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Table 3 Body composition by BMI stratification

From: Relationship of fat mass index and fat free mass index with body mass index and association with sleeping patterns and physical activity in Saudi young adults women

 

Underweight

Normal

Overweight

Obese

P-value

Anthropometric and Body composition

n = 276

n = 942

n = 353

n = 170

 

WHR

0.8 ± 0.0

0.9 ± 0.0

0.9 ± 0.1

0.8 ± 0.0

< 0.001

BFM (Kg)

11.8 ± 2.4

19.3 ± 4.0

29.5 ± 4.0

42.8 ± 7.5

< 0.001

FMI (Kg/m2)

4.7 ± 0.9

7.7 ± 1.5

11.7 ± 1.4

16.9 ± 2.8

< 0.001

PBF (%)

27.3 ± 4.5

35.5 ± 4.7

43.4 ± 4.1

49.3 ± 3.5

< 0.001

FFM (Kg)

31.3 ± 3.2

34.6 ± 3.7

38.5 ± 4.3

43.6 ± 5.2

< 0.001

FFMI (Kg/m2)

12.5 ± 0.8

13.8 ± 1.0

15.3 ± 1.1

17.2 ± 1.3

< 0.001

FFM/FM

2.8 ± 0.7

1.9 ± 0.4

1.3 ± 0.2

1.0 ± 0.2

< 0.001

SMM (kg)

16.3 ± 1.9

18.3 ± 2.2

20.6 ± 2.6

23.7 ± 3.1

< 0.001

VFL

4.9 ± 1.5

9.2 ± 2.7

15.0 ± 2.5

19.1 ± 1.4

< 0.001

TBW (L)

22.9 ± 2.3

25.3 ± 2.7

28.1 ± 3.1

31.9 ± 3.8

< 0.001

SMI (Kg/m2)

4.7 ± 0.5

5.3 ± 0.5

6.1 ± 0.5

6.9 ± 0.6

< 0.001

Sleep

n = 106

n = 295

n = 128

n = 47

 

Sleeping hours

7.2 ± 2.3

7.3 ± 2.5

6.9 ± 2.2

7.0 ± 2.2

0.416

Quality of sleep

7.2 ± 3.5

7.4 ± 3.4

8.0 ± 3.4

7.3 ± 2.8

0.248

Physical activity

     
 

n = 273

n = 942

n = 353

n = 170

 

Frequency

     

 No exercise

121 (44.3)

341 (36.2)

115 (32.6)

63 (37.1)

0.141

 1–2 times /week

83 (30.4)

278 (29.5)

116 (32.9)

49 (28.8)

 3 times / week

36 (13.2)

155 (16.5)

62 (17.6)

30 (17.6)

 > 3 times / week

33 (12.1)

168 (17.8)

60 (17.0)

28 (16.5)

 

n = 131

n = 437

n = 172

n = 77

 

 Duration

     

 No exercise

59 (45.0)

142 (32.5)

52 (30.2)

25 (32.5)

0.021

 ≤ 30 min

57 (43.5)

190 (43.5)

81 (47.1)

31 (40.3)

 > 30 min

15 (11.5)

105 (24.0)

39 (22.7)

21 (27.3)

  1. Data are presented as n (%) for physical activity, and as mean ± SD for the other parameters
  2. WHR: Waist-to-Hip ratio, BFM: Body Fat Mass, FMI: Fat Mass Index, PBF: Percent of Body Fat, FFM: Free Fat Mass, FFMI: Free Fat Mass Index, SMM: Skeletal Muscle Mass, VFL: Visceral Fat Level, TBW: Total Body Water, SMI: Skeletal Muscle Index. One-Way ANOVA with Tukey test and Welch ANOVA with Games-Howell was applied for anthropometric, body composition and sleep. Chi-squared test was applied for physical activity