Table 2.
Prevalence of incorrect posture among Chinese adolescents stratified by the occurrence of AIS (N = 7,858).
| Variables |
Non-AIS group (Cobb <10°) |
AIS group (Cobb ≥10°) |
χ2 | P |
|---|---|---|---|---|
| n (%) | n (%) | |||
| Total | 3,987 (100.0) | 3,871 (100.0) | ||
| Incorrect posturea | ||||
| Shoulder-height difference | 1,475.79 | <0.001 | ||
| Normal | 3,469 (87.0) | 1,796 (46.4) | ||
| Left shoulder height | 327 (8.2) | 1103 (28.5) | ||
| Right shoulder height | 191 (4.8) | 972 (25.1) | ||
| Scapula tilt | 2,460.31 | <0.001 | ||
| Normal | 3,405 (85.4) | 1,173 (30.3) | ||
| Tilt to the left | 379 (9.5) | 1,529 (39.5) | ||
| Tilt to the right | 203 (5.1) | 1,169 (30.2) | ||
| Lumbar concave | 1,533.17 | <0.001 | ||
| Normal | 3,624 (90.9) | 1,970 (50.9) | ||
| Left concave | 140 (3.5) | 794 (20.5) | ||
| Right concave | 223 (5.6) | 1,107 (28.6) | ||
| Pelvic tilt | 582.34 | <0.001 | ||
| Normal | 3,832 (96.1) | 3,039 (78.5) | ||
| Tilt to the left | 104 (2.6) | 298 (7.7) | ||
| Tilt to the right | 51 (1.3) | 534 (13.8) | ||
| Flat back | 21.51 | <0.001 | ||
| Normal | 3,979 (99.8) | 3,832 (99.0) | ||
| Abnormal | 8 (0.2) | 39 (1.0) | ||
| Thoracic kyphosis | 62.52 | <0.001 | ||
| Normal | 3,947 (99.0) | 3,728 (96.3) | ||
| Abnormal | 40 (1.0) | 143 (3.7) | ||
| Lumbar kyphosis | 2.44 | 0.118 | ||
| Normal | 3,971 (99.6) | 3,863 (99.8) | ||
| Abnormal | 16 (0.4) | 8 (0.2) | ||
| Angle of thoracic rotation | 1,209.99 | <0.001 | ||
| Normal (ATR: 0°-4°) | 3,800 (95.3) | 2,474 (63.9) | ||
| Rotate to the left (ATR ≥5°) | 80 (2.0) | 395 (10.2) | ||
| Rotate to the right (ATR ≥5°) | 107 (2.7) | 1,002 (25.9) | ||
| Angle of thoracolumbar rotation | 185.08 | <0.001 | ||
| Normal (ATR: 0°-4°) | 3,883 (97.4) | 3,484 (90.0) | ||
| Rotate to the left (ATR ≥5°) | 40 (1.0) | 186 (4.8) | ||
| Rotate to the right (ATR ≥5°) | 64 (1.6) | 201 (5.2) | ||
| Angle of lumbar rotation | 1,161.88 | <0.001 | ||
| Normal (ATR: 0°-4°) | 3,636 (91.2) | 2,237 (57.8) | ||
| Rotate to the left (ATR ≥5°) | 271 (6.8) | 1,212 (31.3) | ||
| Rotate to the right (ATR ≥5°) | 80 (2.0) | 422 (10.9) |
AIS, adolescent idiopathic scoliosis; n, number; ATR, angle of trunk rotation.
a
Incorrect posture was defined as a participant who was screened out one or more to the following physical signs: shoulder-height difference, scapula tilt, lumbar concave, pelvic tilt, flat back, thoracic kyphosis, lumbar kyphosis, angle of thoracic rotation ≥5°, angle of thoracolumbar rotation ≥5°, angle of lumbar rotation ≥5°.