. Author manuscript; available in PMC: 2017 Feb 1.

Published in final edited form as: Am J Kidney Dis. 2015 Oct 9;67(2):209–217. doi: 10.1053/j.ajkd.2015.08.022

Table 5.

Spearman correlations between biomarkers of kidney injury and function among sugarcane workers

	NGAL or ΔNGAL (μg/g)		IL-18 or ΔIL-18 (ng/g)		NAG or ΔNAG (U/g)
	r	P	r	P	r	P
Pre-harvest
eGFR (mL/min/1.73 m²)	0.02	0.8	0.14	0.02	−0.12	0.05
ACR (mg/g)	0.29	<0.001	0.23	<0.001	0.20	<0.001
Change during harvest
Δ eGFR (mL/min/1.73 m²)	−0.11	0.08	0.01	0.8	−0.12	0.05
Δ ACR (mg/g)	0.22	<0.001	0.21	<0.001	0.28	<0.001

Note: r represents the Spearman correlation coefficient, and P is its associated p-value.

Abbreviations: NGAL, neutrophil gelatinase-associated lipocalin; IL-18, interleukin 18; NAG, N-acetyl-β-D-glucosaminidase; eGFR, estimated glomerular filtration rate; ACR, albumin-creatinine ratio.