Mealtime Assessment Scale-p Adaptation and Validation

The study is developed in 3 phases, replicating the validation process of the original version of the MAS scale validated on the adult population, based on the studies of Hansen et al.

1 Phase - adaptation of the scale to its use in pediatric settings. The first part of the study will be aimed at performing an adaptation of the original version of the MAS scale to the pediatric population by a multidisciplinary team consisting of physicians specializing in Physical Medicine and Rehabilitation, speech pathologists, and clinical psychologists.

The MAS consists of an initial section devoted to the collection of biographical and anamnestic data. It is then divided into four subscales: 1. Structures, functions and activities that influence eating, 2. Environmental factors that influence eating, 3. Safety of swallowing during eating, 4. Efficacy of swallowing during eating, for a total of 26 items. The score of each item is calculated from 0 (normal) to 3 (severely impaired).

The scale includes a section for calculating the score and a final supplementary section without scoring concerning the need for patient compensation and cues, which is intended to provide qualitative, not quantitative, descriptive information.

It is possible to calculate a partial score obtained at the subscales concerning Safety and Swallowing Effectiveness given by the sum of the scores at the relevant items, which can be expressed as a percentage value, to facilitate quantification of the level of impairment in these aspects. The higher the score or percentage, the lower the safety and effectiveness of swallowing during the meal. The time of intake of the same is also specified.

This study aims to maintain this structure and scoring system also in adapting the scale for the pediatric population (MAS-p).

Some items will be added, modified or removed according to the physiological characteristics of the pediatric subject, in particular it is deemed necessary to include an item exploring teething with its different characteristics according to life periods, an item for sucking if it is still present. Items will be removed if they are not applicable or not explorable in the test population, such as short-term memory. An initial review of the modified scale will be discussed by the multidisciplinary team in order to assess the comprehensibility of the proposed items.

Phase 2 - preliminary study At the end of the scale modification and adaptation process, a preliminary study of the psychometric properties of the pediatric version of the scale will be carried out through a pilot study in order to confirm the validity of the structure of the new scale, to study its internal consistency, intra- and inter-rater reliability, and finally the discrimination index.

A sample of 40 subjects was identified for the validation pilot study, aged between 24 months and 18 years, recruited on an outpatient and inpatient basis from paediatric rehabilitation department of the Don Carlo Gnocchi Foundation in Florence, Meyer Hospital in Florence, Don Carlo Gnocchi Foundation in Falconara.

Each recruited patient will be observed during the consumption of an entire meal by an experienced speech therapist informed of the protocol, in the presence of the caregiver. If the patient is not suitable due to age or pathology to perform this task independently, the administration of the meal will be entrusted to the caregiver, in an attempt to observe the patient in as ecological a setting as possible, as much superimposed on the context of family life in which the meal takes place daily. For this purpose, it will also be proposed to the patient to feed himself, in addition to the personal utensils used at home, with foods of his liking, usually included in his own diet.

The duration of administration of the scale, by the speech therapist assigned to the role of observer, will depend on the time it takes the test subject to eat a meal (on average between 30 and 45 minutes). Finally, it will take 4 to 5 minutes to complete the scoring section.

For the first 10 of the 40 patients recruited, observation will be conducted by two independent operators, experts in the protocol, who will fill out the scale blind to each other in order to test inter-operator reliability.

Intra-operator reliability will be studied by administration by the same operator to the subject 48 hours after the first assessment, in order to limit possible bias due to a change in the patient's clinical condition.

A second review of the scale by the multidisciplinary team, previously described, will therefore be carried out in order to discuss and possibly further modify the items that make up the scale.

Phase 3 - validation of the MAS-p scale. This phase aims to validate the pediatric version of the MAS scale on a larger group of patients.

A sample of 200 subjects has been identified, based on the studies of Hansen et al. and the validation study of the original version of the MAS scale. The recruited subjects will be divided into groups as follows.

Group 1: sample of 100 subjects not at risk for swallowing disorders as a control group.

Group 2: sample of 100 subjects at risk of swallowing disorders, with different underlying pathology, who tolerate full or partial oral meal intake.

Group 3: 36 patients with suspected dysphagia, selected in Group 2, for whom dietary modification is expected during the period of hospitalization.

During the meal, the evaluator may talk to the patient, encourage the patient to complete the meal, or ask for specific tasks necessary to complete the MAS-p (e.g., opening the mouth to assess post-swallow residuals in the oral cavity), but will not want to propose any additional requests nor can dietary instructions be given unless necessary for patient safety. No special/facilitative position will be asked. Each patient will be allowed to choose the food to eat, respecting any consistency constraints indicated by previous swallowing assessments. The assessment will be considered completed once the meal is finished. Each patient will be assessed at mealtime by two experienced speech therapists, informed of the protocol: scores obtained at MAS-p will be recorded independently and blinded to each other, to study inter-operator reliability. The assessment will be repeated after 48 hours, a time considered optimal in order to avoid possible bias related to the clinical improvement of the patient undergoing rehabilitation treatment, by one of the two speech therapists in order to study intra-operator reliability.

In group 3, i.e., those hospitalized patients who will be identified as suitable for diet modification during speech therapy, an endoscopic evaluation by videofluorographic swallowing study (VFSS), the gold standard for instrumental assessment of dysphagia, will be performed in advance by trained personnel before diet modification in order to verify that patients can tolerate a diet of different consistency; in this case, the observation of speech therapists during the meal and the completion of the MAS-p will be conducted both before (time 0) and after (time 1) the modification of the dietary pattern; thus the responsiveness of the scale will be assessed.

Regarding construct validity, the results of the scale will be compared with the results of two reliable and validated instruments for the assessment of dysphagia in pediatric settings, namely Montreal Children's Hospital Feeding Scale (MCH-FS) and Oral Motor Assessment Scale (OMAS), administered at the same time as the patient's first assessment by a speech therapist.