Table 5 Factors associated with operating time in multivariate analysis

From: Impact of body mass index on robotic transaxillary thyroidectomy

Operation

 

Associated factors

Beta coefficient

95% confidence interval

p value

Working space time

Less-than-BTT

Sex (male)

3.97

2.10–5.85

<0.001*

  

BMI

   
  

25–29.99

1.24

−0.40–2.87

0.138

  

≥30

8.66

4.49–12.83

<0.001*

 

BTT

Tumor size (cm)

1.39

0.09–2.69

0.036*

  

Sex (male)

4.98

2.49–7.47

<0.001*

  

BMI

   
  

25–29.99

1.05

−1.03–3.12

0.324

  

≥30

5.16

0.29–10.03

0.038*

Console time

Less-than-BTT

Number of CLNs retrieved

0.34

0.12–0.56

0.003*

  

BMI

   
  

25–29.99

−0.30

−2.48–1.88

0.786

  

≥30

5.12

−0.45–10.70

0.072

 

BTT

Tumor size (cm)

2.28

0.25–4.30

0.028*

  

Number of CLNs retrieved

0.53

0.24–0.83

<0.001*

  

Sex (male)

8.55

4.69 12.41

<0.001*

  

BMI

   
  

25–29.99

2.76

−0.47–5.99

0.094

  

≥30

0.34

−7.12–7.80

0.928

Total operating time

Less-than-BTT

Tumor size (cm)

5.54

2.00–9.09

0.002*

  

Extracapsular invasion

2.57

0.02–5.13

0.048*

  

Sex (male)

5.94

1.95–9.94

0.004*

  

BMI

   
  

25–29.99

0.12

−3.37–3.61

0.946

  

≥30

18.54

9.63–27.46

<0.001*

 

BTT

Tumor size (cm)

4.18

1.29–7.08

0.005*

  

Number of CLNs retrieved

0.53

0.11–0.95

0.013*

  

Sex (male)

20.67

15.13–26.21

<0.001*

  

BMI

   
  

25–29.99

2.33

−2.28–6.93

0.32

  

≥30

−2.15

−12.83–8.53

0.69

  1. All times in minutes; BMI, body mass index, in kg/m2; BTT, bilateral total thyroidectomy; CLN, central lymph node; *statistically significant at p < 0.05.