Table 1 Measurement results of the NSA.

From: Comparing two different automatic methods to measure femoral neck-shaft angle based on PointNet++ network

 

Manual results

2D automatic results

3D automatic results

Error.a

Error.b

Error.c

Degree (°)

126.76 ± 4.859 (114.04–139.90)

126.90 ± 4.980 (112.88–139.13)

126.88 ± 4.846 (113.08–139.82)

1.68 ± 1.10 (0.01–4.99)

2.71 ± 1.04 (0.24–5.10)

2.58 ± 1.74 (0.02–7.34)

P value

–

–

–

0.86

0.88

0.98

Average accuracy

–

–

–

98.67%

97.86%

98.00%

  1. Data are presented as mean ± SD. Maximum and minimum values are indicated in brackets.
  2. a represents the comparison between manual results and 2D automatic results. b represents the comparison between manual results and 3D automatic results. c represents the comparison between 2D automatic results and 3D automatic results. a, b, and c represents the same meanings in terms of the error, P value, and accuracy.
  3. P value was calculated by t test between any two of three measurement results.
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