Table 3 Comparison of factors of dysphagia after surgeries

Sex (male/female)^b

78/61

26/16

Age (y)^a

52.71 ± 9.98

50.31 ± 6.41

BMI^a

23.75 ± 2.92

24.67 ± 3.29

Diabetes mellitus (yes/none)^b

5/134

2/40

Hypertension (yes/none)^b

2/127

5/37

Smoking (yes/none)^b

31/108

20/22

Alcohol consumption (yes/none)^b

45/94

17/25

Intraoperative time (min)^a

147.60 ± 17.23

150.43 ± 18.60

Estimated blood loss (ml)^a

80.72 ± 78.73

58.10 ± 22.87

Prevertebral soft-tissue swelling (mm)^a

5.52 ± 0.67

6.41 ± 0.87

dO-C₂A (°)^a

−0.37 ± 7.68

−0.91 ± 7.22

dC_2–7A (°)^a

−2.88 ± 9.69

4.37 ± 6.82

The highest segment involved in the surgery^a

6.15 ± 0.79

6.29 ± 0.77

Number of surgery segments^a

1.91 ± 0.76

1.81 ± 0.55