Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Other |
Healthcare cost per quality adjusted life year (QALY) gained after 1 year |
Self-reported health resource utilisation will be evaluated for two separate 6-month recall periods. Total resource consumption will be reported as the sum of resources utilized during the entire 12-month study period. |
1 year |
|
Other |
Societal cost per QALY gained after 1 year |
To calculate societal costs, self-reported professional absenteeism will be used. Paid productivity loss is valued using the friction cost method as per Dutch national guidelines with a friction period of 85 days. Presenteeism (decreased productivity while at work due to illness) and unpaid productivity loss will be measured and valued based on Dutch costing guidelines. |
1 year |
|
Other |
Quality Adjusted Life Years (QALY) |
To determine incremental cost-utility (iCU), utility will be measured in QALYs. Results from health-related quality of life measures will be converted into utility scores (0-1) to allow calculation of QALYs. Where available, Dutch tariffs will be used. |
1 year |
|
Other |
Self-management characteristics |
As measured by the Self-Management Screening questionnaire (SeMaS) which contains 27 items, assessing a total of 10 domains. Each domain has three possible scores (low = important barrier for self management, middle = unclear/possible barrier for self management, high = self-management likely to be successful). Different combinations of scores result in different patient profiles. |
Baseline |
|
Other |
Experience with telemonitoring through SpA-Net among care providers |
Global satisfaction and agreement on statements (safety, effectiveness, patient-centeredness, timeliness, efficiency, equitability, flexibility, use of time and resources) about telemonitoring with SpA-Net, measured on a 5 point Likert scale (range: 'I strongly agree' to 'I strongly disagree'). |
1 year |
|
Primary |
Number of scheduled and unscheduled outpatient visits to the rheumatology department. |
Comparison of total number of outpatient visits in a 1-year period between intervention and control group. |
1 year |
|
Secondary |
Ankylosing Spondylitis Disease Activity Score (ASDAS) |
ASDAS is a composite index to assess disease activity in ankylosing spondylitis. Parameters included are C-reactive protein value (mg/L) and four self-reported items (0-10, numerical rating scale [NRS]): back pain, duration of morning stiffness, peripheral pain/swelling and patient global assessment of disease activity. Higher scores on individual parameters represent more severe symptoms. Higher ASDAS represents higher disease activity. |
1 year |
|
Secondary |
Bath Ankylosing Spondylitis Disease Activity Index (BASDAI) |
BASDAI consists of 6 questions representing the 5 major symptoms of ankylosing spondylitis (AS), every question is answered by using a 0-10 numerical rating scale with higher scores representing more severe symptoms: fatigue, spinal pain, joint pain / swelling, areas of localized tenderness, morning stiffness duration, morning stiffness severity. The mean of the two scores relating to morning stiffness is taken. The resulting sum of all scores (0 to 50 score) is divided by 5, resulting in a 0 - 10 BASDAI score, with increasing scores representing more active disease. |
1 year |
|
Secondary |
Global well-being patient |
Assesses the patient's global well-being during the last week on a Visual Analogue Scale, range: 0-100 mm. A score of 100 mm represents the worst outcome. |
1 year |
|
Secondary |
Patient reported pain |
Visual Analogue Scale, 0-100 mm. A score of 0 equals no pain. Higher scores represent more severe pain. |
1 year |
|
Secondary |
Disease activity according to physician |
Visual Analogue Scale, 0-100 mm. A score of zero equals no disease activity. Higher scores represent more active disease. |
1 year |
|
Secondary |
C-Reactive Protein (CRP) |
Amount of CRP detected in blood samples, expressed in mg/L. |
1 year |
|
Secondary |
Tender Joint Count 66 / Swollen Joint Count 68 |
Only if present, the number of tender (0-66) and swollen (0-68) joints will be evaluated by an independent assessor at each physical outpatient visit. |
1 year |
|
Secondary |
Presence of dactylitis and/or enthesitis |
If present, dactylitis (presence/absence, locations) and enthesitis (presence/absence, locations) will be evaluated by an independent assessor at each physical outpatient visit. |
1 year |
|
Secondary |
Psoriasis severity: Body Surface Area (BSA) |
Measurement of total area of patient's body affected by psoriasis, expressed in percentages (range: 0 - 100). |
1 year |
|
Secondary |
Psoriasis severity: Nail involvement |
Nail changes due to psoriasis will be reported as either present (yes) or absent (no). |
1 year |
|
Secondary |
36-item Short Form Health Survey (SF-36) |
The SF-36 survey contains 36 items, covering eight domains and one single item that provides an indication of perceived change in health. Aggregate percentage scores will be calculated for two components (Mental Component Score [MCS] and Physical Component Score [PCS]). Range: 0% (worst possible level of functioning) to 100% (best possible level of functioning). |
1 year |
|
Secondary |
EuroQol with 5 dimensions and 5 point Likert scale (EQ-5D-5L) |
The EQ-5D-5L evaluates five dimensions, each dimension has 5 levels (no problems, slight problems, moderate problems, severe problems, extreme problems). This decision results in a 1-digit number that expresses the level selected for that dimension. The digits for the five dimensions can be combined into a 5-digit number that describes the patient's health state. In addition, a vertical Visual Analogue Scale records the patient's self-rated health (range: 'The worst health you can imagine' [0 mm, bottom-end] to 'The best health you can imagine' [100 mm, top-end]). |
1 year |
|
Secondary |
Assessment of SpondyloArthritis international Society health index (ASAS HI) |
The ASAS HI contains 17 dichotomous response items (0 = 'I do not agree'; 1 = 'I agree'). A sum score is calculated, resulting in a total ASAS HI score ranging from 0 to 17. Lower scores indicate a better health status. |
1 year |
|