Table 3 Factors that affected to the size of intra-thoracic lymph nodes on computed tomographic images

Age

≤ 7 months

0.5536

–

–

≥7 months – 7 years

3.39 ± 0.53

≥7 years

4.03 ± 0.50

Sex

Overall lymph nodes

0.0425^*

 Male

4.41 ± 0.63

 Female

3.31 ± 0.43

Sternal lymph node

0.7000

 Male

4.56 ± 0.82

 Female

3.30 ± 1.29

Cranial mediastinal lymph node

0.2546

 Male

5.13 ± 1.49

 Female

3.47 ± 0.63

Tracheobronchial lymph node

0.4762

 Male

3.87 ± 0.96

 Female

2.99 ± 1.57

Gonadal status

0.5806

Intact

4.33 ± 1.03

Gonadectomy

3.76 ± 0.41

Body weight

Overall;

3.82 ± 0.38

0.2344

 Range: 1.50–5.70 kg

Sternal lymph node;

3.93 ± 0.74

0.7632

 Range: 3.10–5.70 kg

Cranial mediastinal lymph node;

4.02 ± 0.65

0.2692

 Range: 2.80–5.70 kg

Tracheobronchial lymph node;

3.51 ± 0.62

0.2684

 Range: 2.00–5.70 kg

Body condition score

Overall;

3.82 ± 0.38

0.1841

 Range: 2.0–5.0

Sternal lymph node:

3.93 ± 0.74

0.3138

 Range: 3.0–5.0

Cranial mediastinal lymph node;

4.02 ± 0.65

0.0755

 Range: 3.0–5.0

Tracheobronchial lymph node;

3.51 ± 0.62

0.2998

 Range: 2.0–5.0