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Table 2 Characteristics of studies*

From: Type D personality in the general population: a systematic review of health status, mechanisms of disease, and work-related problems

Study Country Size sample Participants Mean age in years Sex % Type D Design Research group Study quality
[8] U.K. 564 British males M = 26.2
R = 18-55
564 men 29% Cross-sectional Other 8
[9] Belgium 155 policemen and nurses M = 32
R = 20 - 56
66 men
85 women
35.5% Cross-sectional Co RPS 7
[10] Netherlands 17 right-handed men M = 23
SD = 2.4
17 men
no women
23.5% Cross-sectional Co RPS 6
[11] Canada 173 university students M = 20.4 86 men
87 women
Unknown Prospective Other 9
[12] Germany 492 employees at manufactory M = 40.5
SD = 11.4
438 men
54 women
Unknown Cross-sectional Other 9
[13] Netherlands 668 children M = 10.3
R = 8.6 - 12.8
368 boys
300 girls
27.5% Prospective Other 7
[14] Netherlands 151 prison workers M = 44.0
R = 22 - 59
111 men
40 women
16.6% Cross-sectional Other 8
[15] Netherlands 3331 healthy twins M = 17.2
R = 12 - 24
1519 men
1812 women
26.7% Cross-sectional Co RPS 8
[16] Netherlands 755 student teachers M = 18.8
R = 16-29
No men
755 women
25.9% Cross-sectional Other 9
[17] Poland 79 psychiatrists and nurses M = 39.7
S = 8.2
25 men
28 women
27.8% Cross-sectional Other 6
[18] Ukraine 250 university students M = 20.9
SD = 3.4
113 men
137 women
22.4% Prospective Co RPS 9
[19] U.K. 334 university students M = 19.5
R = 18-41
180 men
154 women
24.9% Cross-sectional Other 7
[20] Germany 634 employees at manufactory M = 39.9
SD = 10.7
575 men
67 women
Unknown Cross-sectional Other 7
[21] Netherlands 5404 adults M = 45.8
SD = 15.9
2697 men
2707 women
Unknown Prospective Co RPS 9
[22] Belgium/Netherlands 932 female teachers M = 25
IQR = 19-42
no men
932 women
28.4% Cross-sectional Other 8
[23] Netherlands 622 adults M = 54.2
SD = 14
318 men
304 women
18.1% Cross-sectional Co RPS 8
[24] Belgium 132 adults M = 33.7
SD = 14.5
70 men
57 women
Unknown Cross-sectional Other 9
[25] U.K. 84 adults M = 22.0
SD = 6.8
42 men
42 women
Unknown Prospective Other 9
[26] U.K./Ireland 1012 adults M = 20.5
SD = 4.8
225 men
787 women
38.5% Cross-sectional Other 8
  1. * In alphabetical order
  2. R = range; SD = standard deviation; IQR = interquartile range; Co RPS = Center of Research on Psychology in Somatic Diseases; Other = other research group not related to Co RPS.