Table 3. Association of absolute baseline uNGAL and uNGAL normalized to creatinine with clinical variables.

Variable	Baseline uNGAL (ng/ml)Median (95%-CI)	p-value	Baseline uNGAL (μg/g Creatinine)Median (95%-CI)	p-value
Sex
Female	31 (25–36)	<0.0001	40 (33–46)	<0.0001
Male	16 (13–18)		19 (18–21)
Age, years
≤74	17 (15–22)	0.009	21 (18–24)	<0.0001
>74	22 (19–27)		30 (25–35)
BMI, kg/m2
≤27	20 (17–24)	0.94	25 (22–29)	0.66
>27	19 (16–24)		24 (20–29)
Diabetes
yes	24 (18–31)	0.002	30 (26–37)	0.0002
No	18 (15–22)		22 (20–25)
Hypertension
yes	19 (17–23)	0.86	25 (22–28)	0.38
No	23 (14–29)		22 (18–28)
Heart disease
yes	18 (16–22)	0.005	24 (22–26)	0.03
No	29 (20–36)		30 (23–42)
Se-Creatinine (mg/dl), day-1
≤1.2	19 (16–24)	0.57	24 (21–28)	0.38
>1.2	20 (17–24)		26 (22–29)
eGFR (ml·min−1·1.73 m−2), day-1:			21 (17–26)
>60	18 (14–24)	0.0002	21 (18–24)	<0.0001
59–45	17 (13–22)		30 (27–39)
44–30	22 (18–27)		49 (34–72)
29–15	44 (28–54)		20 (20–20)
<15	7 (7–7)
Cystatin C (mg/L), day-1
≤1.2	18 (15–22)	0.001	21 (18–23)	<0.0001
>1.2	22 (18–27)		33 (27–37)
Osmolalityurine (mOsm/kgH2O), day-1
≤470	14 (12–17)	<0.0001	30 (26–36)	<0.0001
>470	26 (22–30)		21 (19–23)
Urinary protein (mg/gCreatinine) day-1
≤100	16 (13–18)	<0.0001	18 (16–20)	<0.0001
>100	27 (22–31)		37 (33–44)
Hospital stay (days)
≤2	20 (17–24)	0.54	26 (24–29)	0.42
>2	18 (16–24)		22 (20–28)

P-values were derived from Kruskal-Wallis test. Continuous variables were grouped into above and below the median with 95% confidence intervals in parenthesis.