Table 1 Case demographics and clinical characteristics.

From: Apparent diffusion coefficient as a prognostic factor in clival chordoma

 

Aggressive group (N = 9)

Stable group (N = 21)

P-value

Age at first operation (year)

42.11 ± 14.54

51.81 ± 13.37

0.087

Male

6 (66.7%)

10 (47.6%)

0.440

Pathology (Classic chordoma)

8 (88.9%)

20 (95.2%)

0.517

Extent of tumor removal (GTR + NTR)

3 (33.3%)

19 (90.5%)

0.003

Radiotherapy (Proton)

4 (44.4%)

9 (42.9%)

1

Brainstem extension (at first MRI)

9 (100%)

15 (71.4%)

0.141

Average operation number (number/patient)

2.67 ± 1.32

1.19 ± 0.40

0.002

Mean ADC (10−6 mm2/s)

1091.78 ± 147.59

1411.24 ± 256.74

 < 0.001

Maximum ADC (10−6 mm2/s)

1485.44 ± 190.06

1757.90 ± 274.14

0.012

Minimum ADC (10−6 mm2/s)

702.11 ± 144.95

1125.43 ± 301.78

 < 0.001

  1. ADC apparent diffusion coefficient, GTR gross total resection, MRI magnetic resonance imaging, NTR near total resection, SD standard deviation. Variables are presented as mean ± standard deviation or number (percent).
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