35 were deteriorations in 15/16 domains at three months post-radiotherapy, with recovery of 5 domain at 12-months, whereas the other 11 domains remained significantly worse at 5-years post-RT compared to baseline. CONCLUSION: Following the deterioration in HRQL seen immediately following radiotherapy, the continued course of HRQL can be divided into three trends: short-term deterioration, long-term deterioration and long-term improvements. The combination of disease- and diagnosis-specific questionnaires is crucial when assessing HRQL in the HNC population.

Voice Outcomes Following Head-Lift Exercises in Head and Neck Cancer: A Randomized Controlled Study.

OBJECTIVES: This prospective randomized study aimed to investigate whether patients with dysphagia after treatment for head and neck cancer improve their vocal function from doing head lift exercises (Shaker's exercise). METHODS: Patients were randomized into an intervention group (n = 24) or a control group (n = 26). Patients in the intervention group performed the head lift exercise three times a day for 8 weeks. At baseline and at follow-up after 8 weeks, participants' voices were evaluated perceptually with the Grade-Roughness-Breathiness-Asthenia-Strain (GRBAS) scale. Vocal fry (VF) was also perceptually evaluated and patients filled in the Voice Handicap Index (VHI). RESULTS: Patients in the intervention group were perceptually evaluated as having less roughness and vocal fry in their voices at follow-up compared to the control group. There were no statistically significant changes between baseline and follow-up neither in the intervention nor the control group regarding GRBAS, VF, or VHI. Neither were there any statistically significant differences within the groups when results on the perceptual evaluations at baseline and follow-up were compared. CONCLUSIONS: The voices of the participants in the intervention group were slightly better than the voices of the participants in the control group with less roughness and VF at follow-up. However, no improvement in the VHI or the remaining GRBAS variables was found. Therefore, this study can only give cautious support to the head lift exercise as a method for improving the voice of patients with dysphagia after treatment for head and neck cancer.

Treatment with head-lift exercise in head and neck cancer patients with dysphagia: results from a randomized, controlled trial with flexible endoscopic evaluation of swallowing (FEES).

BACKGROUND: This randomized study aimed to evaluate the effects of the Shaker head-lift exercise (HLE) to improve dysphagia following oncologic treatment for head and neck cancer (HNC). METHODS: Patients with dysphagia following oncologic treatment for HNC were randomly assigned to intervention (n = 23) or control (standard dysphagia management, n = 24) groups. Swallowing was evaluated at baseline and at 8-week follow-up using flexible endoscopic evaluation of swallowing (FEES) and self-perceived swallowing with the Eating Assessment Tool (EAT-10). Analysis was performed regarding secretion, initiation of swallow, residue after swallowing, and penetration/aspiration. RESULTS: Few statistically significant differences were found in the FEES analysis. Some improvement of self-perceived swallowing function was found in both groups. Adherence to training was high. CONCLUSIONS: This randomized study regarding the effect of the HLE demonstrated that swallowing outcome measures used in assessment of FEES did not improve in patients treated with radiotherapy for patients with dysphagia following HNC.

A prospective 5-year study of trismus prevalence and fluctuation in irradiated head and neck cancer patients.

BACKGROUND: Trismus is a complication post-radiotherapy for head and neck cancer (HNC), which causes pain, eating limitations and reduced quality-of-life. However, little is known about the condition long-term or how trismus fluctuates within an irradiated population. AIM/OBJECTIVE: To prospectively map trismus prevalence in irradiated HNC patients up to 5-years following treatment completion including describing intra-group fluctuation of maximum interincisal opening (MIO). MATERIALS AND METHODS: 211 patients receiving curatively intended radiotherapy for HNC were included in this prospective study. Patients were followed pre-radiotherapy (baseline), 3-, 6-, 12-, 24-, 36- and 60-months post-radiotherapy completion using MIO. RESULTS: Mean MIO at baseline, 12-months and 5-years following radiotherapy were 51.5 mm, 41.7 mm and 41.3 mm respectively. A total of 28% (n = 36) fulfilled the trismus criterion at 5-years post-radiotherapy. Eighty percent of patients (n = 24) with trismus at 5 years post-radiotherapy also suffered from trismus at 12 months post-radiotherapy, whilst 88-92% of all patients reported reduced MIO at any given timepoint compared to baseline. 15% of patients never exceeded an MIO of >35 mm at any time-point. CONCLUSION: Trismus is a prevalent long-term complication of HNC and its treatment, which does not appear to heal spontaneously. The majority of fluctuations in MIO occur during the first 12 months post-radiotherapy completion.

Effects of oral screen exercise on orofacial and pharyngeal activity: An exploratory study using videofluoroscopy and surface electromyography in healthy adults.

OBJECTIVE: The oral screen is a device commonly used for treatment of orofacial disorders. The objective of this exploratory study was to examine the effect of oral screen exercise on the muscle activity in the lips, submental complex, masseter muscle, and kinematic activity of the tongue base, soft palate, pharynx, and larynx in healthy adults. This was compared with the kinematic activity during a dry swallow. It was hypothesized that not only the lip musculature but also other structures in the oral and pharyngeal cavities are activated while using an oral screen device. METHOD: Ten healthy subjects used an oral screen during examination with videofluoroscopy and surface electromyography (EMG). Three different instructions for oral screen application and a dry swallow were examined. RESULTS: The lip muscles showed the highest activity during oral screen exercise. The other muscle groups were activated to a lesser degree. The pattern of activation differed between individuals. Compared with a dry swallow, the range of motion of the tongue base, posterior pharyngeal wall, and the larynx was significantly smaller during oral screen activation. No major differences were found between three different instructions. CONCLUSION: This study indicates that the lips and submental complex and, to a lesser degree, oral, pharyngeal, and laryngeal structures are activated with the oral screen, but the pattern of activation varied between individuals. In comparison to the activity during a dry swallow, range of motion during oral screen exercise is small.

The effect of the Shaker head-lift exercise on swallowing function following treatment for head and neck cancer: Results from a randomized, controlled trial with videofluoroscopic evaluation.

BACKGROUND: Dysphagia is common following treatment for head and neck cancer (HNC) and intervention to improve swallowing function is warranted. This study aimed to evaluate the efficacy of the Shaker head-lift exercise (HLE) to improve dysphagia in HNC patients. METHODS: Patients treated for HNC with radiochemotherapy and with subsequent dysphagia were randomly assigned to intervention (HLE, n = 25) and control (standard dysphagia management, n = 27) groups. Videofluoroscopic evaluation of penetration-aspiration, initiation, residue, movement of selected structures, and self-perceived swallowing function, before and after 8 weeks of treatment, were compared. RESULTS: Although adherence to training was high, no statistically significant differences in objectively measured swallowing function between the groups or within-group changes were found. Self-perceived swallowing function improved in the intervention group. CONCLUSIONS: In this HNC population, neither HLE nor standard dysphagia management improved objectively measured swallowing function as evaluated after 8 weeks. Future research focusing on finding effective interventions for dysphagia is warranted.

Validation of the Swedish Watson Dysphagia Scale for adult patients with eosinophilic esophagitis.

BACKGROUND: The Swedish Watson Dysphagia Scale (S-WDS) has been used to assess dysphagia in patients with eosinophilic esophagitis (EoE) but has not been validated for this patient group. The aim of this study was to validate the S-WDS for adult patients with EoE. METHODS: Ninety-seven Swedish adult patients with EoE and 97 controls without dysphagia filled out the S-WDS, the Swedish Eosinophilic Esophagitis Activity Index (S-EEsAI) and a set of supplementary questions. The reliability of the S-WDS was evaluated using Cronbach's alpha, Pearson correlation of items and total score, and test-retest analysis (n = 29). Validity was investigated using Spearman correlations of the S-WDS items, S-EEsAI domains and a self-assessment score, and by investigating floor and ceiling effects. RESULTS: The Cronbach's alpha of the S-WDS was 0.77 and all items demonstrated moderate to strong correlation to the S-WDS score (r = 0.40-0.81) indicative of sufficient reliability of the instrument. In addition, the test-retest results reflected excellent reliability with an intraclass correlation coefficient of 0.85 for the S-WDS score. Adequate validity of the instrument was demonstrated, the S-WDS score correlated moderately with the self-assessment score and with 4/6 S-EEsAI domains, and strongly with the remaining two domains. Floor effects were more common for liquids and soft-textured foods and ceiling effects increased with increasing food consistency. The S-WDS scores of the patient group were significantly different from those of the nondysphagia control group (P < 0.001). CONCLUSION: The S-WDS instrument is an appropriate and valid instrument for assessment of dysphagia in patients with EoE.