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Table 2 Growth curve of rPDL cells and hPDL cells by plotting mean optical density over time

From: Lapine periodontal ligament stem cells for musculoskeletal research in preclinical animal trials

Days

Groupsa

Mean ± standard deviation (N = 9)

Pairwise comparisonb

Between groups

Within group

P value

Group 1

Group 2

Day 1

1

0.017 ± 0.007

0.182

Day 1 < 

Day 1 < 

2

0.025 ± 0.016

 

Day 2 < 

 Day 2 <

Day 2

1

0.085 ± 0.019

0.437

Day 4 <

Day 4 <

2

0.100 ± 0.054

 

Day 6 <

Day 6 <

Day 4

1

0.306 ± 0.061

0.000*

Day 8 < 

Day 8 < 

2

0.588 ± 0.061

 

Day 10 <

Day 10 =

Day 6

1

0.551 ± 0.099

0.000*

Day 12 < 

Day 12 =

2

2.255 ± 0.148

 

Day 14

Day 14

Day 8

1

0.915 ± 0.186

0.000*

  

2

2.510 ± 0.144

   

Day 10

1

1.268 ± 0.189

0.000*

  

2

2.764 ± 0.075

   

Day 12

1

1.585 ± 0.070

0.000*

  

2

2.818 ± 0.052

   

Day 14

1

1.939 ± 0.121

0.000*

  

2

2.868 ± 0.060

   
  1. S.E standard error
  2. aGroup 1: rPDL cells; Group 2: hPDL cells
  3. bAdjustment for multiple comparisons: Bonferroni
  4. * Statistically significant at p < 0.05