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Table 1 Demographic characteristics of subjects

From: Body landmarks and genetic algorithm-based approach for non-contact detection of head forward posture among Chinese adolescents: revitalizing machine learning in medicine

Items

FHP a (n = 1024)

Normal (n = 627)

Gender (Female/Male)

542/482

331/296

singleton (Yes/No)

773/251

296/332

Age (years old)

12.08 ± 1.15

12.09 ± 1.17

Height (cm)

160.38 ± 9.22

158.18 ± 11.09

Mass (kg)

55.48 ± 16.16

54.18 ± 15.43

Muscle Mass (kg)

39.68 ± 8.96

38.58 ± 8.54

Fat-Free Mass (kg)

42.49 ± 9.37

41.31 ± 8.95

Skeletal Muscle Mass (kg)

23.81 ± 5.38

23.15 ± 5.12

  1. a FHP denotes forward head posture