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Table 2 Differentials in time to blood transfusion

From: Determinants and time to blood transfusion among thermal burn patients admitted to Mulago Hospital

Variable

Frequency

Log rank χ2

p value

By pre-injury related factors

Sex of the child

 Male

75

2.32

0.1274

 Female

37

Age group

 <5

66

0.18

0.6695

 5–12

10

 >12

36

Body mass index (18.5–25 kg/m2)

 Above normal

19

11.68

0.1115

 Normal

59

 Below normal

34

Pre-existing illness

 Non

93

4.16

0.3849

 Any blood disorders

2

 Respiratory disease

7

 Epilepsy

6

 Others

4

By injury related factors

Degree/depth of burns

 Partial superficial

99

1.07

0.7832

 Partial deep

4

 3rd degree

2

 Mixed

7

Inhalation injury

 Absent

28

8.85

0.0029

 Present

84

Percentage of TBSA

 Less than 20

62

11.37

0.0007

 20 and above

50

Cause of burn

 Scalds

74

12.04

0.0024

 Flame

37

 Contact

1

Severity of the burns

 Minor

1

8.01

0.018

 Moderate

29

 Major

82

Baseline WBC count at admission

 Normal

63

1.13

0.2874

 Abnormal

48

Baseline Hb count admission

 11–10

16

1.78

0.6189

 8–9.9

32

 6.7.9

2

 >11

62

By post injury factors

Surgical procedures performed

 Yes

13

6.56

0.0104

 No

99

Ward

 ICU

26

22.58

0.0000

 Holland

86

Abnormal WBC count during admission

 Yes

63

1.86

0.1729

 No

48

Focus of infection

 Yes

49

3.02

0.0821

 No

63

Lowest haemoglobin level

 Yes

62

5.11

0.0238

 No

43

Lowest serum

 Normal (3.5–4.9)

24

12.92

0.0048

 >2.9–3.5

23

 2.5–2.9

15

  1. Univariate analysis for influence on tie to transfusion. Categorized as pre-injury, injury and post-injury factors in this table, we found that
  2. Sex, body mass index (BMI) and pre-existing illnesses had significant association with blood transfusion. However, there was no association between patient age group and blood transfusion
  3. We observed a significant association of blood transfusion with inhalation injury, percentage of TBSA, cause of burn and baseline WBC count. However, there was no association with baseline HB level, body part injures or depth of the burns
  4. All the post injury variables had significant association with time to blood transfusion (surgical procedures performed, ward unit on which patient is admitted, WBC count during admission, focus of infection, low haemoglobin level during admission, lowest Serum albumin during admission) (p < 0.05) except for weather the patient was a primary or secondary referral to Mulago