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Table 1 Patient characteristics, labs and vital parameters expressed as median (interquartile range [IQR]) or no (percentage (%))

From: The effect of vitamin K on prothrombin time in critically ill patients: an observational registry study

  Unmatched groups Matched groups
Controls
n = 615
VK group
n = 134
Standardized difference p value Controls
n = 129
VK group
n = 129
Standardized difference p value
Variables included in matching
SAPS 3 EMR 24 (10–45) 26 (14–45) (20.8) 0.033 0.38 28 (12–47) 26 (14–42) − 0.088 0.64
Age (years) 67 (54–75) 68 (55–75) − 0.004 0.99 68 (54–75) 67 (55–74) − 0.041 0.62
Pre-treatment PT-INR 1.3 (1.3–1.4) 1.5 (1.4–1.6) 0.78 < 0.001 1.5 (1.4–1.6) 1.5 (1.4–1.6) 0.005 0.96
Sex (female) 204 (33) 43 (30) − 0.023 0.81 43 (33) 42 (33) − 0.017 0.90
Baseline variables not included in matching
Reasons for admissiona, n (%)
  Severe sepsis or septic shockb 159 (26) 53 (40) NA 0.001 53 (41) 52 (40) NA 0.90
  Trauma 61 (10) 16 (12) NA 0.49 4 (3) 15 (12) NA 0.009
  CNS 254 (41) 33 (25) NA < 0.001 32 (25) 31 (24) NA 0.89
  Haematologic 41 (7) 9 (7) NA 0.99 8 (6) 8 (6) NA 1.0
  Gastric 103 (17) 38 (28) NA 0.002 31 (24) 38 (29) NA 0.33
  Metabolic 100 (16) 17 (13) NA 0.30 23 (18) 17 (13) NA 0.30
  Respiratory 301 (49) 72 (54) NA 0.32 69 (53) 69 (53) NA 1.0
  Cardiovascular 226 (37) 28 (21) NA < 0.001 51 (40) 27 (21) NA 0.001
  Hepatic 30 (5) 9 (7) NA 0.39 7 (5) 9 (7) NA 0.61
  Renal 130 (21) 27 (20) NA 0.79 38 (29) 27 (21) NA 0.12
  Other 50 (8) 15 (11) NA 0.26 12 (9) 14 (11) NA 0.68
Comorbidities, n (%)c
 Cancerd 85 (14) 26 (19) NA 0.099 15 (12) 23 (18) NA 0.15
 Congestive heart failuree 30 (5) 9 (7) NA 0.39 10 (8) 8 (6) NA 0.63
 Haematological malignancyf 22 (4) 6 (4) NA 0.62 10 (8) 6 (5) NA 0.31
 Immunosuppressive therapyg 35 (6) 6 (4) NA 0.58 8 (6) 6 (5) NA 0.59
 Multiple comorbidities 13 (2) 3 (2) NA 0.93 2 (2) 3 (2) NA 0.65
  1. aPatients could have multiple reasons for admission that individually would justify intensive care
  2. bAccording to the Sepsis 2 definition
  3. cPatients could have multiple comorbidities
  4. dCancer disseminated beyond regional lymph nodes
  5. eNew York Heart Association stadium IV. Fatigue, dyspnoea or anginal pain at rest or minimal physical activity, which increases with physical activity
  6. fDiagnosis of lymphoma, acute leukaemia or myeloma
  7. gSystemic steroid treatment corresponding to at least 0.3 mg/kg of prednisolone daily within 6 months; external radiotherapy against invasive malignancy within 6 months; or chemotherapy due to malignancy, vasculitis, rheumatoid arthritis or inflammatory bowel disease
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