Table 1 Clinical and biochemical characteristics of patients with anorexia nervosa and healthy controls

Age (years)

14.9 (13.4–16.1)

14.0 (11.0–16.3)

NS

BMI (kg/m²)

15.1 (13.7–16.8)

19.8 (18.9–21.2)

<0.001

BMI SD

−1.8 (−2.4–-1.1)

0.03 (− 0.4–0.8)

<0.001

Height (cm)

164.5 (159.5–169.7)

162.0 (148.0–169.5)

NS

Height SD

0.2 ± 1.1

0.5 ± 1.0

NS

Body weight (kg)

41.5 ± 8.3

52.1 ± 10.1

<0.001

Body weight SD

−1.0 (−1.6–-0.1)

0.4 (−0.1–0.9)

<0.001

Systolic blood pressure (mm Hg)

112 ± 11

ND

Systolic blood pressure SD

0.05 ± 0.96

ND

Diastolic blood pressure (mm Hg)

71 ± 8

ND

Diastolic blood pressure SD

0.47 ± 0.74

ND

Glucose (mmol/l)

4.3 (4.0–4.6)

4.7 (4.2–4.9)

<0.01

Cholesterol (mmol/l)

4.56 ± 0.96

4.39 ± 0.71

NS

HDL-cholesterol (mmol/l)

1.72 ± 0.41

1.14 ± 0.22

<0.001

Triacylglycerols (mmol/l)

0.76 (0.61–1.12)

0.72 (0.53–0.84)

<0.05

Albumin (g/l)

46.7 (44.1–48.9)

49.9 (47.5–51.8)

<0.001

Total proteins (g/l)

69.9 (66.0–73.5)

70.5 (67.6–73.2)

NS

Uric acid (μmol/l)

218 (195–258)

264 (216–309)

<0.01

Bilirubin (μmol/l)

3.8 (2.7–4.8)

9.3 (6.0–13.7)

<0.001

AST (μkat/l)

0.39 (0.32–0.47)

ND

ALT (μkat/l)

0.34 (0.25–0.52)

ND

Urea (mmol/l)

4.6 (3.4–5.6)

3.7 (3.0–4.7)

<0.05

Creatinine (μmol/l)

66 ± 13

72 ± 15

<0.05

Cystatin C (mg/l)

0.70 (0.62–0.83)

0.79 (0.69–0.83)

NS

eGFR (ml/min/1.73m²)

99 (84–110)

89 (84–100)

NS

C-reactive protein (mg/l)

0.1 (0.1–0.4)

0.2 (0.1–0.5)

NS

Leukocytes (10⁹/l)

5.4 (4.4–6.2)

ND

Urinary PCR (mg/mmol)

35.5 (22.2–48.8)

15.7 (12.7–24.0)

<0.001