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. 2013 Nov 23;13:1091. doi: 10.1186/1471-2458-13-1091

Table 3.

Descriptives of study population

  Total New letter PHS letter No letter
N
1448
389
346
713
Age (SD)
24.1 (3.5)
24.0 (3.6)
23.9 (3.4)
24.3 (3.4)
Gender (male:female)
370:1078
103:286
88:258
179:534
education level
 
 
 
 
none or primary school
58
22
9
27
Pre-vocational secondary education (VMBO)
81
21
27
33
Secondary vocational education (MBO)
197
51
39
107
Senior general secondary education (HAVO) or Pre-university education (VWO)
382
105
96
181
Higher professional education (HBO)
264
76
70
118
University education (WO) 466 114 105 247

No significant difference between groups. All p’s > .17.