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Table 2 Mean values of lymph node yield by different departments and periods

From: Association of a multiple-step action with cervical lymph node yield of oral cancer patients in an Asian country

Variable

Period 1

(01–2009–09–2015)

Period 2

(10–2015–09–2018)

Difference**

p value#

All patients

    

 Department A

22.8

37.4

14.6

 < 0.001

 Department B

33.4

33.9

0.5

0.800

 Difference*

 − 10.6

 − 3.5

  

 p value#

 < 0.001

0.099

  

END

    

 Department A

21.2

34.2

13.0

 < 0.001

 Department B

29.3

33.5

4.2

0.053

 Difference*

8.1

0.7

  

 p value#

 < 0.001

0729

  

RND

    

 Department A

24.3

41.5

17.2

 < 0.001

 Department B

38.0

35.0

 − 3.0

0.395

 Difference*

13.1

6.3

  

 p value#

 < 0.001

0.110

  
  1. END, elective neck dissection; RND, radical neck dissection
  2. *Difference between Department A group and Department B group
  3. **Difference between period 1 and period 2
  4. #Two-sample t-test
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BMC Oral Health

ISSN: 1472-6831

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