. 2020 Nov 17;20:527. doi: 10.1186/s12887-020-02419-9

Table 1.

The Anthropometrical measurements of 7–13 year old rural boys (mean ± SD, range)

Anthropometrical measures	7 year old n = 71	8 year old n = 82	9 year old n = 93	10 year old n = 100	11 year old n = 101	12 year old n = 82	13 year old n = 73
Chronological age (years)	7.04 ± 0.29 6.51–7.49	8.06 ± 0.26 7.54–8.49	9.02 ± 0.30 8.52–9.47	9.97 ± 0.28 9.50-10.49	11.08 ± 0.27 10.53–11.49	11.92 ± 0.30 11.50-12.49	13.00 ± 0.29 12.51–13.49
Body mass (kg)	22.89 ± 2.52 22.29–23.48	24.71 ± 2.68 24.13– 25.30	27.02 ± 4.79 26.04–28.01	29.43 ± 5.20 28.32–30.46	32.88 ± 4.92 31.90-33.85	35.28 ± 6.41 33.87–36.69	39.70 ± 6.95 38.08–41.33
Body stature (cm)	119.32 ± 4.30 118.30–120.33	124.29 ± 4.69 123.26-125.32	128.97 ± 5.99 127.73–130.20	132.91 ± 5.74 131.78-134.05	138.31 ± 5.81 137.16-139.46	141.99 ± 7.22 140.40-143.58	149.29 ± 7.67 147.50-151.08
BMI (kg/m²)	16.05 ± 1.28 15.75–16.35	15.98 ± 1.30 15.69–16.26	16.19 ± 2.10 15.76–16.62	16.58 ± 2.01 16.18–16.98	17.13 ± 1.84 16.76–17.50	17.39 ± 2.19 16.91–17.87	17.73 ± 2.03 17.20-18.27
Triceps skinfold (mm)	6.79 ± 2.28 6.24–7. 32	6.82 ± 1.72 6.44–7.20	6.62 ± 3.02 6.00-7.25	7.24 ± 2.83 6.67–7.79	7.91 ± 3.56 7.21–8.62	8.35 ± 4.00 7.47–9.23	8.18 ± 4.07 7.24–9.13
Calf skinfold (mm)	6.90 ± 2.48 6.31–7.48	7.30 ± 2.24 6.82–7.80	7.21 ± 4.11 6.37–8.06	8.11 ± 3.98 7.32–8.90	8.99 ± 4.62 8.07–9.90	9.84 ± 5.45 8.64–11.04	9.58 ± 4.63 8.50-10.66
Sum of skinfolds (mm)	13.68 ± 4.29 12.76–14.70	14.12 ± 3.47 13.36–14.89	13.84 ± 6.84 12.43–15.25	15.35 ± 6.35 14.08–16.61	16.90 ± 7.69 15.38–18.42	18.20 ± 8.80 16.26–20.13	17.76 ± 8.13 15.87–19.66
Fat (%)	9.34 ± 2.62 8.72–9.97	9.61 ± 2.19 9.15–10.08	9.44 ± 4.17 8.58–10.30	10.36 ± 3.88 9.59–11.13	11.31 ± 4.70 10.38–12.24	12.10 ± 5.37 10.92–13.23	11.84 ± 4.96 10.68-13.00
Predicted age at PHV (years)	12.40 ± 0.25 12.33–12.45	12.91 ± 0.22 12.87–12.96	13.35 ± 0.32 13.28–13.42	13.78 ± 0.33 13.71–13.84	14.25 ± 0.34 14.19–14.32	14.62 ± 0.42 14.53–14.71	14.92 ± 0.47 14.81–15.03
Estimated maturity timing (years)	5.35 ± 0.23 5.29–5.40	4.85 ± 0.25 4.80–4.91	4.32 ± 0.30 4.27–4.39	3.80 ± 0.36 3.72–3.87	3.16 ± 0.377 3.09–3.24	2.70 ± 0.44 2.60–2.79	1.92 ± 0.511 1.80–2.04

Anthropometrical measures

7 year old
n = 71

8 year old
n = 82

9 year old
n = 93

10 year old
n = 100

11 year old
n = 101

12 year old
n = 82

13 year old
n = 73

Chronological age (years)

7.04 ± 0.29

6.51–7.49

8.06 ± 0.26

7.54–8.49

9.02 ± 0.30

8.52–9.47

9.97 ± 0.28

9.50-10.49

11.08 ± 0.27

10.53–11.49

11.92 ± 0.30

11.50-12.49

13.00 ± 0.29

12.51–13.49

Body mass (kg)

22.89 ± 2.52

22.29–23.48

24.71 ± 2.68

24.13– 25.30

27.02 ± 4.79

26.04–28.01

29.43 ± 5.20

28.32–30.46

32.88 ± 4.92

31.90-33.85

35.28 ± 6.41

33.87–36.69

39.70 ± 6.95

38.08–41.33

Body stature (cm)

119.32 ± 4.30

118.30–120.33

124.29 ± 4.69

123.26-125.32

128.97 ± 5.99

127.73–130.20

132.91 ± 5.74

131.78-134.05

138.31 ± 5.81

137.16-139.46

141.99 ± 7.22

140.40-143.58

149.29 ± 7.67

147.50-151.08

BMI (kg/m²)

16.05 ± 1.28

15.75–16.35

15.98 ± 1.30

15.69–16.26

16.19 ± 2.10

15.76–16.62

16.58 ± 2.01

16.18–16.98

17.13 ± 1.84

16.76–17.50

17.39 ± 2.19

16.91–17.87

17.73 ± 2.03

17.20-18.27

Triceps skinfold (mm)

6.79 ± 2.28

6.24–7. 32

6.82 ± 1.72

6.44–7.20

6.62 ± 3.02

6.00-7.25

7.24 ± 2.83

6.67–7.79

7.91 ± 3.56

7.21–8.62

8.35 ± 4.00

7.47–9.23

8.18 ± 4.07

7.24–9.13

Calf skinfold (mm)

6.90 ± 2.48

6.31–7.48

7.30 ± 2.24

6.82–7.80

7.21 ± 4.11

6.37–8.06

8.11 ± 3.98

7.32–8.90

8.99 ± 4.62

8.07–9.90

9.84 ± 5.45

8.64–11.04

9.58 ± 4.63

8.50-10.66

Sum of skinfolds (mm)

13.68 ± 4.29

12.76–14.70

14.12 ± 3.47

13.36–14.89

13.84 ± 6.84

12.43–15.25

15.35 ± 6.35

14.08–16.61

16.90 ± 7.69

15.38–18.42

18.20 ± 8.80

16.26–20.13

17.76 ± 8.13

15.87–19.66

Fat (%)

9.34 ± 2.62

8.72–9.97

9.61 ± 2.19

9.15–10.08

9.44 ± 4.17

8.58–10.30

10.36 ± 3.88

9.59–11.13

11.31 ± 4.70

10.38–12.24

12.10 ± 5.37

10.92–13.23

11.84 ± 4.96

10.68-13.00

Predicted age at PHV (years)

12.40 ± 0.25

12.33–12.45

12.91 ± 0.22

12.87–12.96

13.35 ± 0.32

13.28–13.42

13.78 ± 0.33

13.71–13.84

14.25 ± 0.34

14.19–14.32

14.62 ± 0.42

14.53–14.71

14.92 ± 0.47

14.81–15.03

Estimated maturity timing (years)

5.35 ± 0.23

5.29–5.40

4.85 ± 0.25

4.80–4.91

4.32 ± 0.30

4.27–4.39

3.80 ± 0.36

3.72–3.87

3.16 ± 0.377

3.09–3.24

2.70 ± 0.44

2.60–2.79

1.92 ± 0.511

1.80–2.04