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Table 1 Baseline demographic characteristics, clinical data, PK/PD indices, and clinical outcomes of all patients included and between PDT attainment and non-attainment groups

From: Failure of target attainment of beta-lactam antibiotics in critically ill patients and associated risk factors: a two-center prospective study (EXPAT)

Characteristics

All patients (n = 147)

PDT attainment (n = 93)

PDT non-attainment

(n = 54)

p valuea

Demographic data

 Age (years)

63 (56–70)

65.0 (58.5–73.0)

60.5 (51.0–66.0)

0.001

 Sex (male/female)

91/56

51/42

40/14

0.021

 Length (cm)

172.2 (10.7)

169.7 (10.1)

176.6 (10.3)

< 0.001

 Weight (kg)

77 (70–90)

75 (68–90)

80 (70–90)

0.339

 BMI

26.1 (22.9–29.3)

26.9 (23.9–29.6)

25.3 (22.2–28.1)

0.087

 Concomitant antibiotics

   

0.029

  No

54 (36.7%)

28 (30.1%)

26 (48.1%)

 

  Yesb

93 (63.3%)

65 (69.9%)

28 (51.9%)

 

Clinical data at inclusion

 SOFA

11.0 [7.0–15.0]

  

0.293

  0–6

28 (19.0%)

15 (16.3%)

13 (24.1%)

 

  7–9

32 (21.8%)

18 (19.6%)

14 (25.9%)

 

  10–14

38 (25.9%)

24 (26.1%)

14 (25.9%)

 

  15

48 (32.7%)

35 (38.0%)

13 (24.1%)

 

 APACHE II

23 [18–27]

  

0.161

  0–9

5 (3.4%)

3 (3.3%)

2 (3.7%)

 

  10–19

39 (26.7%)

20 (21.7%)

19 (35.2%)

 

  20–29

85 (58.2%)

55 (59.8%)

30 (55.6%)

 

  ≥ 30

17 (11.6%)

14 (15.2%)

3 (5.6%)

 

 Albumin (g/L)

26.3 (7.3)

24.9 (7.0)

28.5 (7.3)

0.003

 Serum creatinine (μmol/L)

102 [67–155]

124.0 [79.5–182.5]

79.5 [56.8–106.3]

< 0.001

 Temperature (°C)

36.9 [36.1–37.4]

36.7 [36.0–37.3]

37.0 [36.3–37.6]

0.112

 WBC (× 109/L)

13.2 [8.7–18.2]

11.7 [7.3–17.8]

15.8 [10.7–20.2]

0.022

 CRP (mg/L)

111 [35–226]

120 [46–242]

91 [15–175]

0.072

 Serum urea (mmol/L)

8.9 [6.1–16.5]

12.4 [7.1–19.2]

6.6 [4.8–9.3]

< 0.001

 eGFR (mL/min/1.73 m2)

   

< 0.001

  < 30

29 (19.7%)

25 (26.9%)

4 (7.4%)

 

  30–50

31 (21.1%)

28 (30.1%)

3 (5.6%)

 

  50–90

41 (27.9%)

19 (20.4%)

22 (40.7%)

 

  > 90

46 (31.3%)

21 (22.6%)

25 (46.3%)

 

 CRRT

   

0.063

  No

119 (81%)

71 (76.3%)

48 (88.9%)

 

  Yes

28 (19%)

22 (23.7%)

6 (12.1%)

 

PK/PD indices

 %ƒT > MICECOFF

84.2%

   

 %ƒT > 4×MICECOFF

51.7%

   

Clinical outcomes

 ICU LOS (days)

9 [4–15]

11 [6–20]

5 [3–12.8]

0.005

 30-day mortality

29 (19.7%)

22 (24.2%)

7 (13.2%)

0.135

  1. Values are presented as numbers (%), median [25%–75% interquartile range], or mean (± standard deviation). The numbers in bold are statistically significant
  2. APACHE II Acute Physiology and Chronic Health Evaluation II, BMI body mass index, CRP C-reactive protein, CRRT continuous renal replacement therapy, ECOFF epidemiological cut-off value, eGFR estimated glomerular filtration rate, calculated with the CKD-EPI Creatinine Equation, ƒT > MIC the unbound concentrations above the minimum inhibitory concentration, ICU LOS intensive care unit length of stay, calculated from the start of study antibiotic until ICU discharge, PDT pharmacodynamic target, SOFA score Sequential Organ Failure Assessment score, WBC white blood cell count
  3. aThe p value between target attainment versus non-attainment patient population and the value in bold indicates a significant difference between the two groups (p ≤ 0.05)
  4. bOne or more additional antibiotics