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Active, Not Recruiting

NCT Number: NCT05026619

Youth Outlook on Life Opportunities Study

Singapore's fertility rate is currently below 1.2, raising concerns about population ageing and long-term sustainability. The fertility decline is characterized by falling birth rates among women in their 20s with almost no recuperation among women in their 30s. This project explores a) whether informational imperfections help to account for high intended ages at childbearing in Singapore, b) whether informational interventions significantly affect ideal and expected ages at marriage and childbearing, and expected probability of undergoing social egg freezing, and c) whether informational interventions significantly affect expected and actual educational outcomes and labor market outcomes.

Our hypotheses are:

1. University students have knowledge gaps about age-related onset of infertility, assisted reproductive technologies and local policy initiatives related to age at marriage and childbearing, especially among male students. 2. Being exposed to accurate information in these domains leads to significantly lower ideal/expected ages at marriage and childbearing, and higher expected probability of undergoing social egg freezing, immediately after the intervention. 3. Being exposed to accurate information in these domains does not lead to lower educational and labor market expectations immediately after the intervention among either male or female students, or to significant differences in module choices, Cumulative Average Point (CAP), starting salary and employment status of university students in the following academic semester and six months after graduation, among either male or female students.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Key information

Age range

20 year–24 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

National University of Singapore

Singapore, 119077

About this study

The project conducts a randomized controlled trial involving 1000 full-time undergraduate students at NUS. The trial has three stages.

In the first stage, participants will be recruited through campus advertisements.

In the second stage, participants who meet the eligibility criteria will complete a 30-40 minute online survey. The survey includes the following:

  • a background survey on items including age, race, family income and parental background,
  • a section on dating history,
  • questions on ideal/expected ages at marriage, expected probability of undergoing social egg freezing, and fertility and educational and career expectations,
  • a section on mental wellbeing,
  • an awareness survey on age-related onset of infertility, assisted reproductive technologies, and local policy initiatives related to age at marriage and childbearing,
  • an informational intervention. One-third of participants (333 individuals) are randomly assigned to receive accurate information on the age-related fertility survey items. One-third of participants (333 individuals) are randomly assigned to receive accurate information on policy-related survey items. One-third of participants (334 individuals) receives a fact sheet on diabetes in Singapore. Participants are asked to read the information thoroughly,
  • selected questions from c), which collects data on after-intervention intended ages at marriage and fertility and educational and career expectations, as well as questions about whether the questions were useful or led to anxiety.

In the third stage, the students' responses are linked to the Educational Data Lake managed by ALSET, Provost's Office, NUS, which collects data on students' module choices (whether within the same major, in a different major within the same faculty or in a different faculty) and CAP in the following academic semester and at graduation, graduation status, and starting salary and employment status six months after graduation. All participants are informed and these linkages are mentioned in the consent form.

After the data collection is completed, we will analyse the data using a difference-in-differences econometric model. Our model compares three sets of dependent variables at different points in time:

  • Ideal/expected ages at marriage and fertility, expected probability of undergoing social egg freezing, and educational and career expectations, compared before and immediately after the intervention,
  • Module choices and CAP, compared before the survey and in the following academic semester and at graduation, and graduation status,
  • Starting salary and employment status, compared between the control and treatment groups six months after graduation (multiple regression rather than difference-in-differences model)

The results are compared by gender, faculty, educational and career expectations, and other background characteristics, including dating history and mental wellbeing.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Full-time NUS undergraduate
  • Singaporean citizen
  • Aged 20-24
  • Never been married
  • Childless and not currently expecting
  • Identify as heterosexual

Exclusion criteria

  • Student enrolled in faculty where the Dean has not provided approval for recruitment

Treatment and study plan

Information about age-related fertility

Other

The following information is provided:

Age and fertility IVF success rates and side effects

Information about policy initiatives

Other

The following information is provided:

Assisted reproductive technology treatment subsidies Other fertility-related policies

Information about diabetes

Other

The following information is provided:

Diabetes risk factors and treatment Diabetes-related policies

Primary outcomes

  1. Ideal age at marriage (both self and future spouse), first birth and number of children

    Time frame: Within one year and two years of initial survey

    During initial survey: Continuous

  2. Expected age at marriage (both self and future spouse), first birth and number of children

    Time frame: Within one year and two years of initial survey

    During initial survey: Continuous percent chance by the following ages A. 25 B. 30 C. 35 D. 40

  3. Expected probability of undergoing social egg freezing (only for females respondents)

    Time frame: Within one year and two years of initial survey

    During initial survey: Continuous percent chance of social egg freezing if available at the following ages:

    A. 25 B. 30 C. 35 D. 40

Secondary outcomes

  1. Expected levels of education (both self and future spouse)

    Time frame: Within one year and two years of initial survey

    During initial survey: Continuous percent chance:

    A. Less than Bachelor's Degree B. Bachelor's Degree or higher C. Master's Degree or higher D. Doctoral Degree or higher

  2. Expected earnings (both self and future spouse)

    Time frame: Within one year and two years of initial survey

    During initial survey: Continuous at the following ages:

    A. 25 B. 30 C. 35 D. 40

  3. Expected full-time working status

    Time frame: Within one year and two years of initial survey

    During initial survey: Continuous percent chance by the following ages A. 25 B. 30 C. 35 D. 40

  4. Expected occupation (self) at age 35

    Time frame: Within one year and two years of initial survey

    During initial survey: Continuous percent chance:

    A. Full-time homemaker B. Manager or administrator in a private company C. Manager or administrator in the government/education sector D. Professional without doctoral degree (e.g. engineer, architect, accountant, social worker, teacher) E. Professional with doctoral degree or equivalent (lawyer, physician, scientist, college professor) F. Sales (e.g. insurance agent, real estate) G. Other (e.g. small business owner, etc.)

  5. Expected contribution to housework and childcare if married with young children

    Time frame: Within one year and two years of initial survey

    During initial survey: Continuous percentage

  6. Usefulness and anxiety over information presented

    Time frame: Within one year and two years of initial survey

    During initial survey: Strongly disagree, Disagree, Neither agree nor disagree, Agree, Strongly agree

  7. Cumulative Point Average (CAP)

    Time frame: Within two years and six years of initial survey

    Measured in the following academic semester and at graduation

  8. Module choices

    Time frame: Within two years and six years of initial survey

    Whether within the same major, in a different major within the same faculty or in a different faculty, in the following academic semester and at graduation

  9. Graduation and honours

    Time frame: Within six years of initial survey

    Whether graduated and class of honours

  10. Employment status six months after graduation

    Time frame: Within six years of initial survey

    Whether employed, full-time status

  11. Starting salary

    Time frame: Within six years of initial survey

    Continuous

Sponsors and collaborators

Lead sponsor

National University of Singapore

Other

Registry information

Important dates

Study start
2021
Primary completion
2021
Study completion
2025
First posted
Aug 30, 2021
Registry last updated
Nov 13, 2024

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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