Table 1 Mean, standard deviation, and comparisons between different groups of low back pain (mild, moderate, and high) in relation to control for anthropometric characteristics and dance activities of adolescent dancers of classical ballet

Age (years)

15.0 ± 2.2

11.8–15.8

16.0 ± 1.3

14.7–16.4

15.5 ± 2.1

14.8–16.5

14.6 ± 2.1

13.7–15.8

0.116

Height (m)

1.6 ± 0.7

1.53–1.7

1.6 ± 0.6

1.55–1.65

1.6 ± 0.9

1.58–1.64

1.6 ± 0.7

1.57–1.62

0.980

Body mass (kg)

52.6 ± 8.5

41.5–60.0

54.6 ± 7.5

48.9–57.0

50.7 ± 6.8

48.3–55.8

50.5 ± 8.5

48.8–54.7

0.266

Body mass index (kg/m²)

20.0 ± 2.6

17.8–21.4

20.8 ± 2.6

19.6–21.5

19.5 ± 1.9

18.8–20.9

19.3 ± 2.7

19.1–21.2

0.310

Practice time (years)

9.2 ± 3.1

6.4–12.2

7.6 ± 3.5

8.0–11.6

7.7 ± 4.2

6.5–12.8

8.6 ± 3.8

6.6–11.4

0.503

Training frequency (h/week)

14.7 ± 11.8

9.8–16.7

14.2 ± 9.9

10.6–20.2

19.8 ± 10.0

15.3–23.6

13.9 ± 9.5

8.8–20.6

0.010^&*^#

Musculoskeletal injuries (%)

50%

–

75%

–

88%

–

40%

–

0.001^&*^#