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Table 4 Predictors of refeeding hypophosphatemiaa

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

  Hypophosphatemia (N = 98) Normal Phosphorus (N = 123)   
Factors Meanb SDb Meanb SDb t-testc p value
Nadir BMI 11.8 1.4 12.4 1.3 3.31 0.001
Nadir %IBW 56.7 6.3 58.5 5.5 2.21 0.03
Admission Glucose (mmol/L) 4.7 3.9–5.6 4.4 3.9–5.2 11,630 0.06
Admission Albumin (g/L) 36.8 6.8 38.0 6.3 − 1.41 0.16
Admission Prealbumin (g/L) 0.19 0.08 0.21 0.06 −1.87 0.06
Admission WBC (109 L− 1) 4.8 2.5 4.3 2.7 −1.41 0.16
Lean Mass (g)d 27,597 4351 28,578 5702 −0.92 0.36
  N % N % χ2 pvalue
Elevated admission AST (>  40 U/L) 41 42 45 37 0.63 0.42
Elevated admission ALT (>  45 U/L) 49 50 54 44 0.81 0.37
  1. BMI Body mass index, IBW Ideal body weight, WBC White blood cell, AST Aspartate aminotransferase test, ALT Alanine aminotransferase test
  2. aHypophosphatemia defined as phosphorus < 0.87 mmol/L. 60 patients with hypophosphatemia on admission were excluded
  3. bMedian (IQR) for not normally distributed variables
  4. cMann-Whitney U test
  5. dData for lean mass (g) was available for 38 patients with refeeding hypophosphatemia and 66 patients with normal phosphorus