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Table 1 Baseline characteristics of 219 patients with pulmonary nodules undergoing 135 hookwire and 151 methylene blue localizing procedures

From: Comparative study of the effect of preoperative hookwire and methylene blue localization techniques on post-operative hospital stay and complications in thoracoscopic pulmonary nodule surgery

Variable

Hookwire technique

107 patients (48.86%)

Methylene blue technique

112 patients (51.14%)

p value

N (%)

N (%)

Age (years)#

54 (10.86)

54.46 (11.06)

0.8075

Gender

  

0.5860

 Male

43 (40.19%)

41 (36.6%)

 

 Female

64 (59.81%)

71 (63.4%)

 

Patient position

  

< 0.0001*

 Supine

39 (36.45%)

15 (11.36%)

 

 Prone

30 (28.04%)

29 (21.97%)

 

 Right lying

21 (19.63%)

32 (24.24%)

 

 Left lying

17 (15.88%)

56 (42.43%)

 

Nodule location

  

0.3626

 Right upper lobe

51 (37.78%)

49 (32.45%)

 

 Right middle lobe

6 (4.44%)

13 (8.61%)

 

 Right lower lobe

23 (17.04%)

35 (23.18%)

 

 Left upper lobe

34 (25.19%)

35 (23.18%)

 

 Left lower lobe

44 (8.32%)

19 (12.58%)

 

Nodule count

  

0.4834

 One

83 (77.57%)

81 (72.32%)

 

 Two

20 (18.69%)

23 (20.54%)

 

 Three

4 (3.74%)

8 (7.14%)

 

Complications

  

0.0126*

 None

115 (85.19%)

140 (92.72%)

 

 Pneumothorax

13 (9.63%)

11 (7.28%)

 

 Hemoptysis

7 (5.18%)

0 (0%)

 

Nodule diameter (mm)#

8 (4)

9 (6)

0.0561

Distance between nodule and pleural surface (mm)#

9 (11)

10 (12)

0.1364

Localization time (min)#

8 (3)

7 (3)

0.0007*

Localization-operation interval (hours)#

17 (3.5)

17 (6)

0.7142

Duration of surgery (min)#

114 (92)

95 (61.5)

0.0446*

Hospitalization time (days)#

6 (3)

5 (2)

< 0.0001*

  1. N number, % percentage, IQR Interquartile range, mm millimeter, min minutes
  2. #For continuous variables, summary statistics have been calculated in the form of either the mean and standard deviation for normally distributed variables (such as age), or the median and interquartile ranges for non-normally distributed variables (such as nodular diameter, nodular distance from the pleura, localization time, localization-operation interval, duration of surgery, and hospitalization time
  3. For categorical variables (such as gender, patient position, nodule location, nodule number, and complications), the summary statistics were calculated in the form of the frequency and percentage of the total observations, whether these were patients or localization procedures
  4. *Statistically significant