Study objective

The primary objective of the study is to test whether we can use our remote recruitment, consenting and assessment strategy to recruit recent referrals to children’s services (CAMHS and early behavioural support services) at a sufficient monthly rate to provide statistical power for our planned STEPS RCT.

Secondary objectives include establishing the usability and acceptability of our remote recruitment, consenting and assessment strategy including the online outcome and adverse events collection procedure. We will also assess the feasibility of collecting teacher data remotely within the required timeframe and capture technical difficulties completing online questionnaires.

This study will not pilot or test the feasibility of the STEPS app as a form of a parent training intervention.


This will be a single-arm observational feasibility study.


The study will be conducted remotely (using phone calls and digital methods), with researchers based in three trial centres: London, Southampton and Nottingham (UK). Recruitment will take place across five sites: South London and Maudsley NHS Trust (SLaM), Solent NHS Trust, North East London NHS Foundation Trust (NELFT), Black Country Healthcare NHS Foundation Trust and Nottingham City Council. These five sites have been selected as they have (i) an early triage system through which referrals are placed on a child and adolescent mental health services (CAMHS) pathway, or (ii) use a digital portal (myHealthE [18] or Interactive CAMHS Assessment Network) to screen for hyperactivity/impulsivity, inattention and challenging behaviour using the Strengths and Difficulties Questionnaire [19] and to establish consent for contact (C4C).


Participants in the study will be parents of children aged 5 to 11 years that passed the initial triage and have been accepted onto the services’ assessment waiting list and the children’s teachers.

Inclusion criteria

  • Parent of a new referral. A ‘new referral’ is defined as a child who has been on a waitlist for no longer than six calendar months.

  • A routine positive screen for child’s hyperactivity/impulsivity, inattention and challenging behaviour using the SDQ (hyperactivity/inattentive subscale score ≥ 8 and conduct problems subscales score ≥ 4). These scores represent the “high” and “very high” problem groups according to the four-band classification of the SDQ cut off scores (top 10% of the population) [20].

Exclusion criteria

  • Parent lacks access to a suitable electronic device: a smartphone with operating system OS 4.1 and later (Android devices) or iOS 9.0 (Apple devices).

  • Child is living under Local Authority care.

  • Parent has an insufficient level of English language.

Foster parents of children living under local authority care have been excluded, as many foster placements are shorter than 12 months, which will be the duration of the follow-up in the RCT of STEPS.

There will be no inclusion/exclusion for teachers, but researchers will need to obtain parents’ permission for contacting teachers.


Although this is not a study of the STEPS app, we provide a brief overview of the app for information (more details can be found in Supplementary Documents: 1. Structured E-Parenting Support). In STEPS, parents will be able to move through the content (steps) at their own pace and at any time of day. The order of the steps is fixed, but there will be a degree of choice within each step. The content will be delivered mainly using short videos and audio clips.

The STEPS app has one preparatory module, “Introduction”, followed by eight separate intervention modules (steps). How long STEPS takes to complete will depend on the pace and frequency of usage. However, each of the eight steps is designed to take about 20 min if completed in one go. Parents will be able to use STEPS for 12 weeks from the time they download the app. The access to the app will be blocked 12 weeks after download, as the team will not be able to monitor the participants after that time. There will be no restrictions on concomitant care or interventions.


All study data will be collected remotely: online using Qualtrics, which is a well-established data collection platform, or on the phone by a trained researcher. For each participant, assessments will take place over the period of 4 weeks with measures taken shortly after consent (pre-baseline: sample characteristics measures and the feasibility question) and then at 1 week (baseline: questionnaires completed by parents, including economics measures), 2 weeks (adverse events collection) and 4 weeks (exit assessment) post-consent. Teachers will be contacted as soon as parents have provided their consent. Also, see Fig. 1.

Fig. 1

OPTIMA feasibility study flowchart. SDQ = Strengths and Difficulties Questionnaire; ADHD = attention-deficit/hyperactivity disorder; ODD = oppositional defiant disorder; LAC = looked after child; CAMHS = child and adolescent mental health services; OPTIMA = Online Parent Training for the Initial Management of ADHD referral


The primary outcome for this study is the number of eligible feasibility study participants who agree in principle to take part in a full RCT of STEPS each month.

Agreement in principle to take part in the upcoming STEPS RCT: feasibility study participants will each be given a balanced explanation of what an RCT involves (see 2. Feasibility Question Script in Supplementary Documents) and asked. “if there was an RCT of STEPS would they be willing to take part in it?” After being asked the question parents will be given a choice of a YES/NO answer. Parents, who answer ‘NO’, will be asked to provide a brief explanation for their decision. The researcher will note a parent’s answer and any comments on the data form.

Secondary feasibility outcomes concerning the secondary study objectives are shown in Table 1.

Table 1 Secondary feasibility outcomes

Measures and procedure

Figure 1 shows the study flowchart.

Pre-baseline measures

These will be collected directly online using Qualtrics or on the phone and entered by the researcher into Qualtrics to characterise the sample and will consist of the following questionnaires (for participant timeline see Table 2):

Table 2 Feasibility study timeline (parents only)

Eyberg Child Behavior Inventory [21] is a 36-item measure of conduct problem behaviour for children aged 2–17 years. Parents rate behaviour occurrence on a 7-point scale ranging from never to always and the item ratings are summed to yield the Intensity score. Parents also indicate whether the behaviour is a problem at present by answering “yes”/“no”. The yes responses are summed to produce a Problem score.

Social Communication Questionnaire [22] is a 40-item screening measure for autism spectrum disorder (ASD). It is based on the Autism Diagnostic Interview-Revised [23] and validated to use for ages 4 years and above. Questions focus on behaviours that are likely to be observed by the primary caregiver and concern the following domains: reciprocal social interactions, language and communication and repetitive and stereotyped patterns of behaviours. The presence of autism-positive behaviour is coded as 1 and its absence as 0. Because the first question concerns the level of current language and as is not included in the total score, for children with language, the maximum score is 39; for children without language, the maximum score is 33 (language items are inapplicable). The recommended cut-off score for cases requiring further investigation is 15. Due to the high levels of clinical co-existence of ASD and ADHD [24], this questionnaire is used to describe how much ASD there is in this population.

ADHD subscale of the Swanson, Nolan and Pelham Rating Scale-the MTA version (SNAP-IV) [25]. The SNAP-IV is a behavioural rating scale that captures the core symptoms of ADHD and ODD. The ADHD subscale of SNAP-IV consists of 18 items that are rated on a 4-point scale (not at all, just a little, quite a bit, very much). The subscale scores are obtained by averaging responses regarding inattentive and hyperactive/impulsive symptoms. Scores above the 95th percentile are considered clinically significant. The questionnaire has established validity and reliability [26].

We will also obtain information about the child’s general practitioner’s name and address and a teacher’s name and the name of the school (if a parent consented to teacher contact).

Baseline measures—parents

At baseline, parents will answer demographic questions and complete clinical outcome and health economics measures online using Qualtrics (also see Table 2).

Demographics questionnaire

Information about the child’s age, gender, ethnicity, parental education, socio-economic status and family structure (specifically, about marital status).

Clinical outcome measures

The ODD subscale of the SNAP IV [25]. This subscale consists of eight items that are rated on a 4-point scale (not at all, just a little, quite a bit, very much). The subscale score is obtained by averaging responses. Scores above the 95th percentile are considered clinically significant. The questionnaire has established validity and reliability [26].

The O’Leary Parenting Scale [27] will be used to examine changes in parenting style. Parents will rate their probabilities of using specific discipline strategies in response to child misbehaviours. Responses are made on a 7-point scale. Only items that map onto the three factors: laxness (lack of consistent responding; 5 items), over-reactivity (overly emotional or harsh responding; 5 items), hostility (hostile verbal and physical behaviour towards the child; 3 items) will be included.

The Parental Sense of Competence scale [28] will be used to measure parenting satisfaction. The scale has 16 items and parents make responses on a 6-point scale, with options ranging from strongly disagree to strongly agree. Two indices are calculated for each participant: efficacy, which reflects domain-general parenting self-efficacy and satisfaction, which reflects the degree of anxiety, frustration and motivation associated with the parental role.

Caregiver Strain Questionnaire (CGSQ) [29]. CGSQ is a 21-item measure of self-reported strain experienced by caregivers and families of children with emotional and behavioural problems, with responses made on a 5-point Likert scale. It consists of three subscales: Objective Strain, Subjective Internalised Strain and Subjective Externalised Strain. Global Caregiver Strain Score is determined by calculating the mean of all items on the CGSQ.

Economic measures

Child and Adolescent Service Use Schedule (CA-SUS) [30], a measure of service use applied in a range of populations of young people with mental health problems. The CA-SUS will be completed by the primary carer at baseline (covering the previous three months). The CA-SUS collects information on the use of all hospital and community-based health services, social care and education services, service-provided accommodation (for example, Local Authority foster or residential care) and all prescribed medications.

Child Health Utility Index (CHU-9D) [31]. The CHU-9D is a paediatric preference-based quality of life measure for use in healthcare resource allocation decision-making. The CHU-9D has been designed for self-report by children aged 7 to 17, but with an interviewer’s help, can also be used in children as young as 6 years old [32] and guidance is available from the developers for proxy completion by parents for children aged 5 and under. The questionnaire includes 9 items, each with a 5-level response category. Each item taps into a different domain of children’s present functioning: worry, sadness, pain, tiredness, annoyance, school, sleep, daily routine and activities. The present study does not involve collecting data from children; therefore, a proxy version will be used for all.

Baseline measures—teachers

Teacher data will be collected online using Qualtrics and will consist of the ODD subscale of the SNAP-IV [25].

Adverse events

Parents will be asked to report any physical and mental health difficulties or events for themselves and their child that have occurred since the start of the study. This information will be collected online during week 2 to pilot the adverse event collection procedure (see Table 2). A more detailed description of adverse events recording and reporting is provided in ‘Adverse events management’.

Exit interview: evaluation of acceptability

At the end of week 4, parents will be emailed a link to a brief evaluation questionnaire (see Table 2). The questionnaire will aim to collect information about parents’ satisfaction with remote data collection and their feedback about study procedures. Responses will be provided using structured Likert-type scales and free text boxes.

Participant timeline

Table 2 shows a detailed schedule concerning the study timeline for parents participating in the study.

Sample size

The primary aim of the feasibility study is to establish that we can recruit enough parents of new referrals for the STEPS RCT using our remote strategy incorporating existing routine CAMHS triage and clinical screening elements using MHE, ICAN or telephone-based methods across the five recruitment sites (Fig. 2). Based on the power calculations for the larger planned RCT of STEPS, we need to recruit 13 participants a month (352 families over 27 months). We will base our assessment of whether this is possible on the primary feasibility outcome described above, the rate per month of participants who answer the STEPS RCT feasibility question in the affirmative. Because we assume it is more likely that people would agree in principle to take part in STEPS RCT during the feasibility study than would actually consent to the real trial, we have adopted a conservative requirement in this feasibility of 18 (rather than 13) parents a month as our aim in this feasibility study and our stop/go criterion for the larger trial.

Fig. 2

Estimated monthly referral flow

The numbers of potential participants at each stage of the selection process during each month of the feasibility study is shown in Fig. 2. Based on audit and best information across our trial sites, we estimate that each month, parents of 200 newly referred children (of roughly 750 referrals across the 5 sites) will be eligible to take part in the feasibility study. We estimate that 50 parents would consent to the feasibility study and of these roughly 25 will give a positive response to the feasibility question, which is above the number required.

We will test this by recruiting 25 study eligible parents (half of the number available) each month (100 over 4 months). Our projections will be supported if 12 or so of these parents answer the feasibility question positively. This number will also give us a good sample in which to assess our other feasibility measures.


As part of our remote strategy, participants will be identified using one of three methods—depending on the current practice of the Trust from which they are being recruited:

Method 1: myHealthE portal

In some of the participating organisations, CAHMS triage and rapid screening for hyperactivity/impulsivity, inattention and challenging behaviour occur as part of routine care using myHealthE (MHE;—a Caldicott Guardian approved, General Data Protection Regulation (GDPR) compliant, online portal for the automated screening of referred families using NHS CAMHS data [18, 33]. MHE uses a secure text/email system through which primary caregivers are invited to register and complete validated clinical screening measures using an online portal. These are then automatically coded using standard algorithms to subsequently allow the research team to identify potentially eligible parents. MHE also seeks parents’ permission to be contacted with invitations to take part in research studies; that is, provide consent-for-contact. By consenting to research contact, parents also give their permission for Trust-approved researchers to review their children’s medical records to establish eligibility.

Authorised staff at each participating clinic site will regularly input the new referrals’ details into MHE, which will initiate the mechanism for obtaining the initial consent for research contact and for obtaining the screening information. Members of the research team will regularly log into the MHE researcher portal (this portal only includes information about children’s whose parents gave consent for contact) to check for any new cases flagged up as ‘eligible’. At each organisation, a member of the research team will identify potential participants by reviewing cases flagged up as ‘eligible’ by MHE using a standard algorithm. To be flagged as ‘eligible’ the case has to fulfil the following criteria: (1) a child is aged 5 years 0 months to 11 years 11 months, (2) a child screened positive for ADHD-type problems and challenging behaviour on the SDQ; (3) a child is not under local authority care; and (4) a parent provided routine consent for research contact. The ‘eligible’ flag will be treated as a potential participating family.

Method 2: Interactive CAMHS Assessment Network (ICAN)

In NELFT, routine outcome measures are collected through the Interactive CAMHS Assessment Network (ICAN). It is a digital application in which clinicians, young people, parents, carers and teachers can provide routine clinical measures. ICAN provides useful feedback to clinicians to help track progress and data in real-time and is directly linked to the electronic patient record.

Parents of patients, who provide consent for research contact through ICAN, will be asked to complete the SDQ also through ICAN. This information will be then passed onto the research team, who will review the SDQ scores to establish eligibility. Parents of children who meet age and the SDQ eligibility criteria will be approached by the researcher with an invitation to take part (by email, phone, or post).

Method 3: Manual review of current referrals

These methods can be adopted by any organisation participating in the study to either supplement digital identification (via MHE or ICAN) or as a sole way of identifying the eligible families.

  • Consent for contact: members of the clinical teams ask parents of patients if they are happy to be contacted about any relevant research. If they answer yes, this is recorded in their electronic health record and gives Trust-employed Clinical Study Officers (CSOs) or researchers permission to screen their record for suitability and then make direct contact with the parent to invite them to the study.

  • Clinic referral: a member of a clinical team will specifically discuss the study with the parent during a routine clinical contact and if they are interested and give permission then pass their details to CSOs or researchers to take forward from there. This will act as their referral to the study. Information about the study, including a link to access the online information sheet, may also be emailed or posted to families.

Data collection

Two categories of data will be collected in the feasibility study: (1) participants’ reports on the outcome measures and information about adverse events and (2) the STEPS app usage data (if a participant chooses to use the app).

  1. (1)

    Outcome data and information about adverse events will be collected online using Qualtrics—a secure dedicated survey platform and over the phone by a trained researcher.

Online data collection

Researchers will email participants a link to the relevant questionnaires. Participants will need to authenticate (log in) to the online platform using a password before they can view and complete the outcomes survey. After the exit assessment of the final participant is completed, data will be exported and entered into the study database.

Phone data collection (pre-baseline)

A trained researcher will ask the feasibility question and administer the three questionnaires during a phone call with a parent. Responses will be logged by a researcher directly into Qualtrics. If requested, parents will be able to complete the three questionnaires online in their own time.

  1. (2)

    All usage data will be collected by Firebase Analytics and will be stored with Google servers. Usage data held within Google Firebase will be generally of non-identifiable nature. Therefore, the risk of harm to participants following a potential privacy breach is low. After data collection has been completed, data will be transferred into the Excel database and Google Firebase account and all the data contained within the account will be deleted.

Data management

All feasibility, clinical and economic measures will be stored in Qualtrics IBM-SPSS exports and/or a study IBM-SPSS database. The app usage data for the feasibility study will be stored in an Excel database. These databases will be stored on a secure KCL network drive, accessible to the study team only. The study team will provide data extracts to the trial statisticians, upon request.

Data validation will be carried out at the time of data import or entry into the respective SPSS databases to ensure that entered values are valid (e.g., for dates, within an allowed period; for continuous variables, within an allowed range; for categorical, within a list of allowed responses). These validity criteria will be specified in a database specification document, stored in the trial master file.

The study SPSS databases will be stored in a version control system, such that changes made over time can be examined and recovered. All databases will be registered in the King’s Data Protection Register (KDPR).

Any potential data protection breach incidents will be managed in line with KCL Data Breach Management Procedure. For details of this procedure see:

De-identified data and identifying information will be stored for seven years from the completion of data collection. After this time, any identifying information will be securely destroyed, and fully anonymised data will be transferred to King’s College Research Data Management system for long-term storage.

Statistical analysis

This feasibility study will not use inferential statistics to assess the primary objective but will estimate the rate per month of eligible participants who agree in principle to take part in the upcoming STEPS RCT (with the aim of getting 18 per month to give sufficient statistical power to evaluate STEPS in the larger trial planned for later in the programme). Other objectives will be met by using descriptive statistics and qualitative assessments in combination to study the efficiency and acceptability of aspects of the proposed methods. Neither subgroup nor interim analyses are planned in this study. A quantitative statistical analysis plan is being developed.

Data monitoring

The Programme Steering Committee (PSC), a body independent of the research team, will provide formal oversight and expert advice for the overall OPTIMA programme, which includes oversight over the present feasibility study. Its role is to ensure that the trial is conducted in a rigorous and timely manner and consider any proposed changes to the agreed programme of research. Initially, the PSC will meet every six months with one meeting coinciding with the end of the feasibility study, to determine whether the project should progress to the RCT. The PSC consists of an independent chair, statistician, digital health expert, digital mental health interventions expert, two parents of a child with ADHD, and a health economics expert. Recruitment to the study will be rapid and no interim analyses are planned so a separate Data Monitoring and Ethics Committee (DMEC) will not be formed. However, we reserve the option to form one if the PSC deem it necessary at any point during the study.

Adverse events management

All adverse events (AE) will be recorded on the OPTIMA Adverse Events Form. The record will include a brief description of the event, any clinical symptoms and a date when the event started and stopped, and who was involved (e.g., a child, a parent, another family member). The researchers will be recording any AE they noted in their communications with the participant at any point during the study. In addition, to adverse events disclosed spontaneously by participants, information about adverse events will be collected online at 2 weeks post-baseline assessment using OPTIMA adverse events questionnaire.

All completed adverse event forms will be reviewed by the research team to identify any Suspected Unexpected Serious Adverse Reaction (SUSAR). If an event meets the definition of a SUSAR (any serious adverse event that is related to the trial intervention and unexpected, i.e., not listed in the protocol as an expected side effect of the intervention) then the member of staff that received the information must inform the Chief Investigator (CI) within 24 h of becoming aware of the serious adverse event and provide all necessary information. Each case will be assessed by the CI, team clinical expert and medical expert for seriousness, expectedness and relatedness to the study. The CI will then take appropriate action, which may include halting the study and informing the Sponsor of such action. Events categorised in the protocol as an expected (see Table 3), do not need to be reported.

Table 3 Expected adverse events

STEPS is a psychological intervention, not pharmacological, and so physical adverse reactions are not expected. Medical adverse events will be recorded using standard medical definitions.


The application for ethical approval for the study was submitted to the London-Riverside Research Ethics Committee (REC) and received a favourable opinion on further information on 17 November 2020, REC reference number: 20/LO/1173.

To allow maximum flexibility in terms of recruitment, a substantial amendment to the ethical application was submitted to the REC in March 2021. This amendment introduced two additional methods of participant identification (Method 2: ICAN and Method 3: a manual review of referral lists). This amendment was approved in April 2021. The REC was notified of two further non-substantial amendments, which did not require study-wide review, one in May 2021 and the second one in June 2021. The current manuscript is based on protocol version 5.0 dated 10 June 2021.

Recruitment for the study commenced in April 2021 and will continue until the end of July 2021.

Protocol amendments

In case of new information becoming available, which may result in significant changes to the risks and benefits of taking part, the Participant Information Sheet and informed consent form will be reviewed and updated accordingly. All participants actively enrolled in the study will be informed of the updated information and will be given a revised copy of the Participant Information Sheet and informed consent form to confirm their wish to continue taking part.



All participants will provide written informed consent to take part in the feasibility study. The informed consent form will be provided in electronic form using Qualtrics to be completed by the participant before they enter the study. The researcher will explain the details of the study, provide the Participant Information Sheet and will answer any questions that the participant has concerning the study. They will also inform parents that participation is completely voluntary, and they are under no obligation to take part and they can withdraw at any time without their care being affected. The researcher will also tactfully check whether it is a convenient time for a parent to commit to the study (i.e., if there is no expected imminent change to their existing care commitments, for example, late stage of pregnancy). On the consent form, there will be a separate statement requesting permission to contact the child’s teacher. If this box is not ticked, the teacher will not be contacted. If parents are unable to understand the consenting process it will be assumed that they do not meet the language requirement for the study.


Parents, who have given consent to contact their child’s teacher, will be asked to provide the name of their child’s school and the teacher’s name. The research team will then contact the teacher (by phoning or emailing a school) and invite them to take part in the study. An invitation will be followed up with an email containing a link to the teacher survey. This survey will include Teacher Information Sheet, a consent statement and a questionnaire. Teachers will also be invited to contact the research team with any questions that they might have about the study before they agree to take part.


The CI and all members of the research team will take every effort to preserve the confidentiality of participants taking part in the study. To de-identify the data, each participant will be assigned a study ID. Participants identifiable data required for administrative purposes (e.g., name and contact details) will be stored in a separate, encrypted, password-protected file. These will be accessed only by those members of the research team who are responsible for contacting participants (e.g., to email a link to the online survey). No individual participant’s data will be identifiable in the publications or reports that may result from this study.

Post-study care

Participants will continue to have access to the STEPS app for 9 weeks after the study ends. This means that overall, participants will have access to the intervention for 12 weeks.

During this time, the researchers will check in with each participant every 4 weeks (by email) and provide contact details for the local clinical services in case a parent/caregiver has any major concerns about themselves or their child. The check-in email will also remind the participant when their app access is due to expire.

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