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Table 1 Patient characteristics

From: Clinical significance of NF2 alteration in grade I meningiomas revisited; prognostic impact integrated with extent of resection, tumour location, and Ki-67 index

Variable

N = 281

Non–recurrent (N = 236)

Recurrent (N = 45)

Age

57.4 ± 13.2

58.4 ± 12.4

52.5 ± 16.2

Sex

Female: 209 (74.4%)

Female: 181 (76.7%)

Female: 28 (62.2%)

Follow–up (years)

5.3 ± 4.5

5.6 ± 4.6

4.1 ± 3.7

Tumor location

Supratentorial lesion

188 (66.9%)

152 (64.4%)

36 (80.0%)

Infratentorial lesion

93 (33.1%)

84 (35.6%)

9 (20.0%)

Extent of resection

GTR

236 (84.0%)

209 (88.6%)

27 (60.0%)

STR

45 (16.0%)

27 (11.4%)

18 (40.0%)

Ki-67 index

2.5 ± 2.0

2.2 ± 1.6

3.7 ± 3.2

Driver gene mutation

“NF2” (NF2 variant or 22q loss)

152 (54.1%)

121 (51.3%)

31 (68.9%)

“Non-NF2”

129 (45.9%)

115 (48.7%)

14 (31.1%)

Subgroups encompassing driver gene mutation and tumor location

“Supratentorial NF2”

109 (38.8%)

79 (33.5%)

30 (66.7%)

“Infratentorial NF2”

43 (15.3%)

42 (17.8%)

1 (2.2%)

“Supratentorial non–NF2”

79 (28.1%)

73 (30.9%)

6 (13.3%)

“Infratentorial non-NF2”

50 (17.8%)

42 (17.8%)

8 (17.8%)