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. 2014 Feb 24;4:5. doi: 10.1186/2110-5820-4-5

Table 1.

Baseline characteristics of patients from the sepsis cohort

Characteristic
N
Cases
Controls
Combined
P -value
    (n = 120) (n = 120) (n = 240)  
Agec (IQR)
240
59.3 (53.2, 65.7)
59.3 (52.7, 65.7)
59.3 (53.2, 65.7)
0.885a
Female gender (%)
240
53 (44)
56 (47)
109 (45)
0.791b
Smoking (%)
231
 
 
 
0.505b
Never
 
40 (34)
33 (29)
73 (32)
 
Former
 
44 (38)
40 (35)
84 (36)
 
Current
 
33 (28)
41 (36)
74 (32)
 
Diabetes (%)
240
31 (26)
47 (39)
78 (32)
0.045b
Summer season (%)
240
34 (28)
35 (29)
69 (29)
1b
Day length hours (IQR)c
240
12.0 (10.6, 13.6)
12.0 (10.6, 13.5)
12.0 (10.6, 13.6)
0.655a
APACHE II Score (IQR)c
240
28 (23, 32.2)
28 (23, 32.2)
28 (23, 32.2)
NA
Number of non-pulmonary organ failures (%)
240
 
 
 
0.753a
0
 
15 (12)
24 (20)
39 (16)
 
1
 
60 (50)
45 (38)
105 (44)
 
2
 
39 (32)
39 (32)
78 (32)
 
3
 
4 (3)
9 (8)
13 (5)
 
4
 
2 (2)
3 (2)
5 (2)
 
Days of ICU stay (IQR)
240
9 (6,15)
6 (4,10)
7 (4,14)
0.008a
Hospital mortality (%)
240
30 (25)
31 (26)
61 (25)
1b
One-year mortality (%)
240
66 (55)
71 (59)
137 (57)
0.614b
Risk factors for ALI/ARDS
240
 
 
 
< 0.001b
Non-pulmonary sepsis
 
55 (46)
70 (60)
125 (53)
 
Pneumonia
 
39 (33)
22 (19)
61 (26)
 
Aspiration
 
24 (20)
8 (7)
32 (14)
 
Other or Noned
 
1 (1)
16 (14)
17 (16)
 
Patients on ventilator
 
89 (74)
71 (59)
160 (67)
0.016b
25-OHD (nmol/L) (IQR)
239
45.8 (29.9, 60.8)
39.0 (25.0, 56.9)
43.2 (27.6, 58.8)
0.123a
Vitamin D status (%)
239
 
 
 
0.358b
Deficiency (< 50 nmol/L)
 
72 (60)
82 (69)
154 (64)
 
Insufficiency (50 to 75 nmol/L)
 
32 (27)
26 (22)
58 (24)
 
Sufficiency (> 75 nmol/L)   16 (13) 11 (9) 27 (11)  

Data given as median with interquartile range (IQR) or frequency with (%) of patients.

N is the number of non-missing values.

aWilcoxon signed rank test; bMcNemar’s test; cMatched; dOther or None (pancreatitis, multiple transfusions, trauma).