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. 2019 Oct 31;16(21):4233. doi: 10.3390/ijerph16214233

Table 5.

Classification of decoupling index.

Status		Index
Status		$\frac{Δ P_{i}}{P_{i}}$	$\frac{Δ G}{G}$	$Decoupling Index T_{i}$
Negative Decoupling	expansive	>0	>0	$T_{i}$ > 1.2
	strong	>0	<0	$T_{i}$ < 0
	weak	<0	<0	0 ≤ $T_{i}$ < 0.8
Decoupling	weak	>0	>0	0 ≤ $T_{i}$ < 0.8
	strong	<0	>0	$T_{i}$ < 0
	recessive	<0	<0	$T_{i}$ > 1.2
Connection	expansive	>0	>0	0.8 ≤ $T_{i}$ ≤1.2
Connection	recessive	<0	<0	0.8 ≤ $T_{i}$ ≤1.2