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Table 4 Probability values, all results, for total group patients outside reference intervals

From: A retrospective analysis of biochemical and haematological parameters in patients with eating disorders

Parameter

Number of patients (n)

Expected frequency outside RIs

Observed frequency outside RIs

CHI SQUARE

p-Value

Cholesterol

113

5.65

46

281.07

≤0.001

Body mass index

102

5.1

58

557.88

≤0.001

Folate

78a

3.9

54

630.81

≤0.001

Vitamin B12

96

4.8

16

23.85

≤0.001

Magnesium

110

5.5

0

6.55

0.013

MANGANESE

106

5.3

76

929.82

≤0.001

Zinc

108

5.4

5

0.14

0.71

Calcium

108

5.4

3

1.56

0.21

Potassium

108

5.4

11

4.82

0.028

Urate

108

5.4

6

0.01

0.92

Sodium

108

5.4

8

0.82

0.36

Albumin

108

5.4

24

60.67

≤0.001

Phosphate

112

5.6

6

0.01

0.92

Ferritin

104

5.2

44

282.1

≤0.001

Vitamin D

104

5.2

16

20.4

≤0.001

White blood cells

112

5.6

13

8.50

0.003

Neutrophils

112

5.6

8

0.69

0.41

Red blood cells

112

5.6

16

17.17

≤0.001

Platelets

112

5.6

6

0.01

0.92

  1. RIs = reference intervals Significant p-values shown in BOLD type
  2. Observed frequency = number in study outside RIs; >2 SD’s outside the mean for that parameter
  3. aAs indicated in the text, only patients tested on this parameter before a test change was made by the pathology company on 21/01/13 were included in the study