Table 1 Clinical characteristics of patients

 Gender

   Male

25

12

   Female

190

88

 Ethnicity

   Hispanic or Latino

5

2

   Not Hispanic or Latino

210

98

 Race

   White

185

86

   Black or African American

10

5

   Asian

5

2

   Other

15

7

 Diagnosis (DSM-5)

   Anorexia Nervosa (AN)

138

64

   Bulimia Nervosa (BN)

12

6

   Avoidant-Restrictive Food Intake Disorder (ARFID)

9

4

   Atypical anorexia

38

18

   Purging disorder

10

5

   Unspecified Food and Eating Disorder (UFED)

8

3

 Age, Years

215

5.8

23.2

15.3

2.8

 Duration illness, months

215

0.7

115.4

18.8

21.4

 Height, cm

215

112.3

179.0

159.3

11.5

 Weight, kg

215

17.2

107.2

44.1

11.5

 BMI, kg/m²

215

11.2

35.4

17.1

3.1

 BMI Z-Score

215

−10.1

2.2

−1.6

1.5

 Degree of malnutrition

   Mild malnutrition

11

5

   Moderate malnutrition

23

11

   Severe malnutrition

181

84

 Percentage Median BMI (%MBMI)

215

52.5

153.7

86.1

13.9

 Treatment goal weight (TGW: Projected growth curves)

215

19.0

85.6

54.0

11.2

 Percentage TGW

215

47.9

131.2

81.2

9.6

 Length of stay, days

215

3

40

11

5

 Length on telemetry/ICU, days

18

1

9

3

3

 Resting energy expenditure

215

872

2235

1279

174

 Admission calories

215

900

2800

1466

399

 Admission calories/REE

215

0.54

2.39

1.16

0.34

 Discharge calories

215

1800

5600

3754

672

 Discharge calories/REE

215

1.07

4.37

2.96

0.50

 Rate of calorie change, kcals/day

215

25

520

223

75

 Admission - discharge calorie change

215

200

4400

2288

712

 Admission- discharge calorie change/REE

215

0.14

3.28

1.79

0.51

 Required nasogastric feeds

22

10

 On psychotropic meds during stay

75

35

   Benzodiazepines

25

11.6

   SSRI’s

26

12.1

   Atypical antipsychotiics

20

9.3

   SNRI

6

2.7

   Mood stabilizers (anticonvulsants)

5

2.3

   Alpha agonists

4

1.8

   Tricyclic antidepressants

3

1.4

   Stimulants

1

0.4

   Other (Mirtazapine, Buspirone, Trazodone)

7

3.2

 Supplementation required

   Phosphorus

31

14

   Potassium

9

4

   Magnesium

6

3

 Percentage transferred to a higher level of care

32

14.9

 Discharge BMI

215

12.8

33.8

18.2

2.9

 Discharge %MBMI

215

60.1

146.8

91.4

13.6

 Discharge %TGW

215

58.1

125.3

86.1

8.9

 Percentage MBMI Gain from Admission

215

−7.1

21.9

5.3

3.7

 Percentage TGW Gain from Admission

215

−5.9

22.1

5.0

3.5

 Weight Gain, kg, from Admission

215

−4.8

6.7

2.5

1.7

 Average daily weight gain, kg

215

−0.96

0.57

0.22

0.16

 Percentage rehospitalized

   Within 30 days

6

3.8

   Within 1 year

37

17.2

 4 Weeks Follow-up BMI

157

13.6

34.2

20.0

2.8

 4 Weeks Follow-up %MBMI

157

66.1

148.6

100.9

12.9

 4 Weeks Follow-up %TGW

157

65.4

126.0

94.9

9.4

 Percentage MBMI Gain from Discharge

157

−12.8

25.4

9.2

6.0

 Percentage TGW Gain from Discharge

157

−13.5

23.9

8.8

5.7

 Weight Gain, kg, from Discharge

157

−6.7

11.9

4.6

3.0