Table 1.
Clinical features and tissue amount
| Sparse tissue (n = 49) | Medium tissue (n = 29) | Substantial tissue (n = 28) | p value | Test performed | |
|---|---|---|---|---|---|
| Surgical procedure | |||||
| • Biopsy (n) | 31% (15) | 7% (2) | 0% (0) | Fisher’s exact | |
| • Cytoreduction (n) | 43% (21) | 66% (19) | 68% (19) | ||
| • GTR (n) | 27% (13) | 28% (8) | 32% (9) | 0.003* | |
| Median preoperative total tumor volume (range) | 24.0 mL (1.7–92.9) | 33.1 mL (1.0–82.9) | 35.5 mL (1.5–243.5) | 0.176 | Kruskal-Wallis |
| Median preoperative contrast-enhancing volume (range) | 15.1 mL (1.0–53.4) | 15.7 mL (0.9–63.9) | 23.2 mL (1.4–215.4) | 0.246 | Kruskal-Wallis |
| Median number of tissue sections (range) | 2 (1–18) | 2 (2–19) | 4 (2–23) | < 0.001* | Kruskal-Wallis |
| Median tissue volume (range)a | 0.13 cm3 (0.02–3.66) | 1.36 cm3 (0.06–40.74) | 11.63 cm3 (2.88–42.85) | < 0.001* | Kruskal-Wallis |
GTR gross total resection, CI confidence interval, n absolute number of cases
aEstimated in 89 of the patients, tissue volume was not possible to estimate in the excluded cases due to inadequate descriptions
*Statistically significant, p ≤ 0.05
Distributions of the type of surgical procedure and preoperative MRI volumetrics across the tissue amount categories. The p values are from tests of association between the clinical features and tissue amount