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Table 4 The mean, SD and range values of the angles

From: Photographic measurement of upper-body sitting posture of high school students: A reliability and validity study

Angles Normal Upright Slouched
  Mean SD Range (degrees) Mean SD Range (degrees) Mean SD Range (degrees)
Sagittal head angle 20.05 7.84 0 – 34.70 19.99 8.15 0.90 – 34.40 10.28 10.68 (-)15.90 – 34.20
Cervical angle 47.66 9.75 21.90 – 62.90 52.72 11.18 22.30 – 71.30 21.49 27.57 (-)34.10 – 53.40
Protraction/retraction angle 130.21 25.77 65.30 – 178.70 124.76 20.36 76.50 – 159.80 145.68 20.62 103.70 – 208.70
Thoracic angle 63.25 8.57 49.50 – 89.20 61.37 11.76 40.80 – 97.60 61.46 8.88 39.30 – 78.10
Arm angle 23.46 12.75 (-)5.00 – 50.30 24.21 12.09 3.30 – 60.90 32.72 10.34 14.50 – 48.80