Table 3:

The distributions of variables of patients with SBC in different MR imaging grades

Grade IGrade IIGrade IIIP Value
Age (yr)28a39a40a.06b
Largest diameter (mm)45a37a43a.08b
Blood loss (mL)500a800a800a.002c,d
Sex.45e
    Female142524
    Male192945
Location.79e
    OC7811
    Other264658
Lobulation.42e
    Y172439
    N163030
Blood supply.000d,e
    Abundant92848
    Poor242621
Texture.05e
    Soft222429
    Hard113040
Resection grade.43e
    >90%254449
    ≤90%81020
Histopathology.56e
    Conventional223043
    Chondroid112426
Postradiotherapy.39e
    Y474
    N294765
  • Note:—OC indicates occipitocervical; Y, yes; N, no.

  • a Median value.

  • b Variance analysis (Student–Newman-Keuls).

  • c Wilcoxon rank sum test.

  • d P < .05.

  • e χ2 test.