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Table 2 The association between measurement parameters and surgical methods

From: Anatomical basis for the choice of laparoscopic surgery for low rectal cancer through the pelvic imaging data—a cohort study

Parameters Mean ± SD (min, max) or median (four quantile interval) F or Z P
Transverse diameter of tumor (cm) 3.363 (2.903, 3.825) − 0.452 0.651
Anal margin distance (cm) 4.868 (3.20, 5.69) − 6.065 0.000
a 10.97 ± 1.15 (8.20, 14.2) − 0.108 0.914
b 13.4 ± 0.83 (11.67, 15.85) 1.392 0.169
c 12.48 (12.17, 13.06) − 0.814 0.416
d 7.43 (6.48, 7.80) − 2.024 0.043
e 22.83 ± 1.63 (18.89, 26.51) 1.979 0.052
f 11.71 (11.24, 12.49) − 0.549 0.583
g 10.00 (9.12, 10.92) − 1.273 0.203
h 8.25 (7.92, 8.60) − 2.003 0.045
i 7.08 ± 0.87 (5.43, 9.29) −0.805 0.424
j 5.32 ± 0.54 (4.39, 6.54) 1.625 0.109
k 8.92 ± 0.51 (7.82, 10.37) 0.497 0.621
l 8.53 ± 0.81 (6.73, 10.92) − 0.947 0.347
m 5.93 ± 0.97 (4.05, 8.16) − 0.595 0.554
n 9.13 ± 0.99 (6.43, 11.18) 0.366 0.716
o 11.04 ± 1.52 (7.57, 14.27) 0.389 0.698
Ds 15.04 ± 1.12 (12.98, 17.60) 3.013 0.004
v 5.00 (4.76, 5.34) − 0.529 0.597
Wy 11.83 ± 1.13 (9.16, 13.9) 1.914 0.06
z 7.76 ± 0.53 (6.36, 8.87) 2.738 0.008
y 6.27 ± 0.79 (4.21, 8.14) 1.951 0.055
1 114.14 ± 8.09 (93.37, 129.20) − 0.243 0.809
2 111.86 (32.55, 67.81) − 0.108 0.914
3 124.15 (141.48, 189.50) − 0.16 0.873
4 96.76 ± 7.25 (81.86, 113.87) 1.102 0.274
5 91.14 ± 7.99 (72.27, 113.12) − 0.92 0.361
q 11.30 ± 1.51 (7.80, 14.78) − 3.505 0.001
r 8.25 (7.31, 9.37) − 6.525 0.000
s 4.05 (3.25, 4.92) − 4.674 0.000
p 8.58 ± 1.01 (6.32, 11.18) 1.663 0.101
u 4.53 (3.94, 5.33) − 3.297 0.001
T1 7.78 (38.1, 48.14) − 5.008 0.000
T2 43.43 (32.55, 67.81) − 5.133 0.000
T3 169.11 (141.48, 189.50) − 5.606 0.000
T4 28.70 ± 6.55 (13.31, 40.27) 4.937 0.000
T5 63.59 (59.78, 71.72) 2.676 0.009