Participants
Patients with a radiologically suspected supratentorial low-grade glioma or meningioma, who were scheduled for resective surgery in the Elisabeth-TweeSteden Hospital Tilburg, were invited to participate. Patients who met any of the following criteria were excluded: history of intracranial neurosurgery, history of severe psychiatric or neurological disorder, diagnosis of multiple meningioma, complete unfamiliarity with the use of computers, lack of basic proficiency in Dutch, inability to undergo neuropsychological assessment due to motor/language/visual problems, Karnofsky performance score (KPS) below 70 or a premorbid IQ below 85. Patients who were referred to in- or outpatient cognitive rehabilitation were excluded as well. The projected sample size was 15. Informed consent was obtained from all individual participants included in the study.
Design and procedure
This single-arm pilot study was approved by the local medical ethical review board (METC Brabant: NL51152.028.14), registered in The Netherlands National Trial Register (NTR 5392).
Two weeks before surgery, patients were informed about the study by a nurse practitioner. Interested patients received an information letter. One day before surgery, patients were hospitalized and neuropsychological assessment (T0) was carried out as part of usual clinical care. At the beginning of the assessment, patients who were willing to participate in the study provided written informed consent. If patients chose to make use of the possibility to involve a significant other in the cognitive rehabilitation trajectory (see below), the significant other had to give informed consent as well. Three months after surgery, a second usual care neuropsychological assessment (T3) was conducted. Immediately afterwards, the cognitive telerehabilitation program ReMind commenced. Three months later (i.e. 6 months after surgery), after completing ReMind, the final neuropsychological assessment took place (T6) for the purpose of this study. Additionally, study-specific evaluation questionnaires were completed. The current study was embedded in standard clinical care provided by the hospital.
Intervention
The program
The cognitive telerehabilitation program Remind was developed in a joint patient/researcher initiative and is based on our previously evaluated face-to-face cognitive rehabilitation program [9, 12, 20]. The ReMind-app is provided via an iPad (Fig. 1a) and is available in both Dutch and English. In the current study, the Dutch version was used.
Similar to the original program [12], ReMind consists of compensation training, including psychoeducation and teaching of compensatory skills, and attention retraining (see Fig. 1b, c). In the compensation training, psychoeducation about cognitive functions is provided in six modules, namely on (1) Cognitive functions, (2) Influences, (3) Compensation, (4) Attention, (5) Planning & control, and (6) Memory. Additionally, in each module, compensatory strategies are taught and many exercises are included to learn to apply these strategies in everyday life. Patients learn, for example, to minimize distraction and deal with time pressure, and to optimally use external devices for support. Due to the strong interdependence of all cognitive functions, the strategy training was designed so that patients should go through all the six modules one by one, to benefit the most from the strategy training. Progression through each module is visualized, with checkmarks at the bottom of the screen (Fig. 1b).
In the retraining part, named C-Car, four different modes of attention are trained, namely sustained, selective, alternating and divided attention. It includes visual and auditory exercises, wherein both verbal and numeric stimuli are presented. All patients started with the same version of this training, independently of their pre-intervention neuropsychological scores. Series of hierarchically graded tasks were used, so that higher levels are reached, if previous levels are mastered. In this manner, the retraining is tailored to the level of the patient. After each exercise, patients receive feedback on their performance.
During the development of the app, optimum use was made of the additional (technical) possibilities the new environment offered. The instructional texts of the strategy training are provided in videos, audio clips and read-only formats and patients can look back as often as they feel necessary. ReMind incorporates several other functions to make it as user-friendly as possible, such as help-overlay screens and links to explanations of important definitions. The program also offers the possibility to involve a significant other, which can be a spouse, family member, friend or professional: the ReMinder. Patients can send this ReMinder an email from anywhere in the program, for example to ask for advice when they get stuck in a text or an exercise.
Guidance
Three months after surgery, immediately after the second neuropsychological assessment (T3), a face-to-face appointment was planned, to hand over the iPad on which the ReMind-app was installed together with an explanation of the app. During the intervention period, the researcher contacted the patients by telephone every 2 weeks, to check on their progress, plan the course of their training and to address questions. It was advised and expected that patients spent 3 h per week on the program, to complete the program within 10 weeks. A second face-to-face appointment took place at the end of the program, to retrieve the iPad and to collect the completed questionnaires.
Measures
Accrual and attrition
Accrual was defined as the total number of included patients as compared to the number of invited patients. The number of patients who declined participation and reasons for decline were carefully recorded. The same was done for the number of patients who dropped out of the study and reason(s) for this attrition.
Adherence
Adherence to the program was indicated by both the number of completed module sections in the strategy training and the number of exercises performed in the retraining, each expressed in percentages of total available sections and exercises, respectively. If patients completed ≥ 80% of both the strategy training and the retraining, adherence was considered acceptable. To calculate mean percentages for the group, a maximum of 100% per individual was used, even if patients worked through the program more than once. Reasons for non-adherence as reported in the telephone calls during the intervention and in the face-to-face appointment at the end of the program were recorded.
Patient experience
After completing the program, patients were requested to fill out a study-specific questionnaire, evaluating their experiences with ReMind (e.g., satisfaction, enjoyment, usefulness and burden), whether they would recommend any changes in (elements of) the program, and if they would recommend it to other patients.
Feasibility of neuropsychological assessments
Neuropsychological tests and patient-reported outcome measures (PROMs) were administered to describe baseline functioning of the patients and to test the feasibility of procedures for later use on a larger scale. Objective cognitive functioning was assessed by the computerized neuropsychological test battery CNS Vital Signs [21, 22] and three paper-and-pencil tests, namely Letter Fluency, Digit Span (WAIS), and Paired Associates (WMS) [23,24,25]. Z-scores were calculated using normative data and Z-scores ≤ − 1.5 were considered as low. Subjective cognitive functioning was assessed with the Cognitive Failures Questionnaire (CFQ) [26]. Based on Dutch representative normative data [27], a total score of ≥ 42 was considered as clinically high. Symptoms of anxiety and depression were assessed with the Hospital Anxiety and Depression Scale (HADS) [28, 29], with a cut-off for both scales of ≥ 8.
Data analysis
Percentages of eligible, included, excluded and dropped-out patients were calculated. Descriptive statistics of participants are presented. This feasibility study (n = 15) was not designed, and therefore not powered, to evaluate the efficacy of ReMind.