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Table 1 Comparison of BMI, duration of AN and age, weight, direct and indirect bioimpedance parameters among groups

From: Body composition and energy expenditure in anorexia nervosa: preliminary data of outpatients with recovering and active disease

Variables

ANact (n = 9)

ANrec (n = 9)

HI (n = 16)

p

ANact x

ANrec x

ANact x

     

HI

HI

ANrec

BMI*

15.92 ± 2.58

20.32 ± 2.21

22.24 ± 1.75

 < 0.001

 < 0.001***

0.112***

 < 0.001***

(Kg/m2)

       

Duration**

48.0(20.5;156.0)

28.5(12.5; 57.0)

 

0.47

   

(months)

       

Age** (years)

23.0(19.0; 35.0)

22.0(17.0; 24.0)

23.5(22.0; 31.0)

0.335

   

Weight* (kg)

39.4 ± 5.9

51.4 ± 5.3

60.3 ± 6.7

0

   

R**(Ω)

749.0(626.0; 832.0)

614.0(582.5; 655.5)

528.5(508.5; 591.0)

0.002

0.003****

0.009****

0.047****

Xc**(Ω)

69.0(47.5; 74.5)

61.0(59.5; 73.5)

64.0(60.5; 69.8)

0.898

PA** º

4.7(4.1; 5.9)

5.8(5.5; 6.8)

6.9(6.6; 7.1)

 < 0.001

 < 0.001****

0.017****

0.033****

FFM* (kg)

31.01 ± 4.56

37.59 ± 1.89

44.56 ± 4.64

 < 0.001

 < 0.001***

 < 0.001***

0.005***

FM* (kg)

8.38 ± 3.59

13.86 ± 4.75

15.78 ± 5.06

0.002

0.002***

0.982***

0.053***

FFM** (%)

0.82(0.72; 0.86)

0.73(0.68; 0.77)

0.73(0.70; 0.77)

0.18

FM** (%)

0.18(0.14; 0.28)

0.27(0.23; 0.32)

0.27(0.23; 0.30)

0.18

TBW* (kg)

23.80 ± 4.18

28.06 ± 1.42

33.28 ± 4.02

 < 0.001

 < 0.001***

0.004***

0.051***

TBW* (%)

60.72 ± 7.6

54.98 ± 5.03

55.41 ± 6.13

0.098

FFMI**

   

 < 0.001

 < 0.001****

0.002****

0.007****

(kg/m2)

12.5(11.1; 14.4)

15.1(13.9; 15.7)

16.3(15.7; 16.9)

    

FMI* (kg/m2)

3.39 ± 1.52

5.46 ± 1.83

5.83 ± 1.76

0.006

0.006***

1.000***

0.047***

  1. * = ANOVA (difference of means; normal distribution)
  2. ** = Kruskal Wallis (difference of medians; non normal distribution)
  3. *** = Bonferroni correction
  4. **** = Man-Whitney with Bonferroni correction; ANact Active anorexia, ANrec Recovered anorexia, HI Healthy individuals BMI Body mass index;
  5. R Resistance, Xc Reactance, PA Phase angle
  6. FFM Fat free mass, FM Fat mass
  7. TBW Total body water, FFMI Fat free mass index, FMI Fat mass index significant results are highlighted by bold characters
  8. Means ± standard deviation Medians (95% confidence interval)