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Table 1 Patient characteristics in MR and multi-modality cohorts

From: Comprehensive integrated analysis of MR and DCE-MR radiomics models for prognostic prediction in nasopharyngeal carcinoma

Characteristic

MR cohort

Multi-modality cohort

Training set (n = 202)

Test set (n = 87)

Training set (n = 102)

Test set (n = 43)

Sex

 Male

144 (71.3%)

65 (74.7%)

75 (73.5%)

29 (67.4%)

 Female

58 (28.7%)

22 (25.3%)

27 (26.5%)

14 (32.6%)

Age

 Median (IQR)

48 (41–56)

49 (40–57)

49 (42–57)

51 (40–57)

 ≤ 40

50 (24.8%)

23 (26.4%)

19 (18.6%)

12 (27.9%)

 40–50

67 (33.2%)

48 (55.2%)

63 (61.8%)

25 (58.1%)

 > 50

85 (42%)

16 (18.4%)

20 (19.6%)

6 (14.0%)

T stage

 T1

7 (3.5%)

1 (1.2%)

3 (2.9%)

0 (0.0%)

 T2

54 (26.7%)

32 (36.8%)

29 (28.4%)

6 (14.0%)

 T3

84 (41.6%)

25 (28.7%)

48 (47.1%)

20 (46.5%)

 T4

57 (28.2%)

29 (33.3%)

22 (21.6%)

17 (39.5%)

N stage

 N0

12 (5.9%)

6 (6.9%)

8 (7.8%)

1 (2.3%)

 N1

49 (24.3%)

23 (26.4%)

28 (27.5%)

8 (18.6%)

 N2

106 (52.5%)

47 (54.0%)

48 (47.1%)

19 (44.2%)

 N3

35 (17.3%)

11 (12.7%)

18 (17.6%)

15 (34.9%)

M stage

 M0

199 (98.5%)

84 (96.6%)

100 (98.0%)

42 (97.7%)

 M1

3 (1.5%)

3 (3.4%)

2 (2.0%)

1 (2.3%)

Overall stage

 I

2 (1.0%)

0 (0.0%)

0 (0.0%)

0 (0.0%)

 II

18 (8.9%)

14 (16.1%)

11 (10.8%)

1 (2.3%)

 III

93 (46.0%)

32 (36.8%)

57 (55.9%)

19 (44.2%)

 IV

86 (42.6%)

37 (42.5%)

34 (33.3%)

23 (53.5%)

 V

3 (1.5%)

4 (4.6%)

0 (0.0%)

0 (0.0%)

Follow-up time (mo)

 Median (IQR)

49 (23–61)

55 (34–63)

11 (7–17)

10 (6–19)

  1. Independent-sample t-test was applied for continuous variables, and \({\chi }^{2}\) test was applied for categorical variables. No significant differences were found between the MR and multi-modality cohorts in terms of sex, age, T stage, and N stage (p = 0.315–0.987). The M stage, overall stage, and follow-up time differed significantly between the two cohorts (p = 2.96 × 10–4, 0.015, and 2.20 × 10–16, respectively). IQR interquartile range