Table 4 Correlation between radiographic features and lymph node status.

HRCT

42

306

Size^a

2.20 ± 0.51

1.90 ± 0.58

−3.143

0.002

Size stratification

9.556

0.008

   ≤1 cm

0

21

   1–2 cm

17

173

   >2 cm

25

112

   GGO

0

52

43.980

<0.001

   PSN

4

142

   SN

38

112

Location

4.579

0.032

   Center

12

47

   Periphery

30

259

Contour

10.127

0.006

   Smooth

2

67

   Lobular

20

156

   Spiculated

20

86

Necrosis

1.482

0.223

   Yes

6

26

   No

36

280

GGOc proportion^a

(5 ± 6) %

(24 ± 25) %

11.522

<0.001

Sc proportion^a

(82 ± 17) %

(42 ± 32) %

−12.799

<0.001

PET/CT

137

10

SUV_max

5.23 ± 2.71

3.20 ± 2.77

−3.510

0.001