Table 1 Clinical characteristics of the study population in discovery and validation set
From: MRI-based machine learning models predict the malignant biological behavior of meningioma
|  | Training set (n = 224) | Validation set (n = 89) |
|---|---|---|
Age, years | 56.0 [48.3–64.0] | 62.0 [53.0-70.5] |
Sex, n | Â | Â |
 Female | 160 (71.4%) | 61 (68.5%) |
 Male | 64 (28.6%) | 28 (31.5%) |
WHO grade, n | Â | Â |
 I | 181 (80.8%) | 62 (69.7%) |
 II/ III | 43 (19.2%) | 27 (30.3%) |
Ki-67 index, n | Â | Â |
 Ki-67 < 5 | 157 (70.1%) | 59 (66.3%) |
 Ki-67 ≥ 5 | 67 (29.9%) | 30 (33.7%) |