Table 1.

Blood concentrations of MA in 506 deaths involving MA

	Group A1	Group A2	Group B	Group C	Group D
		Median, IQR	Median, IQR	Median, IQR	Median, IQR
n	1	8	28	229	240
MA concentration	2.1	1.6, 0.7–1.9a	0.5, 0.22–1.6a	0.2, 0.088–0.44b	0.2, 0.074–0.44b
Amphetamine concentration	0.37	0.14, 0.068–0.19a, b	0.1, 0.041–0.29a	0.062, 0.032–0.011a, c	0.049, 0.03–0.083b, c
Sum concentrationd	2.4	1.7, 0.79–2.2a	0.64, 0.26–1.9a	0.26, 0.11–0.52b	0.24, 0.079–0.5b
Ratioe	0.18	0.11, 0.077–0.14a	0.12, 0.088–0.22a	0.20, 0.13–0.36b	0.17, 0.11–0.29a, b

Different letters within rows denote statistically significant differences between respective groups in median values by Dunn’s procedure using Bonferroni correction for multiple tests, excluding Group A1 (refer to Table S2 for Kruskal–Wallis H test statistics and the adjusted p-values of the Dunn’s procedure pairwise comparison test)

Concentrations are in mg/L

MA methylamphetamine, IQR inter-quartile range

^dSum concentration of MA and amphetamine

^eAmphetamine:MA concentration ratio