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. 2012 Jul 7;12:15. doi: 10.1186/1471-2342-12-15

Table 2.

The measured CSAs of the control, idiopathic, diabetic and DPN groups

  Control hands (n = 32) Idiopathic CTS hands (n = 38) Diabetic CTS hands (n = 38) DPN CTS hands (n = 16) p value1 p value2 p value3
i4
 12.6 ± 3.0 (12.0, 6.0-19.0)
 17.5 ± 6.4 (16.5, 8.0-39.0)
 20.4 ± 5.4 (19.5, 13.0-34.0)
 20.9 ± 13.8(15.5, 8.4-62.0)
 0.015*
 0.109
 0.000*
i3
 12.2 ± 2.9 (12.0, 6.0-19.0)
 16.3 ± 5.8 (15.5, 8.0-33.0)
 19.3 ± 5.5 (19.0, 10.0-31.0)
 19.0 ± 9.1 (15.5, 8.4-43.0)
 0.015*
 0.310
 0.000*
i2
 11.5 ± 2.5 (11.0, 7.0-18.0)
 12.5 ± 3.7 (12.0, 6.0-29.0)
 14.2 ± 3.9 (13.5, 9.0-24.0)
 13.6 ± 5.9 (11.5, 9.0-34.0)
 0.026*
 0.242
 0.010*
i1
 10.8 ± 2.1 (10.2, 7.0-17.0)
 14.0 ± 4.8 (13.0, 8.0-28.0)
 15.5 ± 4.4 (14.8, 7.7-26.1)
 12.7 ± 3.1 (13.0, 7.0-21.0)
 0.105
 0.043*
 0.000*
w
 11.8 ± 2.6 (11.0, 8.0-19.0)
 16.2 ± 4.5 (15.0,11.0-31.0)
 17.9 ± 6.6 (16.0, 8.1-45.8)
 14.8 ± 4.7 (13.5, 8.0-28.0)
 0.217
 0.039*
 0.000*
o1
 10.6 ± 2.4 (10.0, 6.0-16.0)
 14.0 ± 3.7 (13.4, 8.0-23.0)
 15.4 ± 5.9 (14.0, 7.0-42.8)
 14.3 ± 5.5 (13.0, 7.0-30.0)
 0.237
 0.458
 0.000*
o2
 11.0 ± 2.6 (10.5, 7.0-17.0)
 12.2 ± 2.6 (12.0, 8.0-19.5)
 13.8 ± 4.0 (13.0, 8.6-29.0)
 12.8 ± 5.3 (12.5, 7.4-29.0)
 0.090
 0.181
 0.006*
o3 10.0 ± 2.4 (9.5, 7.0-15.0) 10.8 ± 2.2 (10.4, 6.0-16.0) 12.4 ± 3.5 (11.7, 7.0-20.0) 12.2 ± 4.0 (10.5, 8.7-25.0) 0.060 0.601 0.017*

CTS = carpal tunnel syndrome; CSA = cross-sectional area; DPN = diabetic polyneuropathy.

The data shown are mean ± standard deviation (SD) (median, range).

Unit of CSA = mm2.

i4, i3, i2, i1, w, o1, o2, and o3 = the 8 points marked.

p value1 = a comparison between the idiopathic and the diabetic CTS hands using the Mann–Whitney U test.

p value2 = a comparison between the diabetic and the DPN CTS hands using the Mann–Whitney U test.

p value3 = a comparison among control, idiopathic CTS, the diabetic and the DPN CTS hands using the Kruskal-Wallis test.

* = p < 0.05.