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Table 2 Mean thoracic kyphosis angles (TKAs) and lumbar lordosis angles (LLAs), by sex and by age

From: Sagittal imbalance of the spine is associated with poor sitting posture among primary and secondary school students in China: a cross-sectional study

Sex

Age (years)

Sagittal angle of spine in natural standing position

TKA (°)

LLA (°)

Male

6

26.286(7.297)

−32.500(9.504)

7

34.583(9.053)

− 27.167(12.350)

8

37.372(9.722)

− 24.488(9.480)

9

36.797(8.944)

− 23.678(9.659)

10

35.868(8.731)

−24.015(9.770)

11

38.341(7.886)

−27.073(12.507)

12

35.364(8.355)

− 25.697(9.554)

13

31.383(5.968)

−28.243(8.667)

14

32.747(5.821)

−26.670(8.352)

15

34.273(5.147)

−25.955(6.433)

16

33.412(6.663)

−25.618(9.912)

17

31.500(6.658)

−23.750(9.912)

18

43.000(5.657)

−27.500(3.536)

Female

6

27.906(7.731)

−24.437(17.729)

7

30.833(8.809)

−23.738(12.057)

8

34.463(11.227)

−24.439(10.789)

9

33.939(10.509)

−23.653(8.430)

10

37.527(10.059)

−24.964(10.173)

11

37.119(8.674)

−25.619(10.138)

12

32.333(8.222)

−26.361(19.722)

13

28.247(6.134)

−26.194(13.193)

14

28.393(5.995)

−28.085(9.582)

15

30.423(4.884)

−26.462(7.495)

16

29.377(6.968)

−26.943(9.141)

17

24.000(9.539)

−34.667(7.234)

18

32.000(9.607)

−36.000(4.950)

  1. Data represent mean (standard deviation)