Reliability and validity of the Turkish voice handicap index-partner (VHI-P-TR).

OBJECTIVE: This study examines the Turkish validity, reliability and diagnostic performance of the Voice Handicap Index-Partner (VHI-P-TR), which is used to obtain the perceptions of communication partners of individuals with dysphonia about the functional, physical and emotional handicap resulting from the patient experiencing dysphonia. METHOD: The study included 160 individuals with dysphonia and their communication partners. First, translation, back translation, expert validity and pilot study were performed in the scale adaptation process. Then, a confirmatory factor analysis (CFA) was conducted to assess the construct validity of the VHI-P-TR. Correlations between the VHI-P-TR and Voice Handicap Index (VHI-TR) scores of dysphonic individuals were examined to evaluate the concurrent validity of the VHI-P-TR. To assess the reliability of the VHI-P-TR, a test-retest analysis was performed, and internal consistency coefficients (α) were calculated. A receiver operating characteristic (ROC) analysis was conducted to determine the cut-off point for the VHI-P scores. RESULTS: A high positive correlation was found between the participants' VHI-P-TR and VHI-TR total and subscales mean scores (r's > 0.782; p < 0.01). The VHI-P-TR had high internal consistency regarding for its subscales and total score (α's > 0.94; p < 0.01). Factor loadings of all VHI-P-TR items were higher than 0.30 and their error variances were lower than 0.90. In addition, factor loadings were statistically significant for all the items (p < 0.05). The data fit the model well according to all CFA indices except for GFI (scale = 0.69). An adequate sensitivity and specificity were achieved for the VHI-P-TR, and the cut-off point was found as 11.50 for the total score and ranged from 2.50 to 5.50 for the subscales. CONCLUSION: The VHI-P-TR is a valid and reliable measurement tool with high diagnostic performance in all subscales and total score, and has high levels of agreement with the VHI-TR.

Patient-Reported Outcome Measures in Voice: An Updated Readability Analysis.

PURPOSE: The purpose of this study was to investigate whether voice-related patient-reported outcome measures (PROMs) developed and validated since 2011 meet the recommendation by health literacy experts that such materials be written at a fifth-to-sixth grade reading level. METHOD: A readability analysis of eight voice-related PROMs was conducted. Readability formulas utilized were the Coleman-Liau index, Flesch-Kincaid reading ease, FORCAST, simple measure of Gobbledygook index, and Gunning-Fog score. RESULT: Three-fourths of the PROMs exceeded the recommended fifth- to sixth-grade reading level. CONCLUSION: Although awareness of health literacy has grown, voice-related PROMs continue to be developed without full consideration of their reading grade level. Researchers should consider revising or developing PROMs with consideration to reading grade level as well as other features to enhance readability.

A randomized controlled trial of the effects of flow phonation voice treatment for primary muscle tension dysphonia.

OBJECTIVE: The purpose of the study was to investigate the effects of flow phonation voice therapy on laryngeal physiology and vocal quality in persons with primary Muscle Tension Dysphonia (MTD1). METHODS: Seventeen participants with a diagnosis of MTD1 completed the study. Participants were randomized to two groups. Group 1 (9 participants) received flow phonation treatment and individualized vocal hygiene education for 12 sessions over six weeks. Group 2 (8 participants) received vocal hygiene education only for three weeks (6 sessions), followed by another three weeks (6 sessions) of both vocal hygiene instruction and flow phonation therapy. Treatment consisted of cup-bubble blowing, gargling, and stretch and flow exercises. Visual-perceptual. auditory-perceptual, acoustic, aerodynamic and voice-related quality-of-life measures were obtained at three time points: before treatment, three weeks after initiation of treatment and after completion of treatment. RESULTS: Voice quality was perceived to be significantly improved in both groups. Voice related quality-of-life trended toward improvement for both groups across time points. Changes in aerodynamic and acoustic measures did not reach statistical significance compared to baseline for both groups. Visual comparisons of laryngeal closure patterns demonstrated comparably better outcomes for Group 1. CONCLUSIONS: Results of this study indicate flow phonation exercises can potentially be favorably employed for individuals with MTD1. In particular, it appears that the exercises aid in alleviating vocal hyperfunction, as evidenced by visual perceptual stroboscopic analysis, and clinically improved auditory-perceptual measures.

Readability of Individuals With Disabilities Education Act Part B Procedural Safeguards Notices Written in Spanish.

PURPOSE: The purpose of this study was to analyze the readability of the Individuals with Disabilities Education Act (IDEA) Part B procedural safeguard notices written in Spanish, as distributed by each of the 50 states in the United States and the District of Columbia. Results were compared with the 6th-8th grade document readability guideline recommended by experts in health communication. METHOD: A commercially available readability software program was used to assess document readability using three readability indices: the Gilliam-Peña-Mountain Graph, SOL, and the Fry Readability Adaptation for Spanish Evaluation. RESULTS: All procedural safeguard notices were written at a reading grade level greater than established guidelines. This finding agrees with research that has examined the readability of English-language versions of IDEA Part B procedural safeguard notices. CONCLUSIONS: Literacy-related skills and demands may influence the ability of the parent to advocate on behalf of his or her child with a disability within the school setting. Educators and specialists should be sensitive to parent reading preferences and proficiency when reviewing IDEA procedural safeguards notices. Authors of procedural safeguard notices should account for the native language and culture of the intended reader as revisions to, and translations are made of, IDEA procedural safeguards notices.

Assessment of Online Patient Education Material About Dysphagia.

To examine quality, readability, understandability, and actionability of English-language online educational materials about dysphagia. A Google search of "dysphagia" and related terms was conducted. Web page quality and accountability were measured using HON and URAC certification seals, the DISCERN instrument, and JAMA benchmark criteria. Understandability and actionability were assessed with the Patient Education Materials Assessment Tool for Printed Material (PEMAT-P). Readability was assessed using the Flesch Reading Ease (FRE), Flesch-Kincaid Grade Level (F-KGL), Gunning Fog (FOG), and the Simple Measure of Gobbledygook (SMOG) scores using dedicated readability software. Fifty web pages were analyzed. Seventeen web pages displayed a HON or URAC seal. DISCERN scores ranged from 17 to 50 (Mdn = 25.00; IQR = 32.25-21.00). Of the JAMA benchmark criteria, 88% of web pages met the disclosure criterion, while only 22% met the authorship, 20% met the attribution, and 16% met the currency criteria. PEMAT-P understandability and actionability scores were 69.38% ± 11.14% and 28.58% ± 22.19%, respectively. Readability scores, on average, exceeded the recommended grade reading levels for health information (FRE 46.34 ± 13.59, F-KGL 10.26 ± 2.29, FOG 12.11 ± 2.08, and SMOG 12.38 ± 1.70). Online materials about dysphagia can be improved by obtaining quality certificates and by including content that is more readable and easier to understand and act upon.

Readability and Suitability of Information Presented on a University Health Center Website.

This study evaluated the readability and suitability of a university health center public website. Readability formulas estimated the reading grade and age required for comprehension of health information. The Suitability Assessment of Materials (SAM) instrument determined adequacy of the webpages for the intended audience. Readability showed the reading grade level, representing the youngest reader able to process the material, ranged from 10.1 to 14.6, averaging 12.5 (midway through 12th grade in the US educational system). Full comprehension required higher education levels, up to postgraduate. Suitability scores for some webpages indicated deficiencies in readability, motivation to learn, and instructions for healthy behavior changes. Content on the website may be difficult for some students to comprehend based on the reading grade level, but overall suitability results are satisfactory. All webpage updates should bear these parameters in mind to ensure content is fully accessible to college students, faculty, and staff.

Readability of Cochlear Implant Brochures: A Potential Factor in Parent Decision Making.

PURPOSE: The purpose of this study was to examine the ease of reading cochlear implant (CI) brochures provided to parents and caregivers who are making informed decisions about the management of their child's hearing loss. METHOD: CI brochures from three Food and Drug Administration-approved CI manufacturers were examined: Advanced Bionics, Cochlear Americas, and MED-EL. Reading grade levels and ease of reading were analyzed using a commercially available computer software program, applying six readability formulas commonly used to examine hearing-related patient education materials (PEMs). RESULTS: The readability of the CI brochures exceeds the fifth- to sixth-grade reading-level guidelines. The CI brochures may be difficult for the average English-speaking adult to read with ease and requires at least a 10th-grade comparable reading level. CONCLUSIONS: Despite health literacy initiatives, audiology-focused PEMs continue to be created without full consideration of the burden for the reader. Authors of PEMs should consider the average reading level of the reader as a variable potentially influencing the decision-making process. Likewise, clinicians should consider the average reading level needed to understand PEMs when presenting information and resources to parents and caregivers for informed and shared decision making.

The Effects of Self-Esteem, Coping, and Voice-Related Quality of Life on Communicative Participation Before and After BOTOX® Treatment for Spasmodic Dysphonia.

OBJECTIVES/HYPOTHESIS: The purpose of this study was to (1) investigate the percent change in communicative participation in individuals with spasmodic dysphonia (SD) pre- and post-BOTOX® treatment; and (2) to investigate if percent change in communicative participation is predicted by change in self-esteem, coping, and/or Voice-Related Quality of Life (V-RQOL) pre- and post-BOTOX® treatment. STUDY DESIGN/METHODS: A cross-sectional study of 49 patients was conducted across three clinics, with each participant completing the Rosenberg Self-Esteem Scale, the Voice Disability Coping Questionnaire (VDCQ), the V-RQOL instrument, and the Communication Participation Item Bank (CPIB) before BOTOX® treatment and 10-14 days following BOTOX® treatment. DATA ANALYSIS: For Research Question 1, a paired t test was applied to test the equality of means for CPIB and to test the pre-post changes among other composite measurements before and after the BOTOX® treatment. For Research Question 2, a multivariable linear regression model was applied with percent change in CPIB as a main outcome, and change in Rosenberg Self-Esteem Scale, VDCQ, and the V-RQOL as independent variables (or covariates) in order to test the associations. RESULTS: The results indicated that pre- and post-BOTOX® measures of communicative participation are not statistically significantly different among the participants with SD. There was a strong positive correlation between change in coping and voice-related QOL. CONCLUSIONS: A better understanding of the relationship between communicative participation and voice-related QOL is warranted. Item analysis of the V-RQOL and the VDCQ may illustrate coping strategies and functional impairments and provide further information regarding highly variable communicative participation among individuals with SD.

A Systematic Review of Voice-Related Patient-Reported Outcome Measures for Use with Adults.

PURPOSE: This paper's purpose is to provide a resource for clinicians and researchers of select voice-related patient-reported outcome measures (PROMs) available in the English language. METHOD: A systematic search for voice-related PROMs was conducted between September 2020 and July 17, 2021. Databases included APA PsychInfo, Nursing and Allied Health Source, MEDLINE via the EBSCO interface, and Science Direct. Reference lists for PROMs-related articles were mined for reference to PROMs protocols. RESULTS: Thirty voice-related PROMs were identified and categorized as either developed primarily for use in the clinic (n = 12), developed primarily for use in a specific research study (n = 6), or translated into English for publication (n = 12). Twelve PROMs were summarized: Aging Voice Index, Disease Specific Self-Efficacy in Spasmodic Dysphonia, Evaluation of the Ability to Sing Easily, Evaluating Voice Disability - Quality of Life Questionnaire, Glottal Function Index, Linear Analog Scale of Assessment of Voice Quality, Quality of Life in Recurrent Respiratory Papillomatosis, Speech Disability Questionnaire, Trans Woman Voice Questionnaire, Vocal Cord Dysfunction Questionnaire, Vocal Fatigue Index, and the Vocal Tract Discomfort Scale. CONCLUSION: The PROMs can be categorized into English-language voice-related PROMs developed primarily for clinical use, English-language PROMs developed primarily for research use, and English-language PROMs translated into English. The extent of reliability and validity testing completed varies in the PROMs developed primarily for clinical use. A PROM's psychometric properties as well as the language in which the PROM was tested, should guide clinicians and researchers as they consider which instrument(s) to use.

Quality and readability of internet information about stuttering.

PURPOSE: We examined the quality and readability of English-language Internet information about stuttering and evaluated the results considering recommendations by experts in health literacy. METHOD: A search of Internet websites containing information about stuttering was conducted. Three key words (i.e., stuttering, stammering, speech disfluency) were entered into five country-specific versions of the most commonly used Internet search engine. A total of 79 websites were assessed. Their origin (commercial, non-profit, government, personal or university), quality [Health On the Net (HON) certification and DISCERN scores], and readability [Flesch Reading Ease (FRE) score, Flesch-Kincaid Grade Level Formula (F-KGL), and Simple Measure of Gobbledygook (SMOG)] were assessed. RESULTS: Of the 79 websites, 38 % were of commercial, 42 % were of nonprofit organization, 15 % were of government and 5% were of university origins, respectively. Only 13 % had obtained HON certification and the mean DISCERN scores was 3.10 in a 5-point scale. The mean reading grade levels were at 13th and 14th grade and 100 % of the websites exceeded the recommended 5th to 6th reading grade level for health information. CONCLUSIONS: The quality of Internet-based health information about the treatment of stuttering is generally adequate, but actual usability of the sites examined in this study may be limited due to poor readability levels. This is problematic in persons with poor literacy skills. Since the Internet can be readily accessed as a valuable consumer information resource, speech-language pathologists and other healthcare professionals have an opportunity to direct consumers to websites that provide readable information of good quality.

An Investigation of the Relationship between Adherence to Voice Therapy for Muscle Tension Dysphonia and Employment, Social Support, and Life Satisfaction.

PURPOSE: The purpose of this study was to investigate whether a relationship exists between employment status, perception of life quality (ie, vocal impairment, health, life satisfaction, and social support), and adherence to voice therapy for persons with muscle tension dysphonia (MTD). This study extends recent work as it evaluates investigating the impact of social support and life satisfaction on adherence to voice therapy for MTD. METHOD: A cross-sectional study of 45 individuals diagnosed with MTD who participated in voice therapy between January 2014 and December 2015 at the University of Arkansas for Medical Science's Voice and Swallowing Center in Little Rock, Arkansas participated in this study. Participants provided information regarding employment status and completed the Satisfaction with Life Scale and the Quality of Relationships Inventory. RESULT: Sixty percent of participants completed voice therapy. Patients who completed voice therapy were more likely to report gainful employment (P = 0.038) or less confidence in a specific and significant personal relationship (P = 0.004). CONCLUSION: This study discovered a moderate effect between employment status and adherence to voice therapy for MTD as well as relationship confidence and adherence.

Readability of Individuals With Disabilities Education Act Part B Procedural Safeguards: An Update.

Purpose The purpose of this study was to analyze the readability of Individuals with Disabilities Education Act (IDEA) Part B procedural safeguard documents, as distributed by each of the 50 U.S. states. Results were compared to the 5th- to 6th-grade readability guideline for documents recommended by experts in health literacy and health communication. Method A commercially available readability software, Readability Studio ( Oleander Software, 2009 ), was used to assess document readability. Text-based files of each IDEA Part B procedural safeguard document were analyzed using four readability formulas: Flesch-Kincaid ( Flesch, 1965 ), Gunning fog index ( Gunning, 1952 ), Flesch Reading Ease ( Flesch, 1948 ), and Simple Measure of Gobbledygook ( McLaughlin, 1969 ). Results No procedural safeguard document scored below an 11th-grade reading level. Seventy-four percent of these documents were found to be written at a graduate reading level-meaning these documents are written for a reader who is currently enrolled in a master's degree or higher education program. Conclusion In an effort to decrease barriers to parent participation in the Individualized Education Planning process, those who administer IDEA Part B procedural safeguards should be sensitive to the potential mismatch between the literacy skills of the parent/guardian and the literacy skills needed to comprehend these documents. Developers of IDEA Part B procedural safeguards should account for estimated literacy skills of the general public as ongoing revisions to these safeguards are made.

Telepractice Versus In-Person Delivery of Voice Therapy for Primary Muscle Tension Dysphonia.

PURPOSE: The purpose of this study was to investigate the utility of telepractice for delivering flow phonation exercises to persons with primary muscle tension dysphonia (MTD). METHOD: Fourteen participants with a diagnosis of primary MTD participated, 7 on site and 7 at remote locations. Each participant received 12 treatment sessions across 6 weeks. Treatment consisted of flow phonation voice therapy exercises. Auditory-perceptual, acoustic, aerodynamic, and quality-of-life measures were taken before and after treatment. RESULTS: Perceptual and quality-of-life measures were significantly better posttreatment and were statistically equivalent across groups. Acoustic and aerodynamic measures improved in both groups, but changes did not reach statistical significance. Results for the 2 service delivery groups were comparable, with no significant differences observed for perceptual and quality-of-life measures. CONCLUSIONS: Although the American Speech-Language-Hearing Association supports the use of telepractice for speech-language pathology services, evidence for the use of telepractice for providing behavioral treatment to patients with MTD has been lacking. The results of this study indicate that flow phonation exercises can be successfully used for patients with MTD using telepractice.

A need for health literacy curriculum: knowledge of health literacy among U.S. audiologists and speech-language pathologists in Arkansas.

CONTEXT: We assessed the general knowledge of health literacy and the impact of limited health literacy on patients and to society in United States (US) audiologists and speech-language pathologists in Arkansas. METHODS: A 10-item survey was completed by 198 professionals and students in communication sciences and disorders in Arkansas. The 10-items were divided into one demographic question, six patient-related health literacy questions, and three systems-related health literacy questions. RESULTS: Most professionals and students were aware that limited health literacy can be an obstacle for patients, but they were only somewhat or not aware of existing data on the average US adult reading grade level, the readability of clinic forms, or the estimated economic healthcare cost as a result of low health literacy. DISCUSSION: Increasing the awareness of health literacy and the impact of limited health literacy among all healthcare providers would be a worthwhile endeavor. More work is needed to study health literacy in various patient populations and to develop effective approaches to combat low health literacy in the field of communication sciences and disorders, as well as other healthcare disciplines, across the globe. This study suggests that health literacy awareness training may be needed, not only in Arkansas, but also throughout the US and other countries. The outcome should bridge the health literacy and communication gap between providers and their patients.

Readability of questionnaires assessing listening difficulties associated with (central) auditory processing disorders.

PURPOSE: Eight English-language, student- or parent proxy-administered questionnaires for (central) auditory processing disorders, or (C)APD, were analyzed for readability. For student questionnaires, readability levels were checked against the approximate reading grade levels by intended administration age per the questionnaires' developers. For proxy questionnaires, results were compared to the reading grade level for the average U.S. adult and the minimum 5th- to 6th-grade reading level for health materials as recommended by adult health literacy experts. METHOD: This was a descriptive study that was based on the results of a commercially available readability calculations software package. Text-based files of the 8 questionnaires were analyzed using 3 readability formulas: FORCAST ( Caylor & Sticht, 1973), Flesch Reading Ease (FRE; Flesch, 1948), and Gunning's Fog index (FOG; Gunning, 1952). RESULTS: The FORCAST formula, the most appropriate for nonnarrative-type materials, indicated that all 8 questionnaires were written at reading levels between the 8th and 10th grades. The FRE and FOG formulas, designed for narrative-type materials, were generally in good agreement with one another but varied widely between the upper 4th- and 12th-grade levels. CONCLUSION: In an effort to decrease respondent burden, developers should consider readability as another testable psychometric construct. Clinicians should take into account the functional health literacy skills of adult proxy respondents when giving self-administered questionnaires.

A computer-based readability analysis of patient-reported outcome questionnaires related to oral health quality of life.

OBJECTIVE: The purpose of this study was to examine the readability of published patient-related outcome (PRO) questionnaires completed by persons with oral disease and to compare the readability results to existing data about average reading levels for adults living in the United States. METHODS: A search was conducted via Pubmed and Google Scholar to identify PRO oral health-related questionnaires completed by patients. Reading grade levels were analyzed for 10 oral health-related PRO questionnaires using three readability formulas. RESULTS: The most significant results were as follows: CONCLUSION: Developers of PRO questionnaires should consider readability as another testable construct. PRACTICE IMPLICATIONS: To obtain the most useful information for treatment planning and outcomes assessments, the dental professional should consider the reading level needed to understand a particular PRO questionnaire.

Readability of patient-reported outcome questionnaires for use with persons who stutter.

OBJECTIVE: The purpose of this study was to examine the readability of several published patient-reported outcome (PRO) questionnaires for use with persons who stutter, and to compare the readability results to existing data about average reading levels for English-speaking adults living in the United States. DESIGN: Published PRO questionnaires were identified that are traditionally completed by persons who stutter in a self-administered format. METHOD: Reading grade levels were analyzed using the Flesch Reading Ease, FOG, and FORCAST formulas as computed by a readability calculations software package. Descriptive statistics were computed across the questionnaires. RESULTS: The results of this study demonstrate that many of the PRO questionnaires exceeded the fifth to sixth grade reading levels recommended by health literacy experts. CONCLUSIONS: The clinician should consider the average reading level needed to understand a particular PRO questionnaire when administering it to a patient or their proxy. Likewise, developers of PRO questionnaires should consider reading level of respondents and include information about this when reporting psychometric data. EDUCATIONAL OBJECTIVES: The reader will get an overview over the literature on patient-reported outcome (PRO) questionnaires and their use with persons who stutter and will be able to: (1) define readability, (2) describe how reading levels are determined for a given PRO questionnaire, (3) list the strengths and limitations of readability assessment in the evaluation of persons who stutter and (4) analyze the role of readability assessment in future PRO questionnaire development.

Readability of patient-reported outcome questionnaires for use with persons with dysphonia.

OBJECTIVES: The purpose of this study was to examine the readability of several published patient-reported outcome (PRO) questionnaires for persons with dysphonia, and to compare the readability results with existing data about average reading levels for English-speaking adults living in the United States. DESIGN: A search was conducted to identify published PRO questionnaires related to dysphonia that are traditionally completed by patients in a self-administered format. METHOD: Reading grade levels were analyzed separately for 12 different voice-related PRO questionnaires using the Flesch Reading Ease, FOG, and FORCAST formulas as computed by a readability calculations software package. Descriptive statistics were also computed across the questionnaires. RESULTS: The results of this study demonstrate that most PRO questionnaires exceeded the fifth- to sixth-grade reading levels recommended by health literacy experts regardless of the formula applied. CONCLUSIONS: In the demand for standardization of voice-related quality of life assessment tools, developers should consider readability as another testable construct because poor readability may affect validity, reliability and sensitivity. The voice clinician should consider the average reading level needed to understand a particular PRO questionnaire when administering it to a patient or their proxy. Developers of PRO questionnaires should consider reading level of respondents and include information about this when reporting psychometric data.

Adult normative data for the KayPENTAX Phonatory Aerodynamic System Model 6600.

OBJECTIVES: The primary purpose of the present study was to establish a preliminary adult normative database for 41 phonatory aerodynamic measures obtained with the KayPENTAX Phonatory Aerodynamic System (PAS) Model 6600 (KayPENTAX Corp, Lincoln Park, NJ). A second purpose was to examine the effect of age and gender on these measures. DESIGN: Prospective data collection across groups. METHOD: A sample of 157 normal speakers (68 males and 89 females) were divided into three age groups (18-39, 40-59, and 60+ years). The PAS protocols of vital capacity, maximum sustained phonation, comfortable sustained phonation, variation in sound pressure level, and voicing efficiency were used to collect 41 phonatory aerodynamic measures. Comfortable pitch and loudness levels were used with each protocol requiring phonation. RESULTS: A statistically significant main effect of age was found for seven measures, and a statistically significant main effect of gender was found for five measures. The remaining 29 measures did not reach statistical significance; however, 13 of these had high observed power. The remaining 16 measures did not reach significance and had low observed power. CONCLUSIONS: Because age- and gender-related changes were found for some measures, one must account for these two variables when assessing phonatory aerodynamics using the PAS Model 6600. The clinical implications of the findings for the assessment and treatment of individuals with voice disorders using the PAS Model 6600 are discussed.

Readability of patient-reported outcome questionnaires for use with persons with swallowing disorders.

The purposes of this study were to examine the readability of published patient-related outcome (PRO) questionnaires for persons with swallowing problems, and to compare the readability results to existing data about average reading levels of English-speaking adults living in the United States. A search was conducted to identify published PRO questionnaires related to swallowing problems that traditionally are completed by patients in a self-administered format. Reading grade levels were analyzed separately for four different swallowing-related PRO questionnaires using the Flesch Reading Ease, FOG, and FORCAST formulas as computed by a readability calculations software package. Descriptive statistics were also computed across the questionnaires. The results of this study demonstrate that all four PRO questionnaires exceeded the fifth- to sixth-grade reading levels recommended by health literacy experts regardless of the formula applied. In the demand for standardization of swallowing-related quality-of-life assessment tools, developers should consider readability as another testable construct, since poor readability may affect validity, reliability, and sensitivity. The swallowing clinician should consider the average reading level needed to understand a particular PRO questionnaire when administering it to a patient or his or her proxy. Developers of PRO questionnaires should consider the reading level of respondents and include information about this when reporting psychometric data.