Understanding the reach of an evidence-based public health intervention to optimise nutrition and movement behaviour at scale: The INFANT Program

Abstract

Objective

To describe the equitable reach of INFANT, an evidence-based early life nutrition and movement behaviour program when scaled up.

Methods

INFANT, comprising a free app and practitioner-led groups, was offered across Victoria, Australia, from 2021. Practitioner training was tracked via records, and caregiver participation measured through an app survey. Program reach was estimated per 1000 births in each local government area (LGA). Logistic regression models identified factors associated with group enrolment/attendance.

Results

By November 2024, INFANT groups were offered in 48 (61%) Victorian LGAs and the app was used in 78 (99%) reaching 11,358 caregivers. LGAs with higher rates of practitioners trained achieved better program reach. Compared to Victorian women of reproductive age, a higher proportion of INFANT participants were university educated, English speaking, from advantaged communities and outside major cities. In LGAs offering both program components, group enrolment/attendance was higher among first-time parents, those practicing mixed feeding, living in disadvantaged communities and outside major cities.

Conclusions

INFANT achieved high reach, with group sessions reaching more disadvantaged parents. Efforts continue to expand reach for priority groups.

Implications for Public Health

This is the first study to assess the equitable reach of an early life health promotion program at scale.