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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