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This, says Barrio, is because very often the immediate cause of death in these cases is an unspecified health problem, such as a myocardial infarction or suicide, which may be caused by factors unrelated to cocaine or a number of reasons.
“Also, when signs of cocaine consumption before death are revealed during possible forensic and toxicological investigations, the original certified cause of death generally goes uncorrected, thus being included in mortality statistics devoid of the surname ‘cocaine’,” adds the researcher.
Faced with the difficulty of directly quantifying the deaths related to cocaine based on general mortality statistics, the researchers compared mortality rates among a group of heroin and cocaine users with that of people among the general population of the same age and sex.
For this study, published in the ‘Journal of Substance Abuse Treatment’, two groups of cocaine users were taken, one of 8,825 people that also consumed heroin and another of 11,905 people who did not use this substance.
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Excess mortality – adjusted death rate ratio between participants and the general population – was considerable in both groups of participants. In fact, the death rate among those who also consumed heroin was 14.3 times higher than for the general population, while among those who did not consume this substance, it was 5.1 times higher.
The results also revealed that was a greater chance of men dying than women among those who also consumed heroin (1.5 times), while no
differences were found according to sex among those who did not consume this substance.
The authors stated that the excess mortality found is within the range of the results published in the past in other countries (4-12 times higher).
Other related factors
Apart from the use of heroine, other factors related to the greater risk of death were identified, such as the absence of regular employment, drug use by injection or consuming cocaine on a daily basis.
“This excess mortality may be due to the consumption of cocaine or heroin, but there are also other factors that may be different among the general population and the participants, such as mental disorders, personality traits, social conditions, etc.,” said Barrio.
“This information does not mean that female cocaine consumers have a significantly greater risk of death than their male counterparts, but that the relative increased risk of female cocaine consumers compared with women in the general population of their same age (with a very low death risk) is higher than the relative increase of consumers compared with men among the general population,” he clarified.
For the authors, the conclusions of this work are important because they will enable better estimates to be obtained for mortalities attributable to cocaine and they also show that interventions need to be increased in order to reduce the consumption of these substances and the damage caused by them..
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