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Table 1 Participant characteristics at baseline

From: Pediatric size phlebotomy tubes and transfusions in adult critically ill patients: a pilot randomized controlled trial

Characteristic

Pediatric tubes (n = 100)

Adult tubes (n = 100)

Age, year, mean (SD)

55 (16.7)

57 (18.5)

Women, n (%)

45 (45)

51 (51)

Race, n (%)

 White

38 (38)

39 (39)

 Black

36 (36)

46 (46)

 Other

26 (26)

15 (15)

ICU admission hemoglobin, g/dL

 Median (IQR)

11.4 (9.3–12.7)

11.3 (9.2–12.7)

 Mean (SD)

11.4 (2.4)

11.1 (2.3)

ICU admission hemoglobin category, n (%)

 7–9.49 g/dL

27 (27)

29 (29)

 9.5–11.99 g/dL

32 (32)

32 (32)

 ≥ 12 g/dL

41 (41)

39 (39)

Time from ICU admission to randomization, h, median (IQR)

5.3 (1.5–8)

5.7 (2.6–8.6)

Estimated blood volume per participant, L, median (IQR)a

4.9 (4.2–5.6)

4.6 (3.9–5.4)

Chronic hemodialysis, n (%)

12 (12)

12 (12)

Chronic kidney disease but no dialysis, n (%)

13 (13)

11 (11)

Active malignancy, n (%)

5 (5)

5 (5)

Recent history of anemia, n (%)b

45 (45)

47 (47)

Charlson comorbidity index, median (IQR)c

3.0 (2–6)

4.0 (2–5)

ICU admission diagnosis, n (%)d

 Infection

55 (55)

46 (46)

 Acute cardiovascular disorder

21 (21)

24 (24)

 Acute renal failure

40 (40)

31 (31)

 Metabolic disorder

32 (32)

36 (36)

 Non-infectious inflammatory disordere

19 (19)

11 (11)

 Other

22 (22)

31 (31)

Invasive mechanical ventilation, n (%)

50 (50)

51 (51)

APACHE II score, median (IQR)f

22.0 (14-29)

23.0 (16-28)

  1. SD standard deviation, ICU intensive care unit, IQR interquartile range, APACHE Acute Physiology and Chronic Health Evaluation
  2. aThe blood volumes were estimated according to Nadler method, which is based on the participant’s gender, height, and weight
  3. bA recent history of anemia was defined as hemoglobin below 13 g/dL in men or 11.6 g/dL in women in the preceding 6 months
  4. cThe Charlson comorbidity index measures the effect of coexisting conditions on mortality, with scores ranging from 0 to 33. Higher scores indicate greater burden of illness
  5. dThe diagnosis are not mutually exclusive
  6. eNon-infectious inflammatory disorders included conditions such as acute pancreatitis, asthma exacerbation, and chronic obstructive pulmonary disease exacerbation
  7. fAPACHE II scores are assessed on a scale from 0 to 71. Higher scores indicate higher risk of death