Outcome
Type |
Measure |
Description |
Time frame |
Safety issue |
Primary |
Number of people downloading the app |
Total number of people who download the app from App Stores |
Through to completion of data collection period of up to 6 months |
|
Primary |
Percentage of eligible users (denominator is number downloading) |
Proportion of users who have downloaded the app that are eligible to participate |
Through to completion of data collection period up to 6 months |
|
Primary |
Percentage of consenting users (denominator is number eligible) |
Proportion of those who are eligible to participate that consented to take part in the study |
Through to completion of data collection period up to 6 months |
|
Primary |
Percentage of randomised users (denominator is number eligible) |
Proportion of those who are eligible to participate that complete all surveys at week 0 and then automatically randomised to one of two app versions. |
Through to completion of data collection period up to 6 months |
|
Primary |
Percentage of retained users (denominator is number consenting) at 5 weeks |
Proportion of those who those who consent to participate that complete all surveys at 5 weeks |
Through to completion of data collection period up to 6 months |
|
Primary |
Percentage of retained users (denominator is number consenting) at 10 weeks |
Proportion of those who those who consent to participate that complete all surveys at 10 weeks |
Through to completion of data collection period up to 6 months |
|
Primary |
ICECAP-A Completion rate (denominator is number consenting) at 0 weeks |
Percentage of those who consent to take part that complete all 5 questions of ICECAP-A survey |
0 weeks from date of consent |
|
Primary |
ICECAP-A Completion rate (denominator is number consenting) at 5 weeks |
Percentage of those who consent to take part that complete all 5 questions of ICECAP-A survey |
5 weeks from date of consent |
|
Primary |
ICECAP-A Completion rate (denominator is number consenting) at 10 weeks |
Percentage of those who consent to take part that complete all 5 questions of ICECAP-A survey |
10 weeks from date of consent |
|
Primary |
ICECAP-A Mean Score at 0 weeks |
Average score on "ICECAP-A" Quality of Life Measure across participants |
0 weeks from date of consent |
|
Primary |
ICECAP-A Mean Score at 5 weeks |
Average score on "ICECAP-A" Quality of Life Measure across participants |
5 weeks from date of consent |
|
Primary |
ICECAP-A Mean Score at 10 weeks |
Average score on "ICECAP-A" Quality of Life measure across participants |
10 weeks from date of consent |
|
Primary |
ICECAP-A Standard Deviation of Mean Score at 0 weeks |
Standard deviation around Mean Score on "ICECAP-A" Quality of Life Measure across participants |
0 weeks from date of consent |
|
Primary |
ICECAP-A Standard Deviation of Mean Score at 5 weeks |
Standard deviation around Mean Score on "ICECAP-A" Quality of Life Measure across participants |
5 weeks from date of consent |
|
Primary |
ICECAP-A Standard Deviation of Mean Score at 10 weeks |
Standard deviation around Mean Score on "ICECAP-A" Quality of Life Measure across participants |
10 weeks from date of consent |
|
Primary |
ESSPRI Completion Rate (denominator is number consenting) at 0 weeks |
Percentage of those who consent to take part that complete all 3 questions of ESSPRI symptom severity survey (assessing dryness, fatigue and pain symptoms). |
0 weeks from date of consent |
|
Primary |
ESSPRI Completion Rate (denominator is number consenting) at 5 weeks |
Percentage of those who consent to take part that complete all 3 questions of ESSPRI survey (assessing dryness, fatigue and pain symptoms). |
5 weeks from date of consent |
|
Primary |
ESSPRI Completion Rate (denominator is number consenting) at 10 weeks |
Percentage of those who consent to take part that complete all 3 questions of ESSPRI symptom severity survey (assessing dryness, fatigue and pain symptoms). |
10 weeks from date of consent |
|
Primary |
ESSPRI Mean Score at 0 weeks |
Average score on "ESSPRI" symptom severity measure across participants |
0 weeks from date of consent |
|
Primary |
ESSPRI Mean Score at 5 weeks |
Average score on "ESSPRI" symptom severity measure across participants |
5 weeks from date of consent |
|
Primary |
ESSPRI Mean Score at 10 weeks |
Average score on "ESSPRI" symptom severity measure across participants |
10 weeks from date of consent |
|
Primary |
ESSPRI Standard Deviation of Mean Score at 0 weeks |
Standard deviation around Mean Score on ESSPRI symptom severity measure across participants |
0 weeks from date of consent |
|
Primary |
ESSPRI Standard Deviation of Mean Score at 5 weeks |
Standard deviation around Mean Score on ESSPRI symptom severity measure across participants |
5 weeks from date of consent |
|
Primary |
ESSPRI Standard Deviation of Mean Score at 10 weeks |
Standard deviation around Mean Score on ESSPRI symptom severity measure across participants |
10 weeks from date of consent |
|
Primary |
MFIS-5 Completion Rate (denominator is number consenting) at 0 weeks |
Percentage of those who consent to take part that complete all 5 questions of the Modified Fatigue Impact Scale |
0 weeks from date of consent |
|
Primary |
MFIS-5 Completion Rate (denominator is number consenting) at 5 weeks |
Percentage of those who consent to take part that complete all 5 questions of the Modified Fatigue Impact Scale |
5 weeks from date of consent |
|
Primary |
MFIS-5 Completion Rate (denominator is number consenting) at 10 weeks |
Percentage of those who consent to take part that complete all 5 questions of the Modified Fatigue Impact Scale |
10 weeks from date of consent |
|
Primary |
MFIS-5 Mean Score at 0 weeks |
Average score on the MFIS-5 fatigue impact measure, across participants |
0 weeks from date of consent |
|
Primary |
MFIS-5 Mean Score at 5 weeks |
Average score on the MFIS-5 fatigue impact measure, across participants |
5 weeks from date of consent |
|
Primary |
MFIS-5 Mean Score at 10 weeks |
Average score on the MFIS-5 fatigue impact measure, across participants |
10 weeks from date of consent |
|
Primary |
MFIS-5 Standard Deviation of Mean Score at 0 weeks |
Standard deviation around Mean Score on MFIS-5 fatigue impact measure across participants |
0 weeks from date of consent |
|
Primary |
MFIS-5 Standard Deviation of Mean Score at 5 weeks |
Standard deviation around Mean Score on MFIS-5 fatigue impact measure across participants |
5 weeks from date of consent |
|
Primary |
MFIS-5 Standard Deviation of Mean Score at 10 weeks |
Standard deviation around Mean Score on MFIS-5 fatigue impact measure across participants |
10 weeks from date of consent |
|
Primary |
Depression Digital Visual Analogue Scale (VAS) Completion Rate (denominator is number consenting) at 0 weeks |
Percentage of those who consent to take part that complete the single digital VAS regarding severity of depression |
0 weeks from date of consent |
|
Primary |
Depression Digital Visual Analogue Scale (VAS) Completion Rate (denominator is number consenting) at 5 weeks |
Percentage of those who consent to take part that complete the single digital VAS regarding severity of depression |
5 weeks from date of consent |
|
Primary |
Depression Digital Visual Analogue Scale (VAS) Completion Rate (denominator is number consenting) at 10 weeks |
Percentage of those who consent to take part that complete the single digital VAS regarding severity of depression |
10 weeks from date of consent |
|
Primary |
Depression Digital Visual Analogue Scale (VAS) Mean Score at 0 weeks |
Average score on the 100 point digital VAS across participants |
0 weeks from date of consent |
|
Primary |
Depression Digital Visual Analogue Scale (VAS) Mean Score at 5 weeks |
Average score on the 100 point digital VAS across participants |
5 weeks from date of consent |
|
Primary |
Depression Digital Visual Analogue Scale (VAS) Mean Score at 10 weeks |
Average score on the 100 point digital VAS across participants |
10 weeks from date of consent |
|
Primary |
Depression Digital VAS Standard Deviation of Mean Score at 0 weeks |
Standard deviation around Mean Score on depression VAS across participants |
0 weeks from date of consent |
|
Primary |
Depression Digital VAS Standard Deviation of Mean Score at 5 weeks |
Standard deviation around Mean Score on depression VAS across participants |
5 weeks from date of consent |
|
Primary |
Depression Digital VAS Standard Deviation of Mean Score at 10 weeks |
Standard deviation around Mean Score on depression VAS across participants |
10 weeks from date of consent |
|
Primary |
Anxiety Digital Visual Analogue Scale (VAS) Completion Rate (denominator is number consenting) at 0 weeks |
Percentage of those who consent to take part that complete the single digital VAS regarding severity of anxiety |
0 weeks from date of consent |
|
Primary |
Anxiety Digital Visual Analogue Scale (VAS) Completion Rate (denominator is number consenting) at 5 weeks |
Percentage of those who consent to take part that complete the single digital VAS regarding severity of anxiety |
5 weeks from date of consent |
|
Primary |
Anxiety Digital Visual Analogue Scale (VAS) Completion Rate (denominator is number consenting) at 10 weeks |
Percentage of those who consent to take part that complete the single digital VAS regarding severity of anxiety |
10 weeks from date of consent |
|
Primary |
Anxiety Digital VAS Mean Score at 0 weeks |
Average score on the 100 point digital VAS across participants |
0 weeks from date of consent |
|
Primary |
Anxiety Digital VAS Mean Score at 5 weeks |
Average score on the 100 point digital VAS across participants |
5 weeks from date of consent |
|
Primary |
Anxiety Digital VAS Mean Score at 10 weeks |
Average score on the 100 point digital VAS across participants |
10 weeks from date of consent |
|
Primary |
Anxiety Digital VAS Standard Deviation of Mean Score at 0 weeks |
Standard deviation around Mean Score on the Anxiety digital VAS across participants |
0 weeks from date of consent |
|
Primary |
Anxiety Digital VAS Standard Deviation of Mean Score at 5 weeks |
Standard deviation around Mean Score on the Anxiety digital VAS across participants |
5 weeks from date of consent |
|
Primary |
Anxiety Digital VAS Standard Deviation of Mean Score at 10 weeks |
Standard deviation around Mean Score on the Anxiety digital VAS across participants |
10 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Completion Rate (denominator is number consenting) at 0 weeks |
Percentage of those who consent to take part that complete all 8 questions of the SCI |
0 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Completion Rate (denominator is number consenting) at 5 weeks |
Percentage of those who consent to take part that complete all 8 questions of the SCI |
5 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Completion Rate (denominator is number consenting) at 10 weeks |
Percentage of those who consent to take part that complete all 8 questions of the SCI |
10 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Mean Score at 0 weeks |
Average score on the SCI across participants |
0 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Mean Score at 5 weeks |
Average score on the SCI across participants |
5 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Mean Score at 10 weeks |
Average score on the SCI across participants |
10 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Standard Deviation of Mean Score at 0 weeks |
Standard deviation around Mean Score on the SCI across participants |
0 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Standard Deviation of Mean Score at 5 weeks |
Standard deviation around Mean Score on the SCI across participants |
5 weeks from date of consent |
|
Primary |
Sleep Condition Index (SCI) Standard Deviation of Mean Score at 10 weeks |
Standard deviation around Mean Score on the SCI across participants |
10 weeks from date of consent |
|
Primary |
PAM-10 Completion Rate (denominator is number consenting) at 0 weeks |
Percentage of those who consent to take part that complete all 10 questions of the Patient Activation Measure (PAM-10) |
0 weeks from date of consent |
|
Primary |
PAM-10 Completion Rate (denominator is number consenting) at 5 weeks |
Percentage of those who consent to take part that complete all 10 questions of the Patient Activation Measure (PAM-10) |
5 weeks from date of consent |
|
Primary |
PAM-10 Completion Rate (denominator is number consenting) at 10 weeks |
Percentage of those who consent to take part that complete all 10 questions of the Patient Activation Measure (PAM-10) |
10 weeks from date of consent |
|
Primary |
PAM-10 Mean Score at 0 weeks |
Average score on the PAM-10 across participants |
0 weeks from date of consent |
|
Primary |
PAM-10 Mean Score at 5 weeks |
Average score on the PAM-10 across participants |
5 weeks from date of consent |
|
Primary |
PAM-10 Mean Score at 10 weeks |
Average score on the PAM-10 across participants |
10 weeks from date of consent |
|
Primary |
PAM-10 Standard Deviation of Mean Score at 0 weeks |
Standard deviation around Mean Score on the PAM-10 across participants |
0 weeks from date of consent |
|
Primary |
PAM-10 Standard Deviation of Mean Score at 5 weeks |
Standard deviation around Mean Score on the PAM-10 across participants |
5 weeks from date of consent |
|
Primary |
PAM-10 Standard Deviation of Mean Score at 10 weeks |
Standard deviation around Mean Score on the PAM-10 across participants |
10 weeks from date of consent |
|
Primary |
User Demographics |
Investigator-developed questionnaire asking users to enter their gender (M/F/Other/Prefer not to say), age (years), whether users have primary or secondary Sjogren's syndrome, number of years since diagnosis, country of residence, and any other conditions users wish to report. |
0 weeks from date of consent |
|
Secondary |
App user retention |
Percentage of participants who launch the app at least once a week as recorded by automatically-generated logs |
Interaction data will be collected continuously for up to 13 weeks for each participant. |
|
Secondary |
Frequency of app engagement |
The maximum, minimum and average number of times the app is launched |
Interaction data will be collected continuously for up to 13 weeks for each participant. |
|
Secondary |
Duration of app engagement |
The maximum, minimum and average length of time users interact with app |
Interaction data will be collected continuously for up to 13 weeks for each participant. |
|
Secondary |
Depth of app engagement |
The maximum, minimum and average number of times users interact with specific app features after launching the app |
Interaction data will be collected continuously for up to 13 weeks for each participant. |
|
Secondary |
Acceptability of app and study procedures |
All users will be invited to participate in a remote qualitative interview (up to 60 minutes). We do not expect that all participants will take part, and aim to recruit n=20 (10 in experimental group, 10 in control group). Interested users will be contacted via email to consent and arrange a suitable interview time. Semi-structured interviews will explore acceptability of the app and study procedures (i.e. affective attitude, burden, perceived effectiveness of the app, ethicality, app coherence, and opportunity costs) and usability of the app (informed by items on the System Usability Scale. |
Interviews will take place after users have had the app installed on their device for 10 weeks after date of consent |
|