According to Gram Research analysis, a European Portuguese version of the SWAL-QoL questionnaire is a reliable and valid tool for measuring how swallowing problems affect quality of life in adults with neurological injury. In a 2026 study of 255 adults, its internal consistency reached 0.96 on a 0 to 1 scale.
Swallowing problems can make eating, drinking, and daily life much harder, especially after a stroke or other brain and nerve injuries. Until now, Portuguese speakers lacked a fully tested tool to measure how these problems affect quality of life. According to research reviewed by Gram, a team in Portugal tested a European Portuguese version of the SWAL-QoL questionnaire with 255 adults. The group included 85 people with neurological injury and swallowing trouble, 70 people with neurological injury but no swallowing trouble, and 100 healthy adults. The questionnaire gave consistent, repeatable results and clearly separated people who had swallowing problems from those who did not. Its scores also tracked with how restricted a person’s diet was. The findings suggest the tool may be useful for doctors, therapists, and researchers working with Portuguese-speaking patients.
Key Statistics
A 2026 case-control study of 255 adults found that the European Portuguese SWAL-QoL questionnaire had excellent internal consistency, with a total Cronbach’s alpha of 0.96.
In a 2026 study of 255 adults, people with neurological injury and swallowing problems scored significantly lower than those without swallowing problems in every quality-of-life area except sleep.
A 2026 study published in Dysphagia found that the two main factors in the Portuguese SWAL-QoL explained 69.2% of the differences in participants’ answers.
The Quick Take
- What they studied: The researchers wanted to know whether a Portuguese version of a swallowing quality-of-life questionnaire measures what it is supposed to measure, and whether it works accurately for adults with brain or nerve injuries that affect swallowing.
- Who participated: A total of 255 adults took part. Eighty-five had a neurological injury and trouble swallowing, 70 had a neurological injury without swallowing trouble, and 100 had neither. All were adults who speak European Portuguese.
- Key finding: The questionnaire was highly consistent, with a score of 0.96 on a 0 to 1 scale where higher means more consistent. People with swallowing problems scored lower in almost every area, except sleep. Their scores also dropped as their diets became more limited.
- What it means for you: If you or a loved one has trouble swallowing after a stroke or similar injury, this tool may help doctors and therapists understand how the problem affects daily life. It is a measurement tool, not a treatment, so it should be used alongside professional medical care.
The Research Details
The researchers compared three groups of adults: people with neurological injury and swallowing problems, people with neurological injury but no swallowing problems, and healthy adults with no nerve or brain disease and no swallowing complaints. Comparing groups like this helps show whether a questionnaire can tell people with and without a condition apart.
Everyone completed the Portuguese SWAL-QoL questionnaire, which asks about how swallowing affects daily life, such as eating, drinking, mood, and social activities. The two neurological groups also completed the Functional Oral Intake Scale, a short rating of how much and what kinds of food and drink a person can safely take by mouth. These patients also had a standard clinical swallowing exam.
To test the questionnaire, the team checked whether its questions hung together logically, whether people gave similar answers when asked again later, and whether the scores matched other measures and clinical findings. They also looked at how scores changed with different food and liquid textures.
Comparing groups with and without the condition is a practical way to see whether a questionnaire can detect real differences. Retesting the same people shows whether the results are stable over time. Matching the questionnaire to a clinical rating scale and to diet restrictions adds more evidence that it measures real-world effects. Together, these steps make the results more trustworthy than a single test would.
The study followed established methods for checking questionnaires, and the sample was large enough to produce reliable statistics. The results were consistent across several different tests. However, the study looked at one moment in time for most participants, so it cannot show how the questionnaire would perform over long periods or in every type of patient. Readers should also keep in mind that the study was published in a peer-reviewed scientific journal, which means other experts reviewed it before publication.
What the Results Show
The Portuguese SWAL-QoL showed excellent internal consistency, meaning its questions worked together well. The total score had a value of 0.96, and the individual sections ranged from 0.72 to 0.97. Scores were also stable when people completed the questionnaire again later, with values from 0.75 to 0.96. This suggests the tool gives dependable results from one time to the next.
The researchers also found that the questions grouped into two main themes. One theme related directly to swallowing and eating. The other related to general quality of life. Together, these two themes explained about 69.2% of the differences in people’s answers, which suggests the tool captures both the physical and everyday effects of swallowing problems.
The questionnaire also separated people with swallowing trouble from those without it. Dysphagic participants scored significantly lower in every area except sleep. Scores also dropped as people’s diets became more restricted, such as moving from regular food to only pureed food or thin liquids. This pattern suggests the tool reflects real differences in how swallowing problems affect people.
The questionnaire’s scores showed a moderate match with the Functional Oral Intake Scale (correlation of 0.43). A moderate match means the two tools overlap, but they also measure different things, which is expected because one focuses on what people can eat and the other on how they feel about their lives.
The questionnaire’s sections were closely related to each other, with correlations between 0.72 and 0.96. This means the sections were connected but still distinct. Overall, these findings support the idea that swallowing problems influence many parts of a person’s life, not only eating.
The original SWAL-QoL is an English-language tool that has been used widely in research on swallowing problems. This study adapts and tests a version for European Portuguese speakers, which fills a gap because no fully validated tool previously existed for this group. The results are in line with how similar questionnaires have performed in other languages, though direct comparisons across studies should be made with care.
The study was cross-sectional, meaning it captured information at one point in time for most participants. This makes it hard to know whether the questionnaire would detect improvements or declines as patients recover or get worse. The study included only European Portuguese speakers, so results may not apply directly to Brazilian Portuguese speakers or to people with other languages or cultures. The moderate match with the Functional Oral Intake Scale also means the questionnaire measures something different from diet ability alone. Finally, the study did not test whether using the questionnaire improves patient outcomes, only whether it measures accurately.
The Bottom Line
Research shows that this European Portuguese SWAL-QoL is a reliable and valid tool for measuring how swallowing problems affect quality of life in adults with neurological injury. Confidence in this recommendation is high for its measurement accuracy, but moderate for how it could change patient care, because the study did not test treatment outcomes. Clinicians may consider using it alongside standard swallowing exams and diet assessments.
Doctors, speech-language therapists, dietitians, nurses, and researchers who work with Portuguese-speaking adults with swallowing problems after stroke or other brain and nerve conditions should find this useful. People with swallowing trouble and their families may also find the questionnaire helpful for describing their experiences. People without swallowing problems or without neurological conditions do not need this tool. Anyone who is not a Portuguese speaker should look for a version validated in their own language.
A questionnaire like this is a measurement tool, so its benefits show up in how well care is planned and tracked rather than as a direct health change. Clinics may begin using it within months if they choose to adopt it. Any real improvement in patient quality of life would depend on the treatment plans that follow, and those results would need separate studies to confirm.
Frequently Asked Questions
Is there a validated quality of life questionnaire for swallowing problems in Portuguese?
A 2026 study validated a European Portuguese version of the SWAL-QoL questionnaire in 255 adults. It showed excellent internal consistency, with a score of 0.96, and it reliably separated people with swallowing problems from those without them.
How does swallowing trouble affect quality of life after a stroke?
Swallowing problems after neurological injury can affect eating, drinking, and daily activities. A 2026 study found that people with these problems scored significantly lower on quality-of-life measures, except in sleep, than people without swallowing trouble.
What is the SWAL-QoL questionnaire used for?
The SWAL-QoL is a questionnaire that measures how swallowing problems affect a person’s daily life, including eating, mood, and social activities. Researchers and clinicians use it to track patient experiences and plan care.
Can a swallowing questionnaire tell how restricted a person’s diet is?
Yes-style answers aside, the 2026 study found that SWAL-QoL scores became lower as diet textures became more restricted. This suggests the tool reflects real differences in how swallowing problems affect everyday eating and drinking.
Want to Apply This Research?
- Track your score on a validated swallowing quality-of-life questionnaire once a month, along with a simple log of which food and drink textures you can eat comfortably each week. Note any changes of 5 points or more on the total questionnaire score, as this may signal a meaningful shift in daily life. Share the results with your care team.
- Use the app to log meals and note which textures feel safe and comfortable. Set reminders to follow your therapist’s swallowing exercises and diet guidance. Record how each meal feels, such as coughing, throat clearing, or fatigue, so you can discuss patterns with your clinician.
- Over the long term, complete the questionnaire every three months or as advised by your care team, and compare results over time. Keep a running record of diet texture changes, medical appointments, and any new symptoms. Review trends together with your healthcare provider rather than making changes based on a single score.
This article summarizes a single research study and is for general information only. It is not medical advice. Swallowing problems can be serious, including risk of choking or pneumonia. If you or someone you care about has trouble swallowing, talk with a doctor, speech-language therapist, or other qualified healthcare professional before making changes to diet, medication, or treatment.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.