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Table 2 Socioeconomic status in the recruitment regions

From: Dental practitioner recruitment for a randomized clinical trial in the field to evaluate the performance of a new glass ionomer restoration material

Zip code

Inhabitants per km2

One-person household with no children [%]

Multi-person household with children [%]

Household income (< €1 T) [%]

Household income (< €4 T) [%]

Rate of unemployment [%]

0

Mean (SD)

1129.80 (810.62)

33.52 (12.01)

23.34 (1,21)

18.90 (0.5)

9.18 (0.91)

15.82 (1.81)

SE

209.30

3.10

0.31

0.13

0.24

0.47

Minimum

171.0

19.3

21.9

18.5

8.0

13.7

Maximum

1788.0

43.0

24.3

19.5

10.0

17.5

P value (¥/†)

…/n.s.

…/n.s.

…/n.s.

…/n.s.

…/n.s.

…/n.s.

2

Mean (SD)

211.60 (130.42)

36.74 (2.11)

32.27 (1.54)

13.33 (1.81)

16.46 (2.37)

9.82 (3.37)

SE

41.24

0.67

0.49

0.57

0.75

1.06

Minimum

146.0

33.3

30.8

9.9

15.0

6.8

Maximum

459.0

38.5

33.8

14.3

21.0

14.7

 

P value (¥/†)

<0.0001/n.s.

n.s./n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

3

Mean (SD)

475.80 (377.99)

35.60 (4.84)

34.71 (4.93)

11.64 (1.76)

17.85 (1.82)

8.39 (2.18)

SE

69.01

0.88

0.89

0.32

0.33

0.39

Minimum

109.0

32.1

26.0

8.8

16.0

6.4

Maximum

1104.0

44.8

39.3

14.4

21.0

12.3

 

P value (¥/†)

<0.01/n.s.

n.s./n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

4

Mean (SD)

636.50 (327.17)

34.26 (1.90)

33.09 (0.43)

9.41 (1.55)

21.36 (2.25)

9.63 (1.00)

SE

71.39

0.41

0.43

0.33

0.49

0.21

Minimum

210.0

29.5

30.1

7.8

17.0

8.5

Maximum

1469.0

39.6

37.6

12.9

24.0

11.6

 

P value (¥/†)

n.s./n.s.

n.s./n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

5

Mean (SD)

418.49 (204.16)

33.88 (1.98)

33.30 (1.41)

10.35 (1.13)

19.85 (2.12)

9.58 (1.13)

SE

31.13

0.30

0.21

0.17

0.32

0.17

Minimum

195.0

30.8

27.9

8.1

15.0

7.4

Maximum

1175.

43.9

38.1

13.8

24.0

11.3

 

P value (¥/†)

n.s./n.s.

n.s./<0.01

<0.0001/<0.0001

<0.0001/<0.01

<0.0001/<0.0001

<0.0001/<0.001

6

Mean (SD)

810.20 (323.78)

36.22 (0.62)

31.28 (1.52)

9.20 (1.56)

23.14 (2.81)

8.60 (0)

SE

144.80

0.28

0.68

0.70

1.26

0.10

Minimum

231.0

35.1

30.6

8.5

18.0

8.6

Maximum

955.0

36.5

34.0

12.0

24.0

8.7

 

P value (¥/†)

n.s./n.s.

n.s./n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.01/n.s.

7/8a

Mean (SD)

560.30 (433.38)

37.56 (4.22)

31.44 (5.27)

11.10 (2.91)

18.31 (3.61)

6.75 (2.91)

SE

96.90

0.94

1.18

0.65

0.80

0.65

Minimum

134.0

32.4

21.9

7.6

8.0

2.8

Maximum

1375.0

43.9

38.7

19.5

23.0

11.0

 

P value (¥/†)

<0.01/n.s.

n.s./n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

<0.0001/n.s.

  1. aBecause of the close location, these regions were combined for the calculations
  2. ¥Wilcoxon-Mann-Whitney test, U-Test, P < 0.05
  3. †Chi-squared test, P < 0.05