Clinical Study

Is Vitamin D Insufficiency Associated with Mortality of Critically Ill Patients?

Table 3

Comparison of patients while separated four groups according to quartiles of admission vitamin D levels.

VariableGroup 1 (1st quartile) ( )Group 2 (2nd quartile) ( )Group 3 (3rd quartile) ( )Group 4 (4th quartile) ( ) value

25(OH)D level (ng/mL)4.45 [3.13–6.19]10.85 [9.04–13.22]17.79 [16.44–19.92]38.74 [31.65–47.47]0.0001
Age (years)65.5 [57.75–76]71 [60–80]65 [56.75–74]62.5 [35.7–77]0.115
Male gender25 (50%)25 (49%)31 (62%)32 (64%)0.096
Length of hospital stay prior to ICU admission (days)5 [2–14]3 [2–6]4 [2–15]4 [1.75–11.5]0.274
Length of ICU stay (days)8,5 [5.75–20]8 [5–11]11 [6–15.25]6 [4–12.5]0,124
On admission
 APACHE II score 25.5 [20–30.25]25 [18–28]22 [16–26.25]19 [16–25.25]0.017
 SOFA score10 [6.75–14]7 [4–9]8 [6–10]6 [4–9]0.001
 Procalsitonin levels (ng/mL)4.62 [1.12–24]1.67 [0.3–8.3]1.73 [0.54–6.3]1.1 [0.28–4.5]0.047
 Calcium, ionized (mmol/L)1.09 [1.0–1.2]1.12 [1–1.23]1.19 [1.05–1.25]1.22 [1.12–1.33]0.001
 Albumin (g/dL)2.3 [1.97–2.8]2.7 [2.4–3.2]2.8 [2.2–3.125]2.8 [2.38–3.33]0.002
 Creatinine (mg/dL)2.42 [1.32–3.8]1.62 [0.84–3.23]1.42 [0.8–3.28]1.34 [0.7–2.75]0.019
On admission
 Sepsis/septic shock28 (56%)15 (29.4%)20 (40%)9 (18%)0.001
 Renal dysfunction26 (52%)13 (21%)16 (32%)7 (14%)0.0001
During ICU stay
 Invasive mechanical  ventilation29 (58%)18 (35.3%)16 (32%)13 (26%)0.001
 Renal replacement therapy25 (50%)17 (33.3%)17 (35.4%)10 (20%)0.003
ICU mortality23 (46%)19 (37.3%)20 (40%)14 (38%)0.096

Values are presented as median [interquartile range] or (%); APACHE: acute physiology and chronic health evaluation, SOFA: sequential organ failure assessment, and ICU: Intensive care unit.