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Table 1 Demographic, vascular, clinical, and angiographic features of subjects

From: Clinical prediction score for prolonged length of hospital stay in aneurysmal subarachnoid hemorrhage

Variables

Prolonged LOS (> 14 days; N = 117)

Normal LOS (≤ 14 days; N = 92)

OR (CI 95%)

p value

Frequency

%

Frequency

%

  

Demographic Characteristics

Age (years)

   < 40

8

6.84

9

9.78

Reference

 

  40–59

68

58.12

62

67.39

1.234 (0.448–3.397)

0.684

   ≥ 60

41

35.04

21

22.83

2.196 (0.740–6.519)

0.156

Gender

  Male

35

29.91

35

38.04

Reference

0.216

  Female

82

70.09

57

61.96

1.439 (0.774–2.669)

Vascular Risk Factors

Hypertension

  Yes

96

82.05

69

75.00

1.524 (0.740–3.141)

0.214

  No

21

17.95

23

25.00

Diabetes Mellitus

  Yes

28

23.93

14

15.22

1.753 (0.820–3.864)

0.118

  No

89

76.07

78

84.78

Dyslipidemia

  Yes

49

41.88

31

33.70

1.418 (0.775–2.607)

0.226

  No

68

58.12

61

66.30

Smoking

  Yes

16

13.68

15

16.30

0.813 (0.352–1.889)

0.595

  No

101

86.32

77

83.70

Family History of Cerebrovascular Disease

  Yes

7

5.98

3

3.26

1.888 (0.415–11.603)

0.360

  No

110

94.02

89

96.74

Clinical Risk Factors

aSAH Grade (Based on WFNS Score)

  Low (1–3)

74

63.25

81

88.04

4.279 (1.975–9.842)

<0.001

  High (4–5)

43

36.75

11

11.96

Hyponatremia

  Yes

72

61.54

38

41.30

2.274

(1.254–4.128)

0.003

  No

45

38.46

54

58.70

Hypokalemia

  Yes

73

62.39

39

42.39

2.254 (1.244–4.093)

0.004

  No

44

37.61

53

57.61

Cardiovascular Comorbidities

  Yes

26

22.22

8

8.70

3.0 (1.228–8.064)

0.008

  No

91

77.78

84

91.30

Hospital-acquired Pneumonia

  Yes

61

52.14

7

7.61

13.227 (5.452–36.336)

<0.001

  No

56

47.86

85

92.39

Mechanical Ventilation

  Yes

71

60.68

34

36.96

2.633 (1.445–4.812)

0.007

  No

46

39.32

58

63.04

Treatment of Aneurysm

  Conservative

18

15.38

32

34.78

Reference

 

  Coiling

34

29.06

36

39.13

1.679 (0.798–3.532)

0.172

  Clipping

65

55.56

24

26.09

4.815 (2.289–10.126)

<0.001

Treatment of Hydrocephalus

Ventriculoperitoneal Shunt

  Yes

96

82.05

69

75.00

4.018 (1.893–8.976)

0.0001

  No

21

17.95

23

25.00

Lumbar Drain

  Yes

28

23.93

14

15.22

1.593 (0.222–17.942)

0.592

  No

89

76.07

78

84.78

External Ventricular Drain

  Yes

49

41.88

31

33.70

4.206 (0.859–40.223)

0.049

  No

68

58.12

61

66.30

Angiographic (Morphological) Features

Location

  Anterior Circulation

109

93.16

85

92.39

1.122 (0.332–3.697)

0.830

  Posterior Circulation

8

6.84

7

7.61

Aneurysmal Dome Sizea (n = 204)

   < 5 mm

61

53.04

51

57.30

Reference

 

  5–10 mm

42

36.52

28

31.46

1.254 (0.684–2.298)

(0.464)

   > 10 mm

12

10.43

10

11.24

1.003 (0.401–2.512)

(0.994)

  1. aSAH aneurysmal subarachnoid hemorrhage, CI confidence interval, LOS length of stay, OR odds ratio, WFNS World Federation of Neurological Surgeons
  2. aonly available for saccular aneurysms