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Table 2 Distribution of anatomical measurements made on plain pelvic radiographs according to sex

From: The trochanteric double contour is a valuable landmark for assessing femoral offset underestimation on standard radiographs: a retrospective study

 

Male

Female

P-value

Mean ± SD

Range

Mean ± SD

Range

Antetorsion (°)

8.0 ± 10.0

(−14.5, 26)

10.6 ± 9.3

(− 8.7, 35)

0.3200

Full neck length (mm)

100.8 ± 7.0

(88.4, 119)

88 ± 4.7

(78.8, 99)

<  0.0001

Femoral head diameter (mm)

48.4 ± 2.7

(43.6, 53)

41.7 ± 2.4

(37.7, 48)

<  0.0001

D1 (mm)

11.7 ± 4.5

(2.3, 20)

5.8 ± 3.1

(1.5, 15)

<  0.0001

D2 (mm)

6.6 ± 2.9

(1.4, 13)

3.5 ± 2.0

(0.6, 8)

<  0.0001

D3 (mm)

10.3 ± 3.6

(4.3, 18)

6.6 ± 2.4

(2.4, 12)

0.0001

Projection error (%)

19.5 ± 2.7

(15.3, 27)

21.4 ± 4.1

(13.2, 30)

0.0240

  1. SD standard deviation
  2. P-value = Shapiro-Wilk test p-value
  3. D = width of the double contour (including line thickness) at three levels perpendicular to the femoral axis, where D1 lies at the femoral neck level, D3 indicates the maximum thickness of the double line and D2 indicates the minimum thickness between D1 and D3
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BMC Musculoskeletal Disorders

ISSN: 1471-2474

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