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Table 5 Basline characteristics of patients from the trauma cohort

From: Vitamin D deficiency and risk of acute lung injury in severe sepsis and severe trauma: a case-control study

Characteristic N Cases Controls Combined P-value
   (n = 119) (n = 119) (n = 238)  
Agec 238 44.7 (30.8, 58.2) 46.8 (29.8, 56.8) 46.2 (30.4, 57.8) 0.651a
Female gender (%) 238 35 (29) 33 (28) 68 (29) 0.883b
Smoking (%) 194     0.370b
Never   36 (35) 30 (33) 66 (34)  
Former   8 (8) 3 (3) 11 (6)  
Current   60 (58) 57 (63) 117 (60)  
Diabetes (%) 238 16 (13) 16 (13) 32 (13) 1b
Summer season (%) 238 48 (40) 48 (40) 96 (40) 1b
Day length hours (IQR)c 238 12.6 (10.8, 13.8) 12.6 (10.7, 13.9) 12.6 (10.8, 13.9) 0.331a
APACHE II score (IQR) 238 26.0 (21.5, 29.5) 24.0 (19.0, 27.5) 25.0 (20.0, 29.0) 0.078a
ISSc (IQR) 204 29.0 (24.0, 35.8) 29.0 (22.0, 36.0) 29.0 (23.5, 36.0) 0.993a
Number of non-pulmonary organ failures (%) 238     0.645a
0   42 (35) 49 (41) 91 (38)  
1   61 (51) 52 (44) 113 (47)  
2   13 (11) 15 (13) 28 (12)  
3   3 (3) 3 (3) 6 (3)  
Days of ICU stay (IQR) 238 11.0 (7.0, 18.5) 9.0 (5.0, 16.0) 10.0 (6.0, 18.0) 0.155a
Hospital mortality (%) 238 10 (8) 13 (11) 23 (10) 0.663b
One-year mortality (%) 238 20 (17) 25 (21) 45 (19) 0.511b
Risk factors for ALI/ARDS 235     
Severe trauma   116 (99) 116 (99) 232 (99)  
Aspiration   2 (2) 0 (0) 2 (1)  
Other or Noned   0 (0) 1 (1) 1 (1)  
Patients on ventilator   115 (97) 115 (97) 230 (97) 1b
25-OHD (nmol/L) (IQR) 237 54.9 (38.3, 72.5) 50.8 (36.9, 69.8) 53.4 (37.2, 71.9) 0.302a
Vitamin D Status (%) 237     0.606b
Deficiency (< 50 nmol/L)   54 (45) 59 (50) 113 (48)  
Insufficiency (50 to 75 nmol/L)   37 (31) 38 (32) 75 (32)  
Sufficiency (> 75 nmol/L)   28 (24) 21 (18) 49 (21)  
  1. Data given as median and interquartile range (IQR) or frequency with (%) of patients.
  2. N is the number of non-missing values.
  3. aWilcoxon signed rank test; bMcNemar’s test; cMatched; dOther or None (multiple transfusions).