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Table 2 Mean ± SD, reliability coefficient and SEM of knee extentison degree mesured by electro goniometer and universal goniametr (n = 45)

From: Universal goniometer and electro-goniometer intra-examiner reliability in measuring the knee range of motion during active knee extension test in patients with chronic low back pain with short hamstring muscle

Scale First assessment Mean ± SD Second assessment Mean ± SD Third assessment Mean ± SD ICC (95% CI) SEM°
Electro-goniometer 143.81 ± 22.69 146.67 ± 19.45 147.29 ± 18.94 0.99 (0.98–0.99) 2.16°
Universal goniometer 154.14 ± 7.01 155.76 ± 7.69 157.48 ± 6.83 0.96 (0.94–0.96) 1.04°
  1. ICC (95% Confidence Interval) was reported/ ICC: Intra-class correlation coefficient/ SEM: Standard error of measurements