Table 7 Receiver operating characteristic (ROC) analysis for all tests as a function of the age brackets for female group

Trunk flexor muscles

140.6 ± 63.1**

97.2 ± 66.6

0.001

0.719

0.615‑0.823

< 0.001

Back extensor muscles

212.6 ± 92.9**

154.7 ± 95.9

0.002

0.712

0.610‑0.815

< 0.001

Right quadratus lumborum muscles

96.6 ± 36.6***

55.5 ± 30.1

< 0.001

0.818

0.733‑0.904

< 0.001

Left quadratus lumborum muscles

96.5 ± 33.9***

57.2 ± 27.7

< 0.001

0.816

0.733‑0.898

< 0.001

Quadriceps muscles

88.74 ± 29.7***

64.8 ± 32.2

< 0.001

0.722

0.620‑0.824

< 0.001

Hamstrings muscles

261.4 ± 84.0***

189.3 ± 92.8

< 0.001

0.749

0.651‑0.847

< 0.001

Back muscles

212.5 ± 65.6***

155.8 ± 84.7

< 0.001

0.730

0.627‑0.832

< 0.001

Chest muscles

74.5 ± 27.2***

49.8 ± 25.9

< 0.001

0.772

0.677‑0.867

< 0.001