COVID lockdowns hid child maltreatment - ICU admissions spiked when restrictions lifted

During the first 16 weeks of COVID-19 lockdowns in Canada, hospital admissions for maltreatment of children under age 2 fell by 31%. On the surface, this looks like good news. It was not. A study published in the Canadian Medical Association Journal argues that the drop almost certainly reflected delayed and missed detection rather than a genuine reduction in abuse - and that what happened afterward confirms this interpretation.

After the 16-week period of stringent health care restrictions ended and access normalized, ICU admissions for child maltreatment increased by 80%. Children were arriving in intensive care with injuries severe enough to require critical intervention. The researchers' conclusion is uncomfortable but direct: young children were living in dangerous situations during lockdown, their injuries going undetected, their cases uninvestigated.

What the data covered

The study, conducted by researchers from the POPCORN (Pediatric Outcomes Improvement Through Coordination of Research Networks) consortium, compared hospital admission data across two periods: a prepandemic baseline from April 2016 through February 2020, and the pandemic period from March 2020 through March 2023. Data came from the Canadian Institute for Health Information (CIHI) for all provinces and territories except Quebec, and from the Quebec equivalent (INESSS).

In total, 1,518 hospital admissions for child maltreatment occurred in children younger than 2 years across the full study period, out of an approximate population of 750,000 children in that age range. The analysis distinguished between the initial 16-week lockdown phase, the transitional period as restrictions lifted, and the later pandemic period.

Why lockdown appears to have hidden abuse

Under normal circumstances, children interact with many adults beyond their immediate household - pediatricians, daycare workers, teachers, relatives. These contacts serve as a surveillance network: they notice bruises, behavioral changes, developmental regression, or injuries inconsistent with the explanations offered. Mandatory reporters in schools, childcare, and medical settings identify a substantial fraction of child abuse cases that would otherwise go undetected.

COVID lockdowns disrupted nearly all of these contact points simultaneously. Schools closed. Primary care visits dropped sharply. Emergency departments became places families avoided. The researchers note that closed schools and restricted access to primary care physicians combined with increased household stress and parental isolation to create conditions in which both maltreatment risk and detection failure increased together.

"We consider that the observed decrease and subsequent stabilization in hospital admission incidence rate during the pandemic may be attributable to delayed case identification or lack of admissions to investigate more minor injuries, rather than a true decline in the population incidence of child maltreatment," wrote lead author Dr. Matthew Carwana of BC Children's Hospital Research Institute.

The 80% ICU surge

The post-lockdown increase in ICU admissions is the study's most alarming finding. ICU admissions represent the most severe end of the maltreatment spectrum - life-threatening injuries, not minor ones. An 80% increase above baseline suggests that children who had accumulated injuries or worsening abuse during lockdown were presenting in crisis once healthcare became accessible again, or that the absence of early detection during lockdown allowed situations to escalate to severity that required critical care.

This sequence has clear policy implications. Mechanisms for identifying child maltreatment must remain functional during public health emergencies - not suspended along with routine services. The study authors suggest that pandemic preparedness planning should explicitly include safeguards for child protection surveillance, such as virtual check-ins from social workers, active outreach to families with known risk factors, and clear pathways for concerned community members to report concerns without requiring in-person contact.

Limitations of the analysis

The study captures only cases that eventually reached hospital admission. An unknown number of maltreatment cases during lockdown never came to medical attention at all, either during the restrictions or afterward. The true incidence of abuse during lockdown is therefore likely higher than even the suppressed admission figures suggest. Hospital administrative data also do not capture the full clinical complexity of each case, and coding practices may vary across provinces.