Table 3.
Admission laboratory values between AN subtypes (N = 281)a
| 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 |
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
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
bMann-Whitney U test
c Median (IQR) for not normally distributed variables
dThere were too few values for an analysis between AN subtypes and Free T3 (n = 7)