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Fig. 1 | BMC Public Health

Fig. 1

From: Comparison of pharmaceutical, illicit drug, alcohol, nicotine and caffeine levels in wastewater with sale, seizure and consumption data for 8 European cities

Fig. 1

Relationship between the drug estimations from prevalence and seizures and consumption versus the population-normalised loads measured in wastewater. Spearman’s correlation coefficient (ρ) was used to assess the level of agreement between wastewater and other sources of data. P values less than 0.05 were considered statistically significant

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