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Table 5 The differences of the contents of intracellular and extracellular fluid between participants whose TWI achieve AIa or not

From: Association between the content of intracellular and extracellular fluid and the amount of water intake among Chinese college students

 

N (%)

ICF (kg)

ICF/BW(%)

ECF (kg)

ECF/BW(%)

TBW (kg)

TBW/BW(%)

ECF/ICF (%)

Total

<AI

125 (80.1%)

20.3 [17.3,24.4]

34.1 ± 4.0

12.2 [10.5,14.5]

20.6 ± 2.2

32.7 [27.7,38.5]

54.7 ± 6.2

60.5 ± 17.3

≥AI

31 (19.9%)

23.2 [17.4,24.8]

35.6 ± 3.8

13.6 [10.8,14.9]

21.6 ± 2.3

37.0 [28.2,39.9]

57.2 ± 6.1

60.6 ± 15.6

Statistical value (t/Z/χ2)

−1.086b

−1.884c

−1.566c

−2.165c

−1.566c

−2.011c

−0.255c

p

0.277

0.061

0.119

0.036

0.119

0.046

0.799

Males

<AI

63 (78.8%)

24.3 [22.2,26.3]

37.1 [34.6,39.2]

14.4 [13.4,15.6]

22.1 [20.7,23.1]

38.4 [35.7,42.0]

54.7 ± 6.2

60.5 ± 17.3

≥AI

17 (21.3%)

24.6 [23.7,26.7]

38.8 [34.9,40.5]

14.8 [14.2,16.0]

22.7 [20.8,24.2]

39.6 [37.8,42.7]

57.2 ± 6.1

60.6 ± 15.6

Statistical value (t/Z/χ2) 0.196 d

−1.100b

−1.229b

−1.365b

−0.865b

−1.188b

−2.011b

−0.255c

P 0.658

0.271

0.219

0.172

0.387

0.235

0.046

0.799

Females

<AI

62 (81.6%)

17.3 [15.9,18.4]

31.7 [30.3,33.3]

10.5 [9.8,11.4]

19.3 [18.5,20.6]

27.7 [25.8,29.9]

50.8 ± 3.4

60.6 ± 17.6

≥AI

14 (18.4%)

17.4 [16.4,19.3]

31.3 [30.3,32.1]

10.8 [10.1,11.5]

19.2 [18.5,23.4]

28.1 [26.8,30.8]

53.7 ± 4.6

60.7 ± 16.0

Statistical value (t/Z/χ2)

−0.784b

−0.697b

−0.751b

−0.409b

− 0.771b

−2.716b

−0.217b

p

0.433

0.486

0.453

0.683

0.441

0.008

0.829

  1. Note: ICF Intracellular fluid, ECF Extracellular fluid, TBW Total body water. a; TWI was compared with the recommendation for the adequate water intake (AI) for TWI set by Chinese Nutrition Society (2013) (adult male: 3000 mL; adult female: 2700 mL). Mean and standard deviation (SD) was used to describe variables in normal distribution; percentile (P50 [P25, P75]) was used to describe variables in skewness distribution; and count data were presented as n (percentage). b, means the statistical value Z of Kruskal-Wallis test for comparison of indexes between sexes. c, means the statistical value t of Student’s t-test for comparison of indexes between sexes. d, means the statistical value χ2 of χ2 test for comparison of indexes between sexes