[Retracted] Prediction of Cancer-Specific Survival of Brainstem Glioma in Children Based on Risk Stratification Model

Table 1

Patient demographics and clinicopathological characteristics of the study population.

Factors	Entire cohort ()		Training cohort ()		Validation cohort ()
		%		%		%
Age at diagnosis, years
Median	6		6		6
Range	0–12		0–12		0–12
Race
White	596	74.0	426	75.3	170	70.8
Black	138	17.1	101	17.8	37	15.4
Other	72	8.9	39	6.9	33	13.8
Sex
Male	389	48.3	278	49.1	111	46.2
Female	417	51.7	288	50.9	129	53.8
Year of diagnosis
1998–2008	457	56.7	311	54.9	146	60.8
2009–2016	349	43.3	255	45.1	94	39.2
Tumor size, diameter, cm
≤3	87	10.8	54	9.5	33	13.8
>3	265	32.9	197	34.8	68	28.3
Unknown	454	56.3	315	55.7	139	57.9
Histologic grade
Well-differentiated	10	1.24	8	1.4	2	0.8
Moderately differentiated	25	3.1	17	3	8	3.3
Poorly differentiated	10	1.24	7	1.24	3	1.3
Undifferentiated	22	2.73	16	2.8	6	2.5
Unknown	739	91.7	518	91.5	221	92.1
Stage
Localized	720	89.3	506	89.4	214	89.2
Regional	76	9.4	51	9.0	25	10.4
Distant	10	1.2	9	1.6	1	0.4
Surgery
None	781	96.9	551	97.3	230	95.8
Yes	25	3.1	15	2.7	10	4.2
Radiotherapy
None	239	29.6	169	29.9	70	29.2
Yes	567	70.4	397	70.1	170	70.8
Chemotherapy
None	446	55.3	310	54.8	136	56.7
Yes	360	44.7	256	45.2	104	43.3
Median follow-up, months	11		11		11