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Table 1 Comparison of minimum significant difference between methods of measurement (standard deviation in degrees between measurements, 1.96 x standard deviation used for minimum significant difference)

From: Accuracy and reliability of knee goniometry methods

User comparison

Standard deviation

p

1.96 x SD

Visual Estimation

8.94

0.996

14.31

Short arm goniometer

8.89

0.999

14.23

Long arm goniometer

4.91

0.973

9.62

Smartphone app

5.98

0.966

11.72

Halo Digital Goniometer

2.97

0.983

5.83