A Targeted Preventive Early-Childhood Intervention: The Long-Term Effects of Supportive Parenting on Children's and Parents' Human Capital.

Last registered on May 18, 2022

Pre-Trial

Trial Information

General Information

Title
A Targeted Preventive Early-Childhood Intervention: The Long-Term Effects of Supportive Parenting on Children's and Parents' Human Capital.
RCT ID
AEARCTR-0009330
Initial registration date
May 18, 2022

Initial registration date is when the trial was registered.

It corresponds to when the registration was submitted to the Registry to be reviewed for publication.

First published
May 18, 2022, 5:17 PM EDT

First published corresponds to when the trial was first made public on the Registry after being reviewed.

Locations

Region

Primary Investigator

Affiliation
Tinbergen Institute, Erasmus Centre for Health Economics Rotterdam, Erasmus School of Economics

Other Primary Investigator(s)

PI Affiliation
Erasmus Centre for Health Economics Rotterdam
PI Affiliation
Erasmus Centre for Health Economics Rotterdam

Additional Trial Information

Status
Completed
Start date
2001-10-01
End date
2004-12-01
Secondary IDs
Prior work
This trial is based on or builds upon one or more prior RCTs.
Abstract
We analyse the effects of a Dutch early-childhood intervention that is designed to prevent child maltreatment. The intervention, Supportive Parenting, consists of six house visits when children are between 6 weeks and 18 months old. In 2002, an RCT was conducted in the Netherlands. By combining questionnaire data from the RCT with administrative data from Statistics Netherlands, we look at the short- and long-term effects of the intervention on the parents and children in the RCT. Hereby, we want to establish whether the intervention is effective in improving children's human capital, through changed parental behaviour.
External Link(s)

Registration Citation

Citation
Van Ourti, Tom, Bastian Ravesteijn and Ilse van der Voort. 2022. "A Targeted Preventive Early-Childhood Intervention: The Long-Term Effects of Supportive Parenting on Children's and Parents' Human Capital.." AEA RCT Registry. May 18. https://doi.org/10.1257/rct.9330-1.0
Experimental Details

Interventions

Intervention(s)
Supportive Parenting is a targeted preventive intervention in which youth healthcare nurses visit parents at home to support them in raising a child. The intervention was originally developed to prevent parenting problems and child maltreatment and generally improves the living environment of the child. Supportive Parenting is currently offered by 188 out of the 344 municipalities in the Netherlands. Around the 14th day after birth, a nurse who works at a child health clinic (consultatiebureau) visits every family in the Netherlands with a newborn child. During this visit, the nurse explains to all parents in regions that offer Supportive Parenting what the intervention entails and hands out a questionnaire that is used to identify eligible parents. The screening questionnaire tries to identify parents who are at risk of child maltreatment. The items to determine eligibility were carefully selected during the development of the intervention and the choice of variables is explained in detail by Bouwmeester et al. (2006). The questionnaire contains items on the following domains: parents' childhood experiences, parents' perceptions and expectations, parents' mental health, parents' history with substance abuse, parents' relationship with their partner, parents' social support system, parents' age, and the child's health at birth.

After the screening, nurses contact families that are eligible for the intervention by phone. The nurse again explains the intervention, discusses the outcomes of the screening questionnaire, and schedules the first house visit. Supportive Parenting is a voluntary programme, where additional support is offered to parents who could use some extra help. The nurse explains to parents that children benefit when their parent is doing well, when they are comfortable and confident in their parenting, and when they are aware of the effect their own childhood experiences can have on their behaviour. Supportive Parenting helps parents be the best version of themselves, which will in turn benefit the child. Ideally, Supportive Parenting is offered to all parents, but for financial reasons the intervention is targeted. The nurse explains to parents that the questionnaire they filled out helps nurses to find those parents who would possibly benefit most from Supportive Parenting. The intervention is not a way for municipalities to monitor parental behaviour or to check whether child maltreatment takes place within the household.

After eligible parents indicate their interest in the intervention, a youth healthcare nurse visits parents when the child is approximately 6 weeks, 3 months, 6 months, 9 months, 12 months, and 18 months old. This is in addition to care as usual, e.g. the normal visits to the child health clinics. Depending on the family situation, additional visits might be planned, either as house visits or a phone consultation. Visits are generally between 60 and 90 minutes each, depending on parental preferences. For example, some parents prefer to have shorter house visits that occur more often. The nurses who conduct house visits work at a child health clinic (consultatiebureaus) and receive additional training before the start of the intervention. During this training, nurses learn all the practicalities of the intervention, such as the structure of the house visits, the content to be discussed with parents, and the material available. Nurses learn how to explain the intervention to parents and how to discuss the sometimes delicate questionnaire items with them. In Supportive Parenting, nurses focus on the ontogenic system, the microsystem, and the exosystem used by Belsky (1980) and on the concept of parental awareness used by Baartman (1996) to explain child maltreatment. Belsky (1980) argues that there are stress and support factors in the ontogenic system, which regards the individual parent, the microsystem, which includes their immediate family, and the exosystem, which regards the broader social support system. Nurses learn to identify these factors of support and stress. Baartman (1996) explains child abuse by looking at conflicting interests between parents and children. He divides parental awareness into expectations, perceptions, and sensitivity. Nurses help parents to understand their expectations of and perceptions on the development of their child. They also focus on parents' sensitivity, defined as the ability of parents to see, understand, and anticipate what a child needs and to adequately respond to this. The training teaches nurses to identify factors of improvement. For example, for the development of children, healthy bonding with their parent is important. Nurses learn how to recognise attachment styles that are secure, avoidant, ambivalent, or disorganised. They then learn how to respond to the signals they pick up on. The training includes sufficient time for nurses to practice, with an actress playing a mother who is eligible for the intervention. The Supportive Parenting training takes approximately 18 hours.

During the house visits, nurses guide parents by open questions to indicate what their struggles are and where they would like to see improvement. The lengthy house visits give nurses far more time, compared to the regular child health clinic visits, to listen to parents and truly understand where nurses can support them best. The main topics of discussion include the development of the child, the expectations and experiences of the parents, and the social life and support system of the parents. For the development of the child, the nurse and parents focus on the health of the child, their sleeping pattern, and the relation between the child and the parents. For the expectations and experiences of parents, parents get the opportunity to talk about their own childhood. The nurse listens to their stories and helps them reflect on their experiences. This helps parents to understand where certain behaviours come from and whether their expectations are realistic. The nurse and parents use this to improve unhealthy parenting behaviours. For the social life and support system of parents, the nurse helps parents in combining parenthood with having a job, having a social life, and having a partner. It is important for parents to have a balance in their lives and it can be difficult for (new) parents to combine all these obligations. Here, the nurse and parents focus on building a network for practical and social support. The nurse helps parents to realise who they can turn to for support. This support can come from within the parents' network, from new social contacts, or from professional help. If needed, the nurse guides parents into finding further professional support, such as psychological help.
Intervention Start Date
2001-11-01
Intervention End Date
2004-05-01

Primary Outcomes

Primary Outcomes (end points)
- Parents' view on parenthood.
- Educational outcomes of children.
- Mental health of children.
Primary Outcomes (explanation)
- Parents' views on parenthood are measured by the Adult Adolescent Parenting Inventory (AAPI), when the child is 0, 1, and 2 years old. We use this construct to see if the intervention affects parents' self-reported views on parenthood. The AAPI is divided into five constructs: inappropriate parental expectations, parental lack of an empathetic awareness of children’s needs, strong belief in the use and value of corporal punishment, parent-child role reversal, and oppressing children’s power and independence.
- For educational outcomes, we look at generalised test scores at the end of primary school (age 12), binding advice by teacher about educational level to enroll in during secondary school (age 12), and education enrolled in at age 16.
- For mental health outcomes, we look at children's scores on the KIPPPI (Kort Instrument voor de Psychologische en Pedagogische Probleem Inventarisatie) at age 0, 1, and 2. The KIPPPI is an instrument to identify problematic soico-emotional development of children and is divided into the following domains: eating, sleeping, toilet training, motor skills, activity, autonomy, mental development, language/speech, play, social relationships and interactions, mood, personality, behaviour, and fear. We also look at children's' scores on the Strengths and Difficulties Questionnaire at age 5. This is a screening instrument for psycho-social problems and skills in children between 2 and 17 years old. With the questionnaire answers, an overall SDQ score is computed, as well as separate scores on the 5 domains: emotional symptoms, conduct problems, hyperactivity-inattention, peer problems, and pro-social behaviour. We are in the process of obtaining scores for children at later ages. In addition to test scores, we look at children's mental health diagnoses, treatments, and medication use. We expect this data to only be available until 2015.

Secondary Outcomes

Secondary Outcomes (end points)
- The use of other interventions and professional help by parents and children. This includes, among other things,
social work, preschool, parenting aid, and psychological help.
- Mental health of parents.
- Social support of parents.
- Parental views and experience of stress when the child is 5.
- Physical health of children.
- Physical health of parents.
- Financial situation of parents, including parents’ education, income, and job.
- Later born children, including the timing of having additional children and the number of siblings. We also have information on the perinatal health of later born children.

If possible, we look at heterogeneity in treatment effects in the following domains:
- Scores on the eligibility questionnaire. The screening scores indicate the extent to which parents are seen to be at risk of child abuse.
- Treatment intensity. We know the length and content of all house visits. Depending on the variation in the data, we want to see if treatment effects are stronger (weaker) for parents who received more (less) hours of treatment and who discussed more (less) topics.
- Child in the intervention is first born child.
- Gender of the child.
Secondary Outcomes (explanation)
- For mental health outcomes, we have parents’ scores on the Child Abuse Potential Inventory (CAPI) when the child is 0, 1, and 2 years old. We use items of this questionnaire, such as ”life often seems meaningless to me”. In addition, we look at parents’ mental health diagnoses, treatments, and medication use. We expect this data to only be available until 2015.
- For social support, we use parents’ self-reported information about their social support system. For this, we use the answers on the Social Support questionnaire, when the child is 0, 1, and 2 years old. We also have information on changes in their marital status.
- For parental views and experience of stress, we use questionnaire data from the Child Abuse Potential Inventory (CAPI) and the Nijmeegse Ouderlijke Stress Index (Nosi-R). The former measures the risk of maltreatment and the latter measures the stress parents experience. This data is only available for a subsample.
- For children's physical health, we have data at age 2, as reported by a nurse from a child health clinic and by a general practitioner. In addition, we have their medical history, including treatment reports, hospitalisations, and medication use.

Experimental Design

Experimental Design
We use data from the RCT conducted in 2002. Parents are randomly divided into treatment and control groups. At the start of the intervention, all parents fill out the following questionnaires:
- Kort Instrument voor de Psychologische en Pedagogische Probleeminventarisatie (KIPPPI): an instrument to identify problematic socio-emotional development of children.
- Child Abuse Potential Inventory (CAPI): an instrument to estimate the risk of maltreatment.
- Adult Adolescent Parenting Inventory (AAPI): an instrument developed to look at parental behaviour on the domains of inappropriate parental expectations, parental lack of an empathetic awareness of children’s needs, strong belief in the use and value of corporal punishment, parent-child role reversal, and oppressing children’s power and independence.
- Social Support questionnaire: an instrument to map parents' support system.

Those in the control group receive care as usual, e.g. standard visits to child health clinics. Parents in the treatment group receive six house visits of 90 minutes each, when the child is 6 weeks, 3 months, 6 months, 9 months, 12 months, and 18 months old. During each visit, the nurse who conducts the house visits, reports on the general development of the child, the bond between the parent(s) and child, the problems the parent(s) experience(s) in raising the child, and the social support system of the parent(s).

When the child is 12 months old, parents in both groups again fill out questionnaires (KIPPPI, CAPI, AAPI, Social Support). In addition, when the child is 12 months old, a doctor at the child health clinic (consultatiebureau) and a general practitioner report on the development of the child. At the end of the intervention, parents again fill out questionnaires (KIPPPI, CAPI, AAPI, Social Support). Parents also fill out a reflection questionnaire about their experience with Supportive Parenting and the nurse who conducts the house visits fills out a final report. When the child is 24 months old, a doctor at the child health clinic and a general practitioner report on the development of the child.

For a subgroup of our sample, we have follow-up data. When these children are 5 years old, their parents receive questionnaires from the school nurse. These include the Strengths and Difficulties Questionnaire (SDQ), the Child Abuse Potential Inventory (CAPI), and the Nijmeegse Ouderlijke Stress Index (Nosi-R). The SDQ is an instrument to diagnose psycho-social problems in children. The Nosi-R is an instrument to estimate the stress parents experience. The SDQ is handed out to all children, whereas the other questionnaires are only handed out to those who are part of the intervention or treatment group.
Experimental Design Details
Randomization Method
Randomisation was done by a computer programme that uses an undisclosed sequence of numbers to assign to individual cases.
Randomization Unit
Randomisation by family.
Was the treatment clustered?
No

Experiment Characteristics

Sample size: planned number of clusters
511 families in total.
Sample size: planned number of observations
511 families in total.
Sample size (or number of clusters) by treatment arms
249 families in the treatment group and 262 families in the control group.
Minimum detectable effect size for main outcomes (accounting for sample design and clustering)
With a power of 0.7, the MDE is approximately equal to 0.251 times the standard deviation. Here, we do not take into account the possibility that not all individuals can be matched with data from Statistics Netherlands and that we are likely to have missing data on surveys.
IRB

Institutional Review Boards (IRBs)

IRB Name
Ethics Committee of the Leiden University Medical Center
IRB Approval Date
2001-10-02
IRB Approval Number
Details not available

Post-Trial

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Intervention

Is the intervention completed?
No
Data Collection Complete
Data Publication

Data Publication

Is public data available?
No

Program Files

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Reports & Other Materials