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Table 5 Reliability Findings: ICC's and SEM values of all angles, postures and genders

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

Reliability Sagittal head angle Cervical angle Protraction/retraction angle Thoracic angle Arm angle
95% Lower and Upper interval 0.82 – 0.96 0.86 – 0.96 0.74 – 0.93 0.60 – 0.97 0.95–0.94
All angles (5 reliability photos) 0.98 0.98 0.94 0.96 0.99
Upright (n = 13) 0.97 (0.93–0.99) 0.98 (0.55–0.93) 0.92 (0.79–0.93) 0.97 (0.83–0.99) 0.99 (0.97–0.99)
Normal (n = 13) 0.97 (0.92–0.97) 0.78 (0.56–0.94) 0.91 (0.78–0.92) 0.92 (0.84–0.98) 0.98 (0.96–0.98)
Slouched (n = 13) 0.98 (0.99–0.95) 0.98 (0.96–0.98) 0.99 (0.97–0.99) 0.97 (0.93–0.99) 0.98 (0.95–0.98)
Female (n = 20) 0.96 (0.92–0.96) 0.99 (0.98–0.99) 0.94 (0.88–0.97) 0.94 (0.89–0.97) 0.98 (0.97–0.99)
Male (n = 19) 0.99 (0.97–0.99) 0.96 (0.91–0.98) 0.95 (0.88–0.96) 0.97 (0.94–0.98) 0.97 (0.95–0.98)
SEM (in degrees) 3.50 8.06 11.09 4.04 3.33