Table 3.

Results between groups based on existence of detectable plasma neutrophil gelatinase-associated lipocalin (NGAL).

Study variable	Detectable NGAL (n = 23)	No detectable NGAL (n = 11)	P value
Laboratory
Creatinine (μmol/L)—at rest	84.0 ± 25.2	75.1 ± 17.5	.24
Creatinine (μmol/L)—with stress	87.4 ± 26.0	75.9 ± 19.4	.16
ΔCreatinine (μmol/L)	3.3 ± 8.1	0.8 ± 6.1	.32
BNP (pg/mL)—at rest	73.8 ± 57.6	53.9 ± 46.7	.29
BNP (pg/mL)—with stress	84.0 ± 64.3	57.5 ± 44.0	.17
ΔBNP (pg/mL)	10.2 ± 11.9	3.5 ± 4.8	.03
cTnI (μg/L)—at rest	0.010 ± 0.009	0.006 ± 0.003	.05
cTnI (μg/L)—with stress	0.013 ± 0.010	0.012 ± 0.016	.86
ΔcTnI (μg/L)	0.003 ± 0.007	0.007 ± 0.015	.39
NT-proBNP (pg/mL)—at rest	511.0 ± 642.0	303.1 ± 258.0	.19
NT-proBNP (pg/mL)—with stress	556.3 ± 685.6	312.1 ± 226.5	.13
ΔNT-proBNP (pg/mL)	45.4 ± 83.2	9.0 ± 46.0	.11
AOPP (μmol/L)—at rest	105.7 ± 102.0	89.3 ± 52.8	.54
AOPP (μmol/L)—with stress	85.8 ± 91.1	71.1 ± 24.7	.48
ΔAOPP (μmol/L)	−19.9 ± 41.9	−18.2 ± 38.6	.91
Cardiovascular parameters
Segmental perfusion defects—at rest	3.8 ± 5.3	0.9 ± 2.1	.03
Segmental perfusion defects—with stress	8.2 ± 8.0	4.2 ± 3.7	.06
ΔSegmental perfusion defects	4.1 ± 3.8	3.3 ± 3.3	.51
End diastolic volume (mL)—at rest	108.4 ± 25.9	90.8 ± 31.7	.14
End diastolic volume (mL)—with stress	112.8 ± 32.5	90.2 ± 27.9	.05
ΔEnd diastolic volume (mL)	4.8 ± 11.2	0.8 ± 8.0	.25
End systolic volume (mL)—at rest	49.9 ± 21.5	34.7 ± 20.1	.07
End systolic volume (mL)—with stress	53.5 ± 27.5	34.4 ± 18.0	.02
ΔEnd systolic volume (mL)	3.6 ± 9.4	1.1 ± 7.4	.44
Ejection fraction (%)—at rest	55.8 ± 10.6	65.0 ± 10.7	.03
Ejection fraction (%)—with stress	55.1 ± 11.0	63.8 ± 10.3	.04
ΔEjection fraction (%)	−0.7 ± 5.1	−1.2 ± 4.9	.78

Δ: delta (change from prestress to poststress test).

BNP: B-type natriuretic peptide, cTnI: cardiac troponin I, NT-proBNP: N-terminal-pro-B-type natriuretic peptide, AOPP: advanced oxidation protein products, NGAL: neutrophil gelatinase-associated lipocalin.