, data published Feb. 1 suggest.
The findings by Mark A. Bellis, DSc, College of Human Sciences, Bangor (Wales) University, and colleagues were published online in BMJ Open.
The results are especially significant, the authors say, because of the prevalence of adverse childhood experiences (ACEs) globally, with proportions of people having multiple traumas in some countries at 10% or more of the population.
The authors wrote that hesitancy or refusal to get the vaccine increased with the number of traumas reported.
For example, hesitancy was three times higher among people who had experienced four or more types of childhood trauma than among those who did not report any traumatic events.
Dr. Bellis told this news organization that though their work suggests that higher levels of ACEs are linked with higher vaccine hesitancy, it is by no means the only reason people choose not to get vaccinated.
However, he said, the association they found may have key messages for clinicians.
“For clinicians, simply being trauma informed can help,” Dr. Bellis said. “Understanding how such childhood adversity can affect people may help them when discussing vaccines, and in understanding resistance to what is a complex medical issue and one that requires considerable trust. What can appear routine to a clinician may be a difficult leap of faith especially for those who have poorer experiences of trusting even within family settings.”
More trauma, less trust
The authors used responses to a nationally representative telephone survey of adults in Wales taken between December 2020 and March 2021, when COVID-19 restrictions were in force. Out of 6,763 people contacted, 2,285 met all criteria and answered all the questions and were included in the final analysis.
The survey asked about nine types of ACEs before the age of 18, including: parental separation; physical, verbal, and sexual abuse; exposure to domestic violence; and living with a household member who has mental illness, misuses alcohol and/or drugs, or who was incarcerated.
It also included personal details and long-term health information.
About half of the respondents said they hadn’t experienced any childhood trauma. Of those who did, one in five said they had experienced one type, 17% reported two to three types, and 10% reported four or more.
According to the authors, prevalence of ACEs reported was consistent with other comparable population surveys, including those conducted face to face.
They also investigated measures of trust and preference for different health regulations.
People with more ACEs were more likely to have low trust in National Health Service COVID-19 information.
“Other sociodemographics and a history of either chronic disease or COVID-19 infection were not significantly associated with low trust,” the authors pointed out.
People reporting higher ACEs also were more likely to report that they felt they were unfairly restricted by the government. People with four or more ACEs were twice as likely than were those with no ACEs to say they felt unfairly restricted and wanted rules such as mandatory masking to stop.
People with four or more types of trauma were almost twice as likely to ignore the restrictions as were those who hadn’t experienced any – 38% versus 21% – to ignore the restrictions, even after the researchers accounted for associations with sociodemographic factors and previous COVID-19 infection or a history of long-term conditions.
“Clinicians can be a powerful voice to counter more alarmist or even conspiratorial messages that might otherwise resonate with those who find trust difficult,” Dr. Bellis said.
He said that the effect of childhood adversity needs to be considered at all levels in health systems. Overarching public health strategists should include ways to earn trust to counter resistance in some of the most vulnerable communities where ACEs can be higher.
It will also be important in the short-term to “provide reassurance, build community champions, and understand the low base from which trust needs to be built,” he said.