Table 1 Demographic and Behavioral Profiles of the Study Groups.

From: Brain activations associated with fearful experience show common and distinct patterns between younger and older adults in the hippocampus and the amygdala

All (40)

F/M (27/13)

Age

pFear

pPain

eFear

FDV

MDAS

Mean

 

44.4

4.7

4.5

4.1

3.0

12.2

Median

 

48.0

4.7

4.7

3.8

2.5

12.0

Std

 

18.1

2.4

2.0

2.1

2.3

4.1

Min

 

23

0.0

0.0

−0.17

0

5

Max

 

74

9.7

8.3

7.8

10

22

Normalitya

 

<0.001

0.797

0.122

0.302

0.004

0.120

Older (20)

F/M (16/4)

      

Mean

 

61.0

4.0

4.1

3.6

2.8

10.7

Median

 

59.0

4.2

4.5

3.2

2.0

10.5

Std

 

7.3

2.6

2.2

2.5

2.4

3.6

Min

 

50

0.0

0.0

−0.2

0

5

Max

 

74

9.7

8.3

7.8

8

18

Normalitya

 

0.112

0.454

0.069

0.276

0.020

0.464

Younger (20)

F/M (11/9)

      

Mean

 

27.8

5.3

4.9

4.5

3.3

13.8

Median

 

27.0

5.7

4.7

4.3

3.0

12.0

Std

 

5.8

2.1

1.8

1.6

2.1

4.2

Min

 

23

1.0

1.7

2.7

0

8

Max

 

46

8.0

8.0

7.7

10

22

Normalitya

 

0.001

0.190

0.422

0.048

0.008

0.175

Between sub-group comparisonb

 

Gender

      

p value

0.177

<0.001

0.094

0.224

0.172

0.254

0.016

  1. eFear, fear elicited by the video paradigm; FDV, frequency of visiting a dentist in the past two years; MDAS, the score of the Modified Dental Anxiety Scale; PCS, the score of the Pain Catastrophizing Scale; pFear, fear of prior dental treatment; pPain, pain of prior dental treatment; Std, standard deviation.
  2. aNormality was examined using the Shapiro-Wilk test.
  3. bBetween-group comparison was performed using the Chi-square test with Yates’ correction for Gender, the independent t-tests for pFear, pPain, eFear, MDAS, and the Mann-Whitney U test for age and FDV.
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