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Table 3 Admission laboratory values between AN subtypes (N = 281)a

From: Extreme anorexia nervosa: medical findings, outcomes, and inferences from a retrospective cohort

 

AN-R

AN-BP

t-testb

p value

Laboratory Values (reference range)

Meanc

SDc

Meanc

SDc

  

Sodium (135–143 mmol/L)

137.6

4.5

135

6.4

−4.01

<.0001

Potassium (3.6–5.1 mmol/L)

3.8

0.4

3.4

0.7

−6.39

<.0001

Carbon Dioxide (18–27 mmol/L)

27.7

3.3

29.3

7.3

2.57

0.01

Glucose (3.3–11.0 mmol/L)

4.57

3.91–5.89

5.26

4.29–6.0

16,507

0.009

Calcium (2.02–2.6 mmol/L)

2.1

0.1

2.2

0.2

5.11

<.001

Phosphorus (0.87–1.58 mmol/L)

1.03

0.2

1.1

0.4

1.69

0.09

Magnesium (0.65–1.1 mmol/L)

0.95

0.1

0.98

0.2

1.60

0.11

BUN (0.21–0.79 mmol/L)

0.57

0.36–0.86

0.50

0.32–0.75

13,987

0.07

Creatinine (44.2–122.9 μmol/L)

59.3

19.1

73.9

28.6

4.65

<.0001

AST (10–40 U/L)

49

26–113

27

21–42

11,730

<.0001

ALT (7–45 U/L)

73

37–194

32

24–50

10,671

<.0001

Total bilirubin (17.1–20.5 μmol/L)

8.6

6.8–12.0

6.8

5.1–15.4

14,294

0.16

Albumin (30–53 g/L)

38.5

4.9

37.9

5.9

−0.85

0.39

Alkaline phosphatase (35–137 U/L)

67

51–97

68

54–95

15,213

0.68

Total protein (60–82 g/L)

67.0

7.5

68.7

9.1

1.78

0.08

WBC (4.5–10.0 109 L−1)

3.8

1.6

5.5

3.3

5.91

<.0001

Neutrophils (%) (48.0–69.0%)

56.9

12.6

57.4

14.5

0.27

0.79

Lymphocytes (%) (21.0–43.0%)

34.4

12.4

33.3

13.5

−0.71

0.48

Platelet count (150–400 109 L−1)

192

142–250

271

201–387

19,308

<.0001

Hematocrit (%) (37.0–47.0%)

36.6

5.8

37.6

5.6

1.4

0.16

MCV (80–100 fL)

94.6

6.7

91.1

6.7

−4.27

<.0001

TSH (0.34–6.0 mU/L)

2

1.2–3.1

1.4

1–2.2

11,935

<.001

INR (0.83–1.19)

1.2

0.2

1.1

0.2

−3.49

<.001

1,25 Hydroxy vitamin D (74.9–199.7 nmol/L)

97.3

77.4–128.5

97.3

64.9–132.3

13,641

0.19

Testosterone (5.6–25.2 nmol/L)

5.9

2.1–11.7

5.9

4.4–14.6

74.0

0.39

Free T3 (4.0–7.4 pmol/L)d

3.1

2.0–3.7

2.3

   

Free T4 (6.4–24.5 nmol/L)

11.1

9.1–12.9

13.1

11.8–16.3

632.0

0.01

Prealbumin (0.2–0.52 g/L)

0.18

0.06

0.21

0.07

3.61

<.001

  1. AN-R Anorexia nervosa restricting subtype, AN-BP Anorexia nervosa binge-purge subtype, BUN Blood urea nitrogen, AST Aspartate aminotransferase test, ALT Alanine aminotransferase test, WBC White blood cell, MCV Mean corpuscular volume, TSH Thyroid stimulating hormone, INR International normalized ratio, Free T3 Triiodothyronine, Free T4 Thyroxine
  2. aMagnesium and TSH were available on 274 admissions. Neutrophils, lymphocytes, and 1,25 Hydroxy Vitamin D were available on 275 admissions. INR was available on 280 admissions. Testosterone was available on 19 admissions. Free T3 was available on 7 admissions. Free T4 was available on 55 admissions. Prealbumin was available on 277 admissions
  3. bMann-Whitney U test
  4. c Median (IQR) for not normally distributed variables
  5. dThere were too few values for an analysis between AN subtypes and Free T3 (n = 7)