Misleading Data and Bias in Canadian Opioid Reporting

By Marvin Ross, Guest Columnist

It is sometimes said that there are lies, damned lies and statistics. That prophetic statement, often mistakenly attributed to British Prime Minister Benjamin Disraeli, explains the complete confusion in the minds of the public about the use of opioid medication.

By conflating data on prescribed opioids with illicit opioids – an apples to oranges comparison -- the average person has no real understanding of the value of opioid pain relievers. How often do we hear people say they refuse to take pain medication for fear of becoming addicted?

One Canadian agency that confuses, conflates and even admits that its data is misleading is the Canadian Centre on Substance Use and Addiction (CCSA). The reports they publish suggest that prescribed opioids are a major problem to be avoided. They are out of step with some of the provincial coroners and federal agencies such at the Public Health Agency of Canada and Health Canada.

Let's first look at what these other agencies report.

Last month, British Columbia reported its highest number of illicit drug deaths ever, nearly 6 deaths per day, with the vast majority involving fentanyl and its analogues. In neighboring Alberta, 127 of the 142 deaths in the first quarter of 2020 involved fentanyl. Neither province talks about deaths from prescribed opioids, as the main issue is illicit drugs.

While fentanyl is a prescribed drug and has many legitimate uses, only 5% of all opioids prescribed in Canada is fentanyl. Given its frequency in overdoses, it must come from illegal sources.

The Public Health Agency divides their overdose statistics into those involving patients with prescribed opioids and those with substance abuse problems.  Prescribed opioids accounted for 0.02% of total hospitalizations, while for the substance abuse population it was 0.04% of hospitalizations.

There are distinct differences in age between the two groups. People in the prescribed group were usually men and women aged 60 and older. For those with substance abuse problems, the most prevalent age group is 20 to 39 years of age. It is well known that illicit drug use is more prevalent in younger people, as this data demonstrates.

Health Canada tracks reported adverse drug reactions for prescriptions and finds that analgesics are the least likely drugs to result in an adverse event. Only 1.8% of all adverse reactions involve pain medications.

Confusing Illicit Opioids with Legitimate Opioids

These statistics all demonstrate that the problem is illicit drug use and not valid prescribed opioids given to patients in pain. In contrast, the CCSA conflates legitimate and illicit opioids, and provides a totally biased picture of what is happening.

Their July 20 report is entitled “Prescription Opiods” with no mention of illicit opioids. But then they provide data that really pertains to the illicit kind.

In 2017, 11.8% of Canadians were prescribed opioids, down from 13% in 2015. Little changed was the proportion of patients who used their prescriptions for non medical uses, which is 3 percent. So, 97% of patients prescribed opioids used them properly.

Despite that, Canada, like the United States, introduced draconian prescribing guidelines to control the 3% and, of course, that negatively impacted the 97%.

There were nearly 16,000 overdose deaths in Canada between 2016 and 2019, according to the CCSA report, with emergency room visits for opioid poisoning doubling for the 25-44 age group. Given this is a report about prescription opioids, the impression the naive reader would get is that deaths and hospital visits all pertain to legally prescribed opioids.

Next, the CCSA points out that, while the number of opioid prescriptions in Canada has fallen, 5.5% of those taking them can still become addicted. That estimate for addiction is low, but there is other research suggesting that it is even lower. In keeping with their anti-opioid bias, they state that prescription “opioids can also produce a feeling of well-being, relaxation or euphoria (“high”).”

What people who take opioids for pain experience is a decrease in pain or no pain at all, if they are lucky. That's it – there’s usually no high and no euphoria. Addicts take these drugs for its high.

They then move on to talk about the healthcare costs associated with the use of opioids, but again do not differentiate between prescribed and illicit. This leaves the reader with the impression that anyone who takes opioids for any reason is costing the health system extra for adverse events, hospitalizations, overdoses and deaths.

In fact, they are mostly talking about illicit uses as the data they provide is not dissimilar to the data provided by the Public Health Agency or Health Canada. To hammer home the CCSA’s deception, the very next section deals with driving under the influence of prescription drugs.

In 2018, two prominent health experts completed a review of all the independent health agencies funded by Health Canada and recommended that three of them had outlived their usefulness. One of those was the Canadian Centre on Substance Use and Addiction, which they recommended be abolished. For some reason, it still exists.

I asked CCSA to explain their misleading statistics and it took them almost three weeks to respond. Research and policy analyst Samantha King, PhD, admitted the data is misleading unless readers take a deep dive into the footnotes.

“We are aware that for some of the data captured in the summary, including hospitalizations due to opioid poisonings and opioid-related deaths, there is no ability to differentiate between legal or illegal sources of opioids that are causing these harms. For this reason, these sections only refer to opioids in general and contain footnotes where appropriate, highlighting the limitations of the data,” King wrote to me in an email.

So, why call the report “Prescription Opioids” when, unlike coroners and other federal agencies in Canada, you cannot differentiate between illicit opioids and legitimate ones? All I can say is that it is fortunate that Canada's handling of the Covid-19 Pandemic is being handled by the Public Health Agency and not CCSA.

Marvin Ross is a medical writer and publisher in Dundas, Ontario. He is a regular contributor to the Huffington Post.