Table 4.

Correlation between RBC cholinesterase (E-AChE) levels and the prognosis of organophosphorus and carbamate poisoning

Variables	Measure of association	p-value
RBC cholinesterase levels in units/gram hemoglobin
The initial dose of atropine (mg)	ρ: –0.653	<0.001
The total dose of atropine (mg)	ρ: –0.659	<0.001
Admission in Intensive Care Unit: median (IQR#) of RBC cholinesterase
Yes	1.8 (IQR: 0.9, 6.1)	0.002
No	14.9 (IQR: 3.7, 40.1)
Moderate to severe POP% severity scale: median (IQR#) of RBC cholinesterase
Yes	1.6 (IQR: 0.65, 3.75)	0.001
No	8.45 (IQR: 1.93, 37.75)
Duration of hospital stay	ρ: –0.302	0.02
Intermediate syndrome: median (IQR#) of RBC cholinesterase
Yes	1.65 (IQR: 0.75, 6.95)	0.06
No	4.1 (IQR: 1.6, 35.35)

ρ: rho-value – Spearman's coefficient of correlation; POP^%, peradeniya organophosphorus poisoning (POP) scale, IQR^#, interquartile range. Mann–Whitney U test was applied for the comparison of central tendency between two groups