Table 4 Effect of ultrasound parameters of TNs on TSR of RFA

Age group

Young (18–44)

1.406077

0.69536

0.69

0.491

0.5334046

3.706479

Middle-aged (45–59)

1.843387

0.9301306

1.21

0.225

0.6856777

4.955793

Elder (≥ 60)

Reference group

Reference group

Reference group

Reference group

Reference group

Reference group

Gender

Male

2.839874

1.123343

2.64

0.008

1.307968

6.165967

Female

Reference group

Reference group

Reference group

Reference group

Reference group

Reference group

Nodule size

Small (< 15 ml)

3.020012

1.144465

2.92

0.004

1.436935

6.347174

Medium (15–30 ml)

0.9743401

0.3984701

-0.06

0.949

0.437119

2.171808

Large (> 30 ml)

Reference group

Reference group

Reference group

Reference group

Reference group

Reference group

Nodule location

Right lobe

Reference group

Reference group

Reference group

Reference group

Reference group

Reference group

Left lobe

2.036833

0.6714487

2.16

0.031

1.067466

3.886483

Isthmus

1.955425

0.9727208

1.35

0.178

0.7375868

5.184048

Nodule echogenicity

Isoechoic

3.26388

1.284177

3.01

0.003

1.509482

7.05733

Hypoechoic

5.363904

3.15472

2.86

0.004

1.693777

16.98657

Hyperechoic

Reference group

Reference group

Reference group

Reference group

Reference group

Reference group

Anechoic

3.228531

3.866898

0.98

0.328

0.3086728

33.76849

Nodule vascularity

Iso-vascular

1.582261

0.5854298

1.24

0.215

0.7661916

3.267526

Hypo-vascular

Reference group

Reference group

Reference group

Reference group

Reference group

Reference group

Hyper-vascular

4.149143

1.907493

3.10

0.002

1.685132

10.21605

Nodule tissue type

Solid

0.406981

0.134009

2.73-

0.006

0.2134489

0.7759866

Cystic^a

0.1499492

0.0976556

2.91-

0.004

0.04184

0.5373981

mixed

Reference group

Reference group

Reference group

Reference group

Reference group

Reference group

Regression fitness indicators

 Psudue (R²)

0.1504

 Prob.chi2

0.0000

 Log-likelihood

-179.04787